1
|
Lemmel H, Jentschel M, Abele H, Lafont F, Guerard B, Sasso CP, Mana G, Massa E. Neutron interference from a split-crystal interferometer. J Appl Crystallogr 2022; 55:870-875. [PMID: 35974723 PMCID: PMC9348866 DOI: 10.1107/s1600576722006082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 06/08/2022] [Indexed: 11/25/2022] Open
Abstract
The first successful operation of a neutron interferometer with a separate beam-recombining crystal is reported. This result was achieved at the neutron interferometry setup S18 at the ILL in Grenoble by a collaboration between TU Wien, ILL, Grenoble, and INRIM, Torino. While previous interferometers have been machined out of a single-crystal block, in this work two crystals were successfully aligned on nanoradian and picometre scales, as required to obtain neutron interference. As a decisive proof-of-principle demonstration, this opens the door to a new generation of neutron interferometers and exciting applications.
Collapse
Affiliation(s)
- H. Lemmel
- ATI – Atominstitut, TU Wien, Wien, Austria
| | | | - H. Abele
- ATI – Atominstitut, TU Wien, Wien, Austria
| | - F. Lafont
- ILL – Institut Laue–Langevin, Grenoble, France
| | - B. Guerard
- ILL – Institut Laue–Langevin, Grenoble, France
| | - C. P. Sasso
- INRIM – Istituto Nazionale di Ricerca Metrologica, Torino, Italy
| | - G. Mana
- INRIM – Istituto Nazionale di Ricerca Metrologica, Torino, Italy
| | - E. Massa
- INRIM – Istituto Nazionale di Ricerca Metrologica, Torino, Italy
| |
Collapse
|
2
|
Mărginean N, Little D, Tsunoda Y, Leoni S, Janssens RVF, Fornal B, Otsuka T, Michelagnoli C, Stan L, Crespi FCL, Costache C, Lica R, Sferrazza M, Turturica A, Ayangeakaa AD, Auranen K, Barani M, Bender PC, Bottoni S, Boromiza M, Bracco A, Călinescu S, Campbell CM, Carpenter MP, Chowdhury P, Ciemała M, Cieplicka-Oryǹczak N, Cline D, Clisu C, Crawford HL, Dinescu IE, Dudouet J, Filipescu D, Florea N, Forney AM, Fracassetti S, Gade A, Gheorghe I, Hayes AB, Harca I, Henderson J, Ionescu A, Iskra ŁW, Jentschel M, Kandzia F, Kim YH, Kondev FG, Korschinek G, Köster U, Krzysiek M, Lauritsen T, Li J, Mărginean R, Maugeri EA, Mihai C, Mihai RE, Mitu A, Mutti P, Negret A, Niţă CR, Olăcel A, Oprea A, Pascu S, Petrone C, Porzio C, Rhodes D, Seweryniak D, Schumann D, Sotty C, Stolze SM, Şuvăilă R, Toma S, Ujeniuc S, Walters WB, Wu CY, Wu J, Zhu S, Ziliani S. Shape Coexistence at Zero Spin in ^{64}Ni Driven by the Monopole Tensor Interaction. Phys Rev Lett 2020; 125:102502. [PMID: 32955302 DOI: 10.1103/physrevlett.125.102502] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Accepted: 07/31/2020] [Indexed: 06/11/2023]
Abstract
The low-spin structure of the semimagic ^{64}Ni nucleus has been considerably expanded: combining four experiments, several 0^{+} and 2^{+} excited states were identified below 4.5 MeV, and their properties established. The Monte Carlo shell model accounts for the results and unveils an unexpectedly complex landscape of coexisting shapes: a prolate 0^{+} excitation is located at a surprisingly high energy (3463 keV), with a collective 2^{+} state 286 keV above it, the first such observation in Ni isotopes. The evolution in excitation energy of the prolate minimum across the neutron N=40 subshell gap highlights the impact of the monopole interaction and its variation in strength with N.
