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Pesudo V, Borge MJG, Moro AM, Lay JA, Nácher E, Gómez-Camacho J, Tengblad O, Acosta L, Alcorta M, Alvarez MAG, Andreoiu C, Bender PC, Braid R, Cubero M, Di Pietro A, Fernández-García JP, Figuera P, Fisichella M, Fulton BR, Garnsworthy AB, Hackman G, Hager U, Kirsebom OS, Kuhn K, Lattuada M, Marquínez-Durán G, Martel I, Miller D, Moukaddam M, O'Malley PD, Perea A, Rajabali MM, Sánchez-Benítez AM, Sarazin F, Scuderi V, Svensson CE, Unsworth C, Wang ZM. Scattering of the Halo Nucleus ^{11}Be on ^{197}Au at Energies around the Coulomb Barrier. PHYSICAL REVIEW LETTERS 2017; 118:152502. [PMID: 28452556 DOI: 10.1103/physrevlett.118.152502] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Indexed: 06/07/2023]
Abstract
Angular distributions of the elastic, inelastic, and breakup cross sections of the halo nucleus ^{11}Be on ^{197}Au were measured at energies below (E_{lab}=31.9 MeV) and around (39.6 MeV) the Coulomb barrier. These three channels were unambiguously separated for the first time for reactions of ^{11}Be on a high-Z target at low energies. The experiment was performed at TRIUMF (Vancouver, Canada). The differential cross sections were compared with three different calculations: semiclassical, inert-core continuum-coupled-channels and continuum-coupled-channels ones with including core deformation. These results show conclusively that the elastic and inelastic differential cross sections can only be accounted for if core-excited admixtures are taken into account. The cross sections for these channels strongly depend on the B(E1) distribution in ^{11}Be, and the reaction mechanism is sensitive to the entanglement of core and halo degrees of freedom in ^{11}Be.
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Affiliation(s)
- V Pesudo
- Instituto de Estructura de la Materia, CSIC, 28006 Madrid, Spain
- Department of Physics, University of the Western Cape, P/B X17, Bellville ZA-7535, South Africa
- iThemba LABS, Somerset West 7129, South Africa
| | - M J G Borge
- Instituto de Estructura de la Materia, CSIC, 28006 Madrid, Spain
- ISOLDE-EP, CERN, CH-1211 Geneva 23, Switzerland
| | - A M Moro
- Departamento de FAMN, Universidad de Sevilla, 41080 Sevilla, Spain
| | - J A Lay
- Dipartimento di Fisica e Astr. "Galileo Galilei", Univ. di Padova, 35131 Padova, Italy
- INFN, Sezione di Padova, via Marzolo, 8, 35131 Padova, Italy
| | - E Nácher
- Instituto de Estructura de la Materia, CSIC, 28006 Madrid, Spain
| | - J Gómez-Camacho
- Departamento de FAMN, Universidad de Sevilla, 41080 Sevilla, Spain
- CN de Aceleradores (U. Sevilla, J. Andalucía, CSIC), 41092 Sevilla, Spain
| | - O Tengblad
- Instituto de Estructura de la Materia, CSIC, 28006 Madrid, Spain
| | - L Acosta
- Instituto de Física, Universidad Nacional Autónoma de México, A.P. 20-364, Cd.Mx. 01000 Mexico
| | - M Alcorta
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - M A G Alvarez
- Instituto de Física, Universidade de São Paulo, 05508-090 São Paulo, Brazil
| | - C Andreoiu
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6
| | - P C Bender
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - R Braid
- Physics Department, Colorado School of Mines, Golden, Colorado 80401, USA
| | - M Cubero
- Instituto de Estructura de la Materia, CSIC, 28006 Madrid, Spain
- CICANUM, Universidad de Costa Rica, Apdo. 2060 San José, Costa Rica
| | - A Di Pietro
- Laboratori Nazionali del Sud, INFN, via Santa Sofia 62, 95123 Catania, Italy
| | - J P Fernández-García
- Departamento de FAMN, Universidad de Sevilla, 41080 Sevilla, Spain
- Laboratori Nazionali del Sud, INFN, via Santa Sofia 62, 95123 Catania, Italy
- CN de Aceleradores (U. Sevilla, J. Andalucía, CSIC), 41092 Sevilla, Spain
| | - P Figuera
- Laboratori Nazionali del Sud, INFN, via Santa Sofia 62, 95123 Catania, Italy
| | - M Fisichella
- Laboratori Nazionali del Sud, INFN, via Santa Sofia 62, 95123 Catania, Italy
| | - B R Fulton
- Department of Physics, University of York, YO 10 5DD Heslington, York, United Kingdom
| | - A B Garnsworthy
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - G Hackman
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - U Hager
