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Heine M, Fruet G, Courtin S, Jenkins D, Adsley P, Brown A, Canavan R, Catford W, Charon E, Curien D, Della Negra S, Duprat J, Hammache F, Lesrel J, Lotay G, Meyer A, Monpribat E, Montanari D, Morris L, Moukaddam M, Nippert J, Podolyák Z, Regan P, Ribaud I, Richer M, Rudigier M, Shearman R, de Séréville N, Stodel C. Direct Measurement of Carbon Fusion at Astrophysical Energies with Gamma-Particle Coincidences. EPJ Web Conf 2022. [DOI: 10.1051/epjconf/202226001004] [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
We present 12C+12C direct fusion measurements with STELLA UKFATIMA, that reach into the region of astrophysics interest relevant to massive stars (M⊙ ≈ 25) using self-supporting thin rotating carbon foils [1]. We demonstrate that detecting gammas and light charged particles in coincidence with nanosecond timing is key for effective background reduction achieving reliable measurements in the sub-nanobarn range. We give details about core developments of the detection apparatus as well as the coincidence-analysis procedure of low count statistics. The present data largely follows the phenomenological hindrance interpolation and shows indication for resonant behaviour at the lowest energy explored.
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Fruet G, Courtin S, Heine M, Jenkins DG, Adsley P, Brown A, Canavan R, Catford WN, Charon E, Curien D, Della Negra S, Duprat J, Hammache F, Lesrel J, Lotay G, Meyer A, Montanari D, Morris L, Moukaddam M, Nippert J, Podolyák Z, Regan PH, Ribaud I, Richer M, Rudigier M, Shearman R, de Séréville N, Stodel C. Advances in the Direct Study of Carbon Burning in Massive Stars. Phys Rev Lett 2020; 124:192701. [PMID: 32469543 DOI: 10.1103/physrevlett.124.192701] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 09/27/2019] [Accepted: 02/21/2020] [Indexed: 06/11/2023]
Abstract
The ^{12}C+^{12}C fusion reaction plays a critical role in the evolution of massive stars and also strongly impacts various explosive astrophysical scenarios. The presence of resonances in this reaction at energies around and below the Coulomb barrier makes it impossible to carry out a simple extrapolation down to the Gamow window-the energy regime relevant to carbon burning in massive stars. The ^{12}C+^{12}C system forms a unique laboratory for challenging the contemporary picture of deep sub-barrier fusion (possible sub-barrier hindrance) and its interplay with nuclear structure (sub-barrier resonances). Here, we show that direct measurements of the ^{12}C+^{12}C fusion cross section may be made into the Gamow window using an advanced particle-gamma coincidence technique. The sensitivity of this technique effectively removes ambiguities in existing measurements made with gamma ray or charged-particle detection alone. The present cross-section data span over 8 orders of magnitude and support the fusion-hindrance model at deep sub-barrier energies.
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Affiliation(s)
- G Fruet
- IPHC, Université de Strasbourg, Strasbourg F-67037, France
- CNRS, UMR7178, Strasbourg F-67037, France
| | - S Courtin
- IPHC, Université de Strasbourg, Strasbourg F-67037, France
- CNRS, UMR7178, Strasbourg F-67037, France
- USIAS/Université de Strasbourg, Strasbourg F-67083, France
| | - M Heine
- IPHC, Université de Strasbourg, Strasbourg F-67037, France
- CNRS, UMR7178, Strasbourg F-67037, France
| | - D G Jenkins
- University of York, York YO10 5DD, United Kingdom
| | - P Adsley
- Institut de Physique Nucléaire, CNRS/IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
| | - A Brown
- University of York, York YO10 5DD, United Kingdom
| | - R Canavan
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
- National Physical Laboratory, Teddington, Middlesex TW110 LW, United Kingdom
| | - W N Catford
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - E Charon
- NIMBE, CEA, CNRS, Université Paris-Saclay, CEA Saclay F-91191 Gif sur Yvette, France
| | - D Curien
- IPHC, Université de Strasbourg, Strasbourg F-67037, France
- CNRS, UMR7178, Strasbourg F-67037, France
| | - S Della Negra