Collapse
Affiliation(s)
- N Mărginean
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - D Little
- Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3255, USA
- Triangle Universities Nuclear Laboratory, Duke University, Durham, North Carolina 27708-2308, USA
| | - Y Tsunoda
- Center for Nuclear Study, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - S Leoni
- Dipartimento di Fisica, Universitá degli Studi di Milano, I-20133 Milano, Italy
- INFN sezione di Milano via Celoria 16, 20133 Milano, Italy
| | - R V F Janssens
- Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3255, USA
- Triangle Universities Nuclear Laboratory, Duke University, Durham, North Carolina 27708-2308, USA
| | - B Fornal
- Institute of Nuclear Physics, PAN, 31-342 Kraków, Poland
| | - T Otsuka
- Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- KU Leuven, Instituut voor Kern- en Stralingsfysica, 3000 Leuven, Belgium
| | - C Michelagnoli
- Institut Laue-Langevin (ILL), 71 Avenue des Martyrs, 38042 Grenoble, France
| | - L Stan
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - F C L Crespi
- Dipartimento di Fisica, Universitá degli Studi di Milano, I-20133 Milano, Italy
- INFN sezione di Milano via Celoria 16, 20133 Milano, Italy
| | - C Costache
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - R Lica
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - M Sferrazza
- Département de Physique, Université libre de Bruxelles, B-1050 Bruxelles, Belgium
| | - A Turturica
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - A D Ayangeakaa
- Department of Physics, United States Naval Academy, Annapolis, Maryland 21402, USA
| | - K Auranen
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - M Barani
- Dipartimento di Fisica, Universitá degli Studi di Milano, I-20133 Milano, Italy
- INFN sezione di Milano via Celoria 16, 20133 Milano, Italy
- Institut Laue-Langevin (ILL), 71 Avenue des Martyrs, 38042 Grenoble, France
| | - P C Bender
- Department of Physics and Applied Physics, University of Massachusetts Lowell, Lowell, Massachusetts 01854, USA
| | - S Bottoni
- Dipartimento di Fisica, Universitá degli Studi di Milano, I-20133 Milano, Italy
- INFN sezione di Milano via Celoria 16, 20133 Milano, Italy
| | - M Boromiza
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - A Bracco
- Dipartimento di Fisica, Universitá degli Studi di Milano, I-20133 Milano, Italy
- INFN sezione di Milano via Celoria 16, 20133 Milano, Italy
| | - S Călinescu
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - C M Campbell
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - M P Carpenter
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - P Chowdhury
- Department of Physics and Applied Physics, University of Massachusetts Lowell, Lowell, Massachusetts 01854, USA
| | - M Ciemała
- Institute of Nuclear Physics, PAN, 31-342 Kraków, Poland
| | | | - D Cline
- Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA
| | - C Clisu
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - H L Crawford
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - I E Dinescu
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - J Dudouet
- Université Lyon 1, CNRS/IN2P3, IPN-Lyon, F-69622, Villeurbanne, France
| | - D Filipescu
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - N Florea
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - A M Forney
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, USA
| | - S Fracassetti
- Dipartimento di Fisica, Universitá degli Studi di Milano, I-20133 Milano, Italy
- INFN sezione di Milano via Celoria 16, 20133 Milano, Italy
| | - A Gade
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - I Gheorghe
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - A B Hayes
- National Nuclear Data Center, Brookhaven National Laboratory, Upton, New York 11973-5000, USA
| | - I Harca
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - J Henderson
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A Ionescu
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - Ł W Iskra
- INFN sezione di Milano via Celoria 16, 20133 Milano, Italy
| | - M Jentschel
- Institut Laue-Langevin (ILL), 71 Avenue des Martyrs, 38042 Grenoble, France
| | - F Kandzia
- Institut Laue-Langevin (ILL), 71 Avenue des Martyrs, 38042 Grenoble, France
| | - Y H Kim
- Institut Laue-Langevin (ILL), 71 Avenue des Martyrs, 38042 Grenoble, France
| | - F G Kondev
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - G Korschinek
- Technische Universität München, 80333 München, Germany
| | - U Köster
- Institut Laue-Langevin (ILL), 71 Avenue des Martyrs, 38042 Grenoble, France
| | - M Krzysiek
- Institute of Nuclear Physics, PAN, 31-342 Kraków, Poland
| | - T Lauritsen
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - J Li
