Fragmentation of high multipolar vibrational strength in a semiclassical approach
Autor(a) principal: | |
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Data de Publicação: | 1987 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10316/40855 https://doi.org/10.1051/jphyscol:1987207 |
Resumo: | A recent variational approach to the Vlasov equation has shown its ability to describe some splitting of the strength corresponding to nuclear giant resonances, as a consequence of the allowance for rotation Bow. This fragmentation of strength should be understood as a manifestation in a finite system of the phenomenon of Landau damping , which is well-known, for instance, in the electron gas. In this work we extend previous studies, in order to discuss the fragmentation of strength with higher multipolarity. We observe a progressive increase of the fragmentation, so that there are no well-defined collective modes for t > 6 . This conclusion is in anreement with RPA studies, although the loss of coherence for high multipolar modes is not so pronounced in the semiclassical approach as in the quantal case. |
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Fragmentation of high multipolar vibrational strength in a semiclassical approachA recent variational approach to the Vlasov equation has shown its ability to describe some splitting of the strength corresponding to nuclear giant resonances, as a consequence of the allowance for rotation Bow. This fragmentation of strength should be understood as a manifestation in a finite system of the phenomenon of Landau damping , which is well-known, for instance, in the electron gas. In this work we extend previous studies, in order to discuss the fragmentation of strength with higher multipolarity. We observe a progressive increase of the fragmentation, so that there are no well-defined collective modes for t > 6 . This conclusion is in anreement with RPA studies, although the loss of coherence for high multipolar modes is not so pronounced in the semiclassical approach as in the quantal case.Société Française de Physique1987info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/40855http://hdl.handle.net/10316/40855https://doi.org/10.1051/jphyscol:1987207engFIOLHAIS, Carlos ; BRITO, L. – Fragmentation of high multipolar vibrational strength in a semiclassical approach. Journal de Physique Colloques. Les Ulis : Société Française de Physique. ISSN 0449-1947. Vol. 48 (C 2) (1987), p. C2-51-C2-54.ISSN 0449-1947Fiolhais, CarlosBrito, L. deinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2020-05-25T11:11:57Zoai:estudogeral.uc.pt:10316/40855Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:59:58.328291Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Fragmentation of high multipolar vibrational strength in a semiclassical approach |
title |
Fragmentation of high multipolar vibrational strength in a semiclassical approach |
spellingShingle |
Fragmentation of high multipolar vibrational strength in a semiclassical approach Fiolhais, Carlos |
title_short |
Fragmentation of high multipolar vibrational strength in a semiclassical approach |
title_full |
Fragmentation of high multipolar vibrational strength in a semiclassical approach |
title_fullStr |
Fragmentation of high multipolar vibrational strength in a semiclassical approach |
title_full_unstemmed |
Fragmentation of high multipolar vibrational strength in a semiclassical approach |
title_sort |
Fragmentation of high multipolar vibrational strength in a semiclassical approach |
author |
Fiolhais, Carlos |
author_facet |
Fiolhais, Carlos Brito, L. de |
author_role |
author |
author2 |
Brito, L. de |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Fiolhais, Carlos Brito, L. de |
description |
A recent variational approach to the Vlasov equation has shown its ability to describe some splitting of the strength corresponding to nuclear giant resonances, as a consequence of the allowance for rotation Bow. This fragmentation of strength should be understood as a manifestation in a finite system of the phenomenon of Landau damping , which is well-known, for instance, in the electron gas. In this work we extend previous studies, in order to discuss the fragmentation of strength with higher multipolarity. We observe a progressive increase of the fragmentation, so that there are no well-defined collective modes for t > 6 . This conclusion is in anreement with RPA studies, although the loss of coherence for high multipolar modes is not so pronounced in the semiclassical approach as in the quantal case. |
publishDate |
1987 |
dc.date.none.fl_str_mv |
1987 |
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://hdl.handle.net/10316/40855 http://hdl.handle.net/10316/40855 https://doi.org/10.1051/jphyscol:1987207 |
url |
http://hdl.handle.net/10316/40855 https://doi.org/10.1051/jphyscol:1987207 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
FIOLHAIS, Carlos ; BRITO, L. – Fragmentation of high multipolar vibrational strength in a semiclassical approach. Journal de Physique Colloques. Les Ulis : Société Française de Physique. ISSN 0449-1947. Vol. 48 (C 2) (1987), p. C2-51-C2-54. ISSN 0449-1947 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Société Française de Physique |
publisher.none.fl_str_mv |
Société Française de Physique |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799133890022998016 |