- Institut de Physique Nucléaire, CNRS/IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
| | - J Duprat
- Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris Sud, UMR 8609-CNRS/IN2P3, 91405 Orsay, France
| | - F Hammache
- Institut de Physique Nucléaire, CNRS/IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
| | - J Lesrel
- Institut de Physique Nucléaire, CNRS/IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
| | - G Lotay
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - A Meyer
- Institut de Physique Nucléaire, CNRS/IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
| | - D Montanari
- IPHC, Université de Strasbourg, Strasbourg F-67037, France
- CNRS, UMR7178, Strasbourg F-67037, France
- USIAS/Université de Strasbourg, Strasbourg F-67083, France
| | - L Morris
- University of York, York YO10 5DD, United Kingdom
| | - M Moukaddam
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - J Nippert
- IPHC, Université de Strasbourg, Strasbourg F-67037, France
- CNRS, UMR7178, Strasbourg F-67037, France
| | - Zs Podolyák
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - P H Regan
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
- National Physical Laboratory, Teddington, Middlesex TW110 LW, United Kingdom
| | - I Ribaud
- Institut de Physique Nucléaire, CNRS/IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
| | - M Richer
- IPHC, Université de Strasbourg, Strasbourg F-67037, France
- CNRS, UMR7178, Strasbourg F-67037, France
| | - M Rudigier
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - R Shearman
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
- National Physical Laboratory, Teddington, Middlesex TW110 LW, United Kingdom
| | - N de Séréville
- Institut de Physique Nucléaire, CNRS/IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
| | - C Stodel
- GANIL, CEA/DSM-CNRS/IN2P3, Caen F-14076, France
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Courtin S, Jiang C, Fruet G, Heine M, Jenkins D, Adsley P, Morris L, Regan P, Rudigier M, Montanari D, Della Negra S, de Séréville N, Haas F, Hammache F, Kirsebom O, Lesrel J, Meyer A, Montanari D, Auranen K, Avila M, Ayangeakaa A, Back B, Bottoni S, Carpenter M, Dickerson C, DiGiovine B, Greene J, Henderson D, Hoffman C, Janssens R, Kay B, Kuvin S, Lauritsen T, Pardo R, Rehm K, Santiago-Gonzalez D, Sethi J, Seweryniak D, Talwar R, Ugalde C, Zhu S, Deibel C, Marley S, Bourgin D, Stodel C, Lefebvre-Schuhl A, Almaraz-Calderon S, Fang X, Tang X, Alcorta M, Bucher B, Albers M, Bertone P. Cross section measurements in the 12C+12C system. EPJ Web Conf 2017. [DOI: 10.1051/epjconf/201716501015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Heine M, Courtin S, Fruet G, Jenkins D, Montanari D, Adsley P, Beck C, Della Negra S, Dené P, Haas F, Hammache F, Heitz G, Kirsebom O, Krauth M, Lesrel J, Meyer A, Morris L, Regan P, Richer M, Rudigier M, de Séréville N, Stodel C. Sub-barrier fusion cross section measurements with STELLA. EPJ Web Conf 2017. [DOI: 10.1051/epjconf/201716501029] [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
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Martinet G, Díaz-Tendero S, Chabot M, Wohrer K, Della Negra S, Mezdari F, Hamrita H, Désesquelles P, Padellec AL, Gardés D, Lavergne L, Lalu G, Grave X, Clavelin JF, Hervieux PA, Alcamí M, Martín F. Fragmentation of highly excited small neutral carbon clusters. Phys Rev Lett 2004; 93:063401. [PMID: 15323628 DOI: 10.1103/physrevlett.93.063401] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2004] [Indexed: 05/24/2023]
Abstract
We present a combined experimental and theoretical study of fragmentation of small Cn clusters (n = 5,7,9) produced in charge transfer collisions of fast (nu = 2.6 a.u.) singly charged Cn+ clusters with He. Branching ratios for all possible fragmentation channels have been measured. Comparison with microcanonical Metropolis Monte Carlo simulations based on quantum chemistry calculations allows us to determine the energy distribution of the excited clusters just after the collision.
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Affiliation(s)
- G Martinet
- IPN, Université Paris-Sud, 91406 Orsay Cedex, France
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