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - R Mărginean
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - E A Maugeri
- Paul Scherrer Institut, 5232 Villigen, Switzerland
| | - C Mihai
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - R E Mihai
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - A Mitu
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - P Mutti
- Institut Laue-Langevin (ILL), 71 Avenue des Martyrs, 38042 Grenoble, France
| | - A Negret
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - C R Niţă
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - A Olăcel
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - A Oprea
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - S Pascu
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - C Petrone
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - C Porzio
- Dipartimento di Fisica, Universitá degli Studi di Milano, I-20133 Milano, Italy
- INFN sezione di Milano via Celoria 16, 20133 Milano, Italy
| | - D Rhodes
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - D Seweryniak
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - D Schumann
- Paul Scherrer Institut, 5232 Villigen, Switzerland
| | - C Sotty
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - S M Stolze
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - R Şuvăilă
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - S Toma
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - S Ujeniuc
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - W B Walters
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, USA
| | - C Y Wu
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J Wu
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - S Zhu
- National Nuclear Data Center, Brookhaven National Laboratory, Upton, New York 11973-5000, USA
| | - S Ziliani
- Dipartimento di Fisica, Universitá degli Studi di Milano, I-20133 Milano, Italy
- INFN sezione di Milano via Celoria 16, 20133 Milano, Italy
| |
Collapse
|
3
|
Degenkolb S, Geltenbort P, Jenke T, Jentschel M, Nesvizhevsky V, Roccia S, Soldner T, Zimmer O, Rebreyend D, Stutz A. Preface. EPJ Web Conf 2019. [DOI: 10.1051/epjconf/201921900001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
This volume contains the written proceedings of PPNS-2018, the international workshop on “Particle Physics at Neutron Sources” hosted by the LPSC in Grenoble, France from May 24th–26th, 2018.
Collapse
|
4
|
Ansari S, Régis JM, Jolie J, Saed-Samii N, Warr N, Korten W, Zielińska M, Salsac MD, Blanc A, Jentschel M, Köster U, Mutti P, Soldner T, Simpson G, Drouet F, Vancraeyenest A, de France G, Clément E, Stezowski O, Ur C, Urban W, Regan P, Podolyák Z, Larijani C, Townsley C, Carroll R, Wilson E, Mach H, Fraile L, Paziy V, Olaizola B, Vedia V, Bruce A, Roberts O, Smith J, Scheck M, Kröll T, Hartig AL, Ignatov A, Ilieva S, Lalkovski S, Mărginean N, Otsuka T, Shimizu N, Togashi T, Tsunoda Y. Lifetime measurement in neutron-rich A~100 nuclei. EPJ Web Conf 2018. [DOI: 10.1051/epjconf/201819305003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Lifetimes of excited states of the 98;100;102Zr nuclei were measured by using the Generalized Centroid Difference Method. The nuclei of interest were populated via neutron-induced fission of 241Pu and 235U during the EXILL-FATIMA campaign. The obtained lifetimes were used to calculate the B(E2) transition strengths and β deformation parameters which were then compared with the recent theoretical predictions obtained with Monte Carlo Shell Model.
Collapse
|
5
|
Simpson G, Grachev I, Thiamova G, Ramdhane M, Sieja K, Blanc A, Jentschel M, Köster U, Mutti P, Soldner T, de France G, Ur C, Urban W. Excited States and Collectivity in 88Se. EPJ Web Conf 2018. [DOI: 10.1051/epjconf/201819305002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The γ decays of excited states in the very neutron-rich nucleus 88Se have been observed following the cold neutron-induced fission of 235U at the PF1B facility of the Institut Laue-Langevin (ILL), Grenoble. The EXILL array was used to measure γ - γ - γ coincidences, which were then analysed to build a level scheme of 88Se. A low (2+1) energy hints at the onset of quadrupole deformation and the identification of possible members of a (2+2) band provide evidence for γ vibrations. Shell-model calculations using a 78Ni core reproduce the experimental decay scheme well, implying that interactions between particles in the π f5/2 p and vsd orbits are responsible for much of the collectivity present. The algebraic collective model has also been used to interpret the experimental data, showing that that the experimental spectrum is consistent with 88Se being a transitional nucleus, possessing weak static β deformation and γ instability.
