Weakly bound halo breakup of neutron-Li-7 and nucleon-Be-7 on a lead target
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1103/PhysRevC.102.064623 http://hdl.handle.net/11449/209825 |
Resumo: | A comparative analysis of the breakup cross-sections, using continuum discretized coupled-channel approach, is presented for the weakly bound p-wave neutron Li-7 and nucleon-Be-7 projectiles on the Pb-208 target, by investigating the role of interaction effects between the core (Li-7, Be-7) with the target. The extra charge in the B-8 has the effect to increase the Coulomb contribution in the breakup reaction channel. By fixing both projectile ground-state binding energies at 0.137 MeV (B-8 experimental one), with incident energies at the Coulomb barrier and above, we found that the charge difference accounts for over 30% of the neutron-Be-7 breakup cross sections, substantially larger than the corresponding one for proton-Be-7. The large enhancement of the neutron-halo breakup cross-section with respect to the proton-halo case shown in this work is associated to dynamical effects coming from the excitation of the projectile internal continuum due to the nucleon-target and core-target interactions, together with the widely accepted static effects coming from the long wave-function tail of the weakly bound neutron. The interplay between these dynamical and static effects in the energy spectrum of the B-8 fragments is visible, revealed by the peak of the energy distribution pushed to higher relative energies. This follows from the two-body final state interactions between the charged fragments distorted by the three-body reaction environment. |
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Weakly bound halo breakup of neutron-Li-7 and nucleon-Be-7 on a lead targetA comparative analysis of the breakup cross-sections, using continuum discretized coupled-channel approach, is presented for the weakly bound p-wave neutron Li-7 and nucleon-Be-7 projectiles on the Pb-208 target, by investigating the role of interaction effects between the core (Li-7, Be-7) with the target. The extra charge in the B-8 has the effect to increase the Coulomb contribution in the breakup reaction channel. By fixing both projectile ground-state binding energies at 0.137 MeV (B-8 experimental one), with incident energies at the Coulomb barrier and above, we found that the charge difference accounts for over 30% of the neutron-Be-7 breakup cross sections, substantially larger than the corresponding one for proton-Be-7. The large enhancement of the neutron-halo breakup cross-section with respect to the proton-halo case shown in this work is associated to dynamical effects coming from the excitation of the projectile internal continuum due to the nucleon-target and core-target interactions, together with the widely accepted static effects coming from the long wave-function tail of the weakly bound neutron. The interplay between these dynamical and static effects in the energy spectrum of the B-8 fragments is visible, revealed by the peak of the energy distribution pushed to higher relative energies. This follows from the two-body final state interactions between the charged fragments distorted by the three-body reaction environment.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Univ South Africa, Dept Phys, POB 392, ZA-0003 Pretoria, South AfricaInst Tecnol Aeronaut, BR-12228900 Sao Jose Dos Campos, BrazilUniv Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo, BrazilUniv Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo, BrazilCNPq: 308486/2015-3CNPq: 304469-2019-0CNPq: 464898/2014-5FAPESP: 2017/05660-0Amer Physical SocUniv South AfricaInst Tecnol AeronautUniversidade Estadual Paulista (Unesp)Mukeru, B.Frederico, T.Tomio, Lauro [UNESP]2021-06-25T12:30:33Z2021-06-25T12:30:33Z2020-12-28info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article13http://dx.doi.org/10.1103/PhysRevC.102.064623Physical Review C. College Pk: Amer Physical Soc, v. 102, n. 6, 13 p., 2020.2469-9985http://hdl.handle.net/11449/20982510.1103/PhysRevC.102.064623WOS:000602820300004Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhysical Review Cinfo:eu-repo/semantics/openAccess2021-10-23T19:50:02Zoai:repositorio.unesp.br:11449/209825Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T19:50:02Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Weakly bound halo breakup of neutron-Li-7 and nucleon-Be-7 on a lead target |
title |
Weakly bound halo breakup of neutron-Li-7 and nucleon-Be-7 on a lead target |
spellingShingle |
Weakly bound halo breakup of neutron-Li-7 and nucleon-Be-7 on a lead target Mukeru, B. |
title_short |
Weakly bound halo breakup of neutron-Li-7 and nucleon-Be-7 on a lead target |
title_full |
Weakly bound halo breakup of neutron-Li-7 and nucleon-Be-7 on a lead target |
title_fullStr |
Weakly bound halo breakup of neutron-Li-7 and nucleon-Be-7 on a lead target |
title_full_unstemmed |
Weakly bound halo breakup of neutron-Li-7 and nucleon-Be-7 on a lead target |
title_sort |
Weakly bound halo breakup of neutron-Li-7 and nucleon-Be-7 on a lead target |
author |
Mukeru, B. |
author_facet |
Mukeru, B. Frederico, T. Tomio, Lauro [UNESP] |
author_role |
author |
author2 |
Frederico, T. Tomio, Lauro [UNESP] |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Univ South Africa Inst Tecnol Aeronaut Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Mukeru, B. Frederico, T. Tomio, Lauro [UNESP] |
description |
A comparative analysis of the breakup cross-sections, using continuum discretized coupled-channel approach, is presented for the weakly bound p-wave neutron Li-7 and nucleon-Be-7 projectiles on the Pb-208 target, by investigating the role of interaction effects between the core (Li-7, Be-7) with the target. The extra charge in the B-8 has the effect to increase the Coulomb contribution in the breakup reaction channel. By fixing both projectile ground-state binding energies at 0.137 MeV (B-8 experimental one), with incident energies at the Coulomb barrier and above, we found that the charge difference accounts for over 30% of the neutron-Be-7 breakup cross sections, substantially larger than the corresponding one for proton-Be-7. The large enhancement of the neutron-halo breakup cross-section with respect to the proton-halo case shown in this work is associated to dynamical effects coming from the excitation of the projectile internal continuum due to the nucleon-target and core-target interactions, together with the widely accepted static effects coming from the long wave-function tail of the weakly bound neutron. The interplay between these dynamical and static effects in the energy spectrum of the B-8 fragments is visible, revealed by the peak of the energy distribution pushed to higher relative energies. This follows from the two-body final state interactions between the charged fragments distorted by the three-body reaction environment. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-28 2021-06-25T12:30:33Z 2021-06-25T12:30:33Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1103/PhysRevC.102.064623 Physical Review C. College Pk: Amer Physical Soc, v. 102, n. 6, 13 p., 2020. 2469-9985 http://hdl.handle.net/11449/209825 10.1103/PhysRevC.102.064623 WOS:000602820300004 |
url |
http://dx.doi.org/10.1103/PhysRevC.102.064623 http://hdl.handle.net/11449/209825 |
identifier_str_mv |
Physical Review C. College Pk: Amer Physical Soc, v. 102, n. 6, 13 p., 2020. 2469-9985 10.1103/PhysRevC.102.064623 WOS:000602820300004 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Physical Review C |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
13 |
dc.publisher.none.fl_str_mv |
Amer Physical Soc |
publisher.none.fl_str_mv |
Amer Physical Soc |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1797790044352675840 |