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - O S Kirsebom
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- Department of Physics and Astronomy, Aarhus University, 8000 Aarhus, Denmark
| | - K Kuhn
- Physics Department, Colorado School of Mines, Golden, Colorado 80401, USA
| | - M Lattuada
- Laboratori Nazionali del Sud, INFN, via Santa Sofia 62, 95123 Catania, Italy
- Dipartimento di Fisica e Astronomia, via Santa Sofia 64, 95123 Catania, Italy
| | - G Marquínez-Durán
- Departamento de Ciencias integradas, Universidad de Huelva, 21071 Huelva, Spain
| | - I Martel
- Departamento de Ciencias integradas, Universidad de Huelva, 21071 Huelva, Spain
| | - D Miller
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - M Moukaddam
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - P D O'Malley
- Physics Department, Colorado School of Mines, Golden, Colorado 80401, USA
| | - A Perea
- Instituto de Estructura de la Materia, CSIC, 28006 Madrid, Spain
| | - M M Rajabali
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - A M Sánchez-Benítez
- Departamento de Ciencias integradas, Universidad de Huelva, 21071 Huelva, Spain
| | - F Sarazin
- Physics Department, Colorado School of Mines, Golden, Colorado 80401, USA
| | - V Scuderi
- Laboratori Nazionali del Sud, INFN, via Santa Sofia 62, 95123 Catania, Italy
| | - C E Svensson
- Department of Physics. University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - C Unsworth
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - Z M Wang
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6
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4
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Pesudo V, Borge M, Moro A, Lay J, Nácher E, Gómez-Camacho J, Tengblad O, Acosta L, Alcorta M, Alvarez M, Andreoiu C, Bender P, Braid R, Cubero M, Di Pietro A, Fernández-García J, Figuera P, Fisichella M, Fulton B, Garnsworthy A, Hackman G, Hager U, Kirsebom O, Kuhn K, Lattuada M, Marquínez-Durán G, Martel I, Miller D, Moukaddam M, O'Malley P, Perea A, Rajabali M, Sánchez-Benítez A, Sarazin F, Scuderi V, Svensson C, Unsworth C, Wang Z. Scattering of halo nuclei on heavy targets at energies around the Coulomb barrier: The case of 11Be on 197Au. EPJ WEB OF CONFERENCES 2017. [DOI: 10.1051/epjconf/201716300045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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14
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Cubero M, Fernández-García JP, Rodríguez-Gallardo M, Acosta L, Alcorta M, Alvarez MAG, Borge MJG, Buchmann L, Diget CA, Al Falou H, Fulton BR, Fynbo HOU, Galaviz D, Gómez-Camacho J, Kanungo R, Lay JA, Madurga M, Martel I, Moro AM, Mukha I, Nilsson T, Sánchez-Benítez AM, Shotter A, Tengblad O, Walden P. Do halo nuclei follow Rutherford elastic scattering at energies below the barrier? The case of 11Li. PHYSICAL REVIEW LETTERS 2012; 109:262701. [PMID: 23368554 DOI: 10.1103/physrevlett.109.262701] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2012] [Indexed: 06/01/2023]
Abstract
The first measurement of the elastic scattering of the halo nucleus 11Li and its core 9Li on 208Pb at energies near the Coulomb barrier is presented. The 11Li+208Pb elastic scattering shows a strong reduction with respect to the Rutherford cross section, even at energies well below the barrier and down to very small scattering angles. This drastic change of the elastic differential cross section observed in 11Li+208Pb is the consequence of the halo structure of 11Li, as it is not observed in the elastic scattering of its core 9Li at the same energies. Four-body continuum-discretized coupled-channels calculations, based on a three-body model of the 11Li projectile, are found to explain the measured angular distributions and confirm that the observed reduction is mainly due to the strong Coulomb coupling to the dipole states in the low-lying continuum of 11Li. These calculations suggest the presence of a low-lying dipole resonance in 11Li close to the breakup threshold.
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Affiliation(s)
- M Cubero
- Instituto de Estructura de la Materia CSIC, E28006 Madrid, Spain
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