Collapse
|
6
|
Mutti P, Blanc A, Jentschel M, Köster U, Michelagnoli C, Ruiz-Martinez E. FIPPS: Fission Product Prompt Gamma-Ray Spectrometer, a New High Efficiency HPGe Array for Nuclear Spectroscopy. EPJ Web Conf 2018. [DOI: 10.1051/epjconf/201817001013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
7
|
Régis JM, Simpson G, Mach H, Blanc A, Jentschel M, Köster U, Mutti P, Soldner T, de France G, Ur C, Urban W, Jolie J, Saed-Samii N, Warr N, Fraile L, Paziy V, Regan P, Podolyák Z, Lalkovski S, Bruce A, Kröll T, Korten W, Marginean N. The γ-γ fast-timing technique and the EXILL&FATIMA campaign. EPJ Web Conf 2018. [DOI: 10.1051/epjconf/201819304008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
At the Institut Laue-Langevin in Grenoble, germanium-gated γ-γ fast-timing lifetime measurements of nuclear excited states in neutron-rich nuclei have been performed within a prompt γ-ray spectroscopy experimental campaign. We report on results obtained from the cold-neutron induced fission of 235U. The excited secondary fission products were stopped almost instantaneously within the thick target and the γ rays emitted were collected triggerlessly using the EXILL&FATIMA mixed array of HPGe and LaBr3(Ce) detectors. Precise lifetimes could be determined by analysing the γ-γ time difference spectra using the generalized centroid difference method. This picosecondsensitive method provides many advantages and is briefly explained. Still, the major source of systematic errors is related to the contribution of time-correlated Compton background. The EXILL&FATIMA results are discussed with respect to the typical energy-dependent timing behaviour of the background. According to the time response of the background, appropriate methods and a time correction for the sub-nanosecond regime are proposed.
Collapse
|
8
|
Bottoni S, Cieplicka-Oryńczak N, Bocchi G, Leoni S, Fornal B, Colò G, Bortignon P, Benzoni G, Blanc A, Bracco A, Crespi F, Jentschel M, Köster U, Michelagnoli C, Million B, Mutti P, Soldner T, Türler A, Ur C, Urban W. (n,γ) reactions on rare Ca isotopes: Valence-hole - core excitation couplings in 47Ca. EPJ Web Conf 2018. [DOI: 10.1051/epjconf/201819305001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Recent results on the structure of 47Ca will be presented. The nucleus of interest was populated via the cold-neutron capture 46Ca(n,γ) reaction, on a rare 46Ca target, during the EXILL experimental campaign at the nuclear reactor of Institut Laue- Langevin in Grenoble. High-resolution γ-ray spectroscopy, performed with a composite array of HPGe detectors, enabled the identification of new transitions deexciting states between the neutron-capture level and the ground state. Experimental data will be compared with a novel microscopic theoretical model, currently under development, specifically designed to describe the low-lying structure of odd-mass nuclei with one valence particle/hole outside a spherical doubly-magic core, using the Skyrme effective interaction self-consistently.
Collapse
|
9
|
Habs D, Günther MM, Jentschel M, Urban W. Erratum: Refractive Index of Silicon at γ Ray Energies [Phys. Rev. Lett. 108, 184802 (2012)]. Phys Rev Lett 2017; 118:169904. [PMID: 28474941 DOI: 10.1103/physrevlett.118.169904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Indexed: 06/07/2023]
Abstract
This corrects the article DOI: 10.1103/PhysRevLett.108.184802.
Collapse
|
10
|
Jolie J, Régis JM, Wilmsen D, Ahmed S, Pfeiffer M, Saed-Samii N, Warr N, Blanc A, Jentschel M, Köster U, Mutti P, Soldner T, Simpson G, De France G, Urban W, Drouet F, Vancraeyenest A, Baczyk P, Czerwinski M, Korgul A, Mazzocchi C, Rzaca-Urban T, Bruce A, Roberts O, Fraile L, Mach H, Paziy V, Ignatov A, Ilieva S, Kröll T, Scheck M, Thürauf M, Ivanova D, Kisyov S, Lalkovski S, Podolyák Z, Regan P, Korten W, Zielinska M, Salsac M, Habs D, Thirolf P, Ur CA, Bernards C, Casten R, Cooper N, Werner V, Cakirli R, Leoni S, Benzoni G, Bocchi G, Bottoni S, Crespi F, Fornal B, Cieplicka N, Szpak B, Petrache C, Leguillon R, John R, Lorenz C, Massarczyk R, Schwengner R, Curien D, Lozeva R, Sengele L, Marginean N, Lica R. The (n,γ) campaigns at EXILL. EPJ Web of Conferences 2015. [DOI: 10.1051/epjconf/20159301014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
11
|
Blanc A, Chebboubi A, de France G, Drouet F, Faust H, Jentschel M, Kessedjian G, Köster U, Leoni S, Materna T, Mutti P, Panebianco S, Sage C, Simpson G, Soldner T, Ur CA, Urban W, Vancraeyenest A. From EXILL (EXogam at the ILL) to FIPPS (FIssion Product Promptγ-ray Spectrometer). EPJ Web of Conferences 2015. [DOI: 10.1051/epjconf/20159301015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
12
|
Bączyk P, Czerwiński M, Korgul A, Rząca-Urban T, Urban W, Blanc A, Jentschel M, Mutti P, Köster U, Soldner T, de France G, Simpson G, Ur C. High precision γspectroscopy of 69,71Zn from ( n, γ) reactions using EXILL. EPJ Web of Conferences 2015. [DOI: 10.1051/epjconf/20159301042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
13
|
Lorenz C, John R, Massarczyk R, Schwengner R, Blanc A, de France G, Jentschel M, Köster U, Mutti P, Simpson G, Soldner T, Urban W, Valenta S, Belgya T. Neutron-capture experiment on 77Se with EXILL at ILL Grenoble. EPJ Web of Conferences 2015. [DOI: 10.1051/epjconf/20159301050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
14
|
|
15
|
Régis JM, Jolie J, Mach H, Simpson G, Blazhev A, Pascovici G, Pfeiffer M, Rudigier M, Saed-Samii N, Warr N, Blanc A, de France G, Jentschel M, Köster U, Mutti P, Soldner T, Ur C, Urban W, Bruce A, Drouet F, Fraile L, Ilieva S, Korten W, Kröll T, Lalkovski S, Mărginean S, Paziy V, Podolyák Z, Regan P, Stezowski O, Vancraeyenest A. The Generalized Centroid Difference method for lifetime measurements via γ-γcoincidences using large fast-timing arrays. EPJ Web of Conferences 2015. [DOI: 10.1051/epjconf/20159301013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
16
|
Materna T, Letourneau A, Amouroux C, Marchix A, Litaize O, Sérot O, Regnier D, Blanc A, Jentschel M, Köster U, Mutti P, Soldner T, Simpson G, Leoni S, de France G, Urban W. Fission studies by prompt gamma-ray spectrometry. EPJ Web of Conferences 2015. [DOI: 10.1051/epjconf/20159302020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
17
|
de France G, Blanc A, Drouet F, Jentschel M, Köster U, Mutti P, Régis J, Simpson G, Soldner T, Stezowski O, Ur C, Urban W, Vancrayenest A. Spectroscopy of neutron rich nuclei using cold neutron induced fission of actinide targets at the ILL: the EXILL campaign. EPJ Web of Conferences 2014. [DOI: 10.1051/epjconf/20146602010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
18
|
Blanc A, de France G, Drouet F, Jentschel M, Köster U, Mancuso C, Mutti P, Régis J, Simpson G, Soldner T, Ur C, Urban W, Vancraeyenest A. Spectroscopy of neutron rich nuclei using cold neutron induced fission of actinide targets at the ILL: The EXILL campaign. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20136201001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
19
|
Massa E, Mana G, Krempel J, Jentschel M. Polarization delivery in heterodyne interferometry. Opt Express 2013; 21:27119-27126. [PMID: 24216936 DOI: 10.1364/oe.21.027119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Optically heterodyned laser interferometry, as applied to measuring linear displacements, requires different optical frequencies to be encoded onto unique polarization states. To eliminate non-linear contributions to the interferometer signal, the frequency difference must be introduced after beam splitting and the interfering beams must be recombined via spatially separated paths. The polarization jitter of the frequency-shifted beams still originates a noise in the beat-signal phase. A formula is given expressing the noise amplitude in terms of the illuminating beam's extinction ratio.
Collapse
|
20
|
Konstantinopoulos T, Astier A, Petrache C, Abudra A, Bontemps R, Deloncle I, Kaim S, Leguillon R, Petrache C, Porquet MG, Zerrouki T, Grente L, Salsac MD, Zielinska M, France GD, Janas Z, Karny M, Korgul A, Ramdhane M, Gey G, Simpson G, Vancraeyenest A, Blanc A, Jentschel M, Köster U, Mutti P, Soldner T, Urban W, Duchêne G, Lozeva R, Ibrahim F, Gargano A, Covello A, Mengoni D, Ur C, Sferrazza M, Melon B. γ-ray spectroscopy of fission fragments from the cold-neutron 235U induced fission with EXILL. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20136201006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
21
|
Thirolf P, Csige L, Habs D, Günther M, Jentschel M, Krasznahorkay A, Filipescu D, Glodariu T, Stroe L, Tesileanu O, Karwowski H, Rich G. Perspectives for photofission studies with highly brilliant, monochromaticγ–ray beams. EPJ Web of Conferences 2012. [DOI: 10.1051/epjconf/20123808001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
22
|
Abstract
For x rays the real part of the refractive index, dominated by Rayleigh scattering, is negative and converges to zero for higher energies. For γ rays a positive component, related to Delbrück scattering, increases with energy and becomes dominating. The deflection of a monochromatic γ beam due to refraction was measured by placing a Si wedge into a flat double crystal spectrometer. Data were obtained in an energy range from 0.18 MeV to 2 MeV. The data are compared to theory, taking into account elastic and inelastic Delbrück scattering as well as recent results on the energy dependence of the pair creation cross section. Probably a new field of γ optics with many new applications opens up.
Collapse
Affiliation(s)
- D Habs
- Ludwig-Maximilians-Universität München, D-85748 Garching, Germany
| | | | | | | |
Collapse
|
23
|
Jentschel M, Urban W, Krempel J, Tonev D, Dudek J, Curien D, Lauss B, de Angelis G, Petkov P. Ultrahigh-resolution γ-ray spectroscopy of 156Gd: a test of tetrahedral symmetry. Phys Rev Lett 2010; 104:222502. [PMID: 20867162 DOI: 10.1103/physrevlett.104.222502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2010] [Indexed: 05/29/2023]
Abstract
Tetrahedral symmetry in strongly interacting systems would establish a new class of quantum effects at subatomic scale. Excited states in 156Gd that could carry the information about the tetrahedral symmetry were populated in the 155Gd(n,γ)156Gd reaction and studied using the GAMS4/5 Bragg spectrometers at the Institut Laue-Langevin. We have identified the 5(1)- → 3(1)- transition of 131.983(12) keV in 156Gd and determined its intensity to be 1.9(3)x10(-6) per neutron capture. The lifetime τ=220(-30)(+180) fs of the 5(1)- state in 156Gd has been measured using the GRID technique. The resulting B(E2)=293(-134)(+6) Weisskopf unit rate of the 131.983 keV transition provides the intrinsic quadrupole moment of the 5(1)- state in 156Gd to be Q0=7.1(-1.6)(+0.7) b. This large value, comparable to the quadrupole moment of the ground state in 156Gd, gives strong evidence against tetrahedral symmetry in the lowest odd-spin, negative-parity band of 156Gd.
Collapse
Affiliation(s)
- M Jentschel
- Institut Laue-Langevin, 6 rue Jules Horowitz, BP 156, F-38042 Grenoble, France
| | | | | | | | | | | | | | | | | |
Collapse
|
24
|
de Haan RC, Aprahamian A, Börner HG, Doll C, Jentschel M, Bruce AM, Lesher SR. Lifetime Measurements in (178)Hf. J Res Natl Inst Stand Technol 2000; 105:125-31. [PMID: 27551596 PMCID: PMC4878339 DOI: 10.6028/jres.105.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 07/22/1999] [Indexed: 05/24/2023]
Abstract
Lifetimes of levels from K(π) = 2(+), K(π) = 4(+) and several K(π) = 0(+) bands have been measured in the (178)Hf nucleus using the GRID technique. Lifetimes of the 2(+) and 3(+) levels were measured within the K(π) = 2(+) γ band. A lower limit was established for the lifetime of the 4(+) level of the K(π) = 4(+) band. The resulting upper limits for the absolute B(E2) values exclude collective transitions from the K(π) = 4(+) to the ground state band but not to the K(π)= 2(+) band. Level lifetimes were also measured for several states within three separate K(π)= 0(+) bands. Evidence is presented for a previously unobserved case of two excited K(π)= 0(+) bands being connected via collective E2 transitions.
Collapse
Affiliation(s)
- R C de Haan
- Physics Department, University of Notre Dame, Notre Dame, Indiana 46556
| | - A Aprahamian
- Physics Department, University of Notre Dame, Notre Dame, Indiana 46556
| | - H G Börner
- Institut Laue-Langevin, 38042 Grenoble, France
| | - C Doll
- Institut Laue-Langevin, 38042 Grenoble, France
| | - M Jentschel
- Institut Laue-Langevin, 38042 Grenoble, France
| | - A M Bruce
- University of Brighton, Brighton, BN2 4GJ, United Kingdom
| | - S R Lesher
- Physics Department, University of Notre Dame, Notre Dame, Indiana 46556
| |
Collapse
|
25
|
Bečvář F, Krtička M, Jentschel M. Simulations of Gamma Cascades and Modelling Atomic Collision Chains. J Res Natl Inst Stand Technol 2000; 105:113-23. [PMID: 27551595 PMCID: PMC4878338 DOI: 10.6028/jres.105.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 07/22/1999] [Indexed: 05/29/2023]
Abstract
A new method for simulation of nuclear γ cascades by the Monte Carlo technique is described. It makes it possible to generate artificially individual events of the γ-cascade decay of neutron capturing states in heavy nuclei. For the purpose of determination of lifetimes of nuclear levels by the GRID method the previously developed Mean Free Path Approach for modelling atomic collisions and their interplay with cascades has been generalized. Examples of the use of this generalization for determination of lifetimes of selected (150)Sm and (158)Gd levels are given and discussed.
Collapse
Affiliation(s)
- F Bečvář
- Faculty of Mathematics and Physics, Charles University V Holešovičkách 2, CZ-180 00 Prague 8, Czech Republic
| | - M Krtička
- Faculty of Mathematics and Physics, Charles University V Holešovičkách 2, CZ-180 00 Prague 8, Czech Republic
| | - M Jentschel
- Institut Laue-Langevin, F-38042 Grenoble, France
| |
Collapse
|
26
|
Karmann A, Wesch W, Weber B, Börner HG, Jentschel M. Application of GRID to Foreign Atom Localization in Single Crystals. J Res Natl Inst Stand Technol 2000; 105:177-182. [PMID: 27551605 PMCID: PMC4878348 DOI: 10.6028/jres.105.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Accepted: 07/22/1999] [Indexed: 06/06/2023]
Abstract
The application of GRID (Gamma Ray Induced Doppler broadening) spectroscopy to the localization of foreign atoms in single crystals is demonstrated on erbium in YAP. By the investigation of the Doppler broadened secondary γ line for two crystalline directions, the Er was determined to be localized on the Y site. Conditions for the nuclear parameters of the impurity atoms used for the application of GRID spectroscopy are discussed.
Collapse
Affiliation(s)
- A Karmann
- Institut für Festkörperphysik, Friedrich-Schiller-Universitaät, Max-Wien-Platz 1, D-07749 Jena, Germany
| | - W Wesch
- Institut für Festkörperphysik, Friedrich-Schiller-Universitaät, Max-Wien-Platz 1, D-07749 Jena, Germany
| | - B Weber
- Institut für Festkörperphysik, Friedrich-Schiller-Universitaät, Max-Wien-Platz 1, D-07749 Jena, Germany
| | - H G Börner
- Institut Laue-Langevin, BP 156, F-38042 Grenoble, France
| | - M Jentschel
- Institut Laue-Langevin, BP 156, F-38042 Grenoble, France
| |
Collapse
|
27
|
Stritt N, Jolie J, Jentschel M, Börner HG, Doll C. Study of Interatomic Potentials Using the Crystal-GRID Method on Oriented Single Crystals of Ni, Fe, and Cr. J Res Natl Inst Stand Technol 2000; 105:71-80. [PMID: 27551589 PMCID: PMC4878358 DOI: 10.6028/jres.105.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 07/22/1999] [Indexed: 05/29/2023]
Abstract
The Crystal-GRID method is used to study interatomic collisions at low energy in metals and such to probe the repulsive interatomic potential. Line shapes of gamma rays, emitted by the recoiling (59)Ni isotope after thermal neutron capture in Ni single crystals, were measured and compared to results obtained by molecular dynamics simulations of the slowing down. The same procedure is also used for recoiling (57)Fe and (54)Cr atoms in Fe and Cr single crystals, respectively. Different potentials (including several from the embedded atom method) are investigated using the observed fine structure of the line shape which depends on the crystal orientations. From the detailed study of the lineshapes measured in two different orientations, a new potential is then derived for each element. Nuclear state lifetimes for the excited isotopes are also deduced with a higher precision than obtained with standard nuclear techniques.
Collapse
Affiliation(s)
- N Stritt
- Institut de Physique, Universitrolles, CH-1700 Fribourg, Switzerland
| | - J Jolie
- Institut de Physique, Universitrolles, CH-1700 Fribourg, Switzerland
| | - M Jentschel
- Institut Laue Langevin, Av. des Martyrs 156X, 38042 Grenoble CEDEX, France
| | - H G Börner
- Institut Laue Langevin, Av. des Martyrs 156X, 38042 Grenoble CEDEX, France
| | - C Doll
- Institut Laue Langevin, Av. des Martyrs 156X, 38042 Grenoble CEDEX, France
| |
Collapse
|
28
|
Jentschel M, Börner HG, Lehmann H, Doll C. The GRID Technique: Current Status and New Trends. J Res Natl Inst Stand Technol 2000; 105:25-32. [PMID: 27551584 PMCID: PMC4878346 DOI: 10.6028/jres.105.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 07/22/1999] [Indexed: 05/29/2023]
Abstract
In the GRID technique one measures Doppler-broadened line profiles of γ transitions using the high resolution crystal spectrometers GAMS, which are installed at the high flux reactor of the ILL Grenoble. One of the essential applications of this technique is the measurement of nuclear state lifetimes. In the present contribution the precision and the principal limits of the technique are discussed.
Collapse
Affiliation(s)
- M Jentschel
- Institute Laue-Langevin, F-38042 Grenoble, France
| | - H G Börner
- Institute Laue-Langevin, F-38042 Grenoble, France
| | - H Lehmann
- Institute Laue-Langevin, F-38042 Grenoble, France
| | - C Doll
- Technische Universität München, D-85748 Garching, Germany
| |
Collapse
|
29
|
Koch T, Heinig KH, Jentschel M, Börner HG. Study of Interatomic Potentials in ZnS-Crystal-GRID Experiments Versus Ab Initio Calculations. J Res Natl Inst Stand Technol 2000; 105:81-87. [PMID: 27551590 PMCID: PMC4878349 DOI: 10.6028/jres.105.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 07/22/1999] [Indexed: 06/06/2023]
Abstract
Crystal-GRID measurements have been performed with ZnS single crystals. For the first time, an asymmetric Crystal-GRID line shape could be observed. The preliminary data evaluation indicates that the reported lifetime of the 3221 keV level in (33)S is too short. A value of about 60 fs has been found. Due to this "long" lifetime the line shape is much less structured than calculated with the reported lifetime.
Collapse
Affiliation(s)
- T Koch
- Forschungszentrum Rossendorf, D-01314 Dresden, Germany
| | - K H Heinig
- Forschungszentrum Rossendorf, D-01314 Dresden, Germany
| | - M Jentschel
- Institut Laue-Langevin, F-38000 Grenoble, France
| | - H G Börner
- Institut Laue-Langevin, F-38000 Grenoble, France
| |
Collapse
|
30
|
Abstract
The construction of the double-crystal γ-spectrometer GAMS5 was finished recently and the instrument is now operational. Measurements with double flat crystals were carried out and we will report here on the progress concerning the characteristics of the spectrometer.
Collapse
Affiliation(s)
- C Doll
- Physik-Department, Technische Universität München, D-85748 Garching, Germany
| | - H G Börner
- Institut Laue-Langevin, F-38042 Grenoble Cedex 9, France
| | - T von Egidy
- Physik-Department, Technische Universität München, D-85748 Garching, Germany
| | - H Fujimoto
- National Research Laboratory of Metrology, Tsukuba City, Ibaraki 305, Japan
| | - M Jentschel
- Institut Laue-Langevin, F-38042 Grenoble Cedex 9, France
| | - H Lehmann
- Institut Laue-Langevin, F-38042 Grenoble Cedex 9, France
| |
Collapse
|
31
|
Jentschel M, Thess A, Bahr U. Lyapunov exponents and the merger of point-vortex clusters. Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics 1995; 51:5120-5123. [PMID: 9963229 DOI: 10.1103/physreve.51.5120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|