Collective excitations in the continuum

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Pairing (particle-particle) giant resonances are analyzed within a shell-model formalism in the complex energy plane with the aim of understanding why they have not been observed so far. A comparison is made with the equivalent particle-hole mode by applying the formalism to the analysis of the well...

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Detalles Bibliográficos
Autores principales: Dussel, Guillermo Gaspar, Betan, Rodolfo Mohamed
Publicado: 2009
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562813_v80_n6_p_Dussel
http://hdl.handle.net/20.500.12110/paper_05562813_v80_n6_p_Dussel
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_05562813_v80_n6_p_Dussel
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spelling paper:paper_05562813_v80_n6_p_Dussel2023-06-08T15:41:57Z Collective excitations in the continuum Dussel, Guillermo Gaspar Betan, Rodolfo Mohamed Pairing (particle-particle) giant resonances are analyzed within a shell-model formalism in the complex energy plane with the aim of understanding why they have not been observed so far. A comparison is made with the equivalent particle-hole mode by applying the formalism to the analysis of the well-understood particle-hole giant resonance. It is found that because of the proper treatment of the continuum intrinsic to the formalism, giant pairing resonances lie much higher than previously predicted and that some of them may be too wide to be observed, whereas others are meaningful excitations. For these, new experimental searches are proposed. © 2009 The American Physical Society. Fil:Dussel, G.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Betan, R.I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562813_v80_n6_p_Dussel http://hdl.handle.net/20.500.12110/paper_05562813_v80_n6_p_Dussel
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description Pairing (particle-particle) giant resonances are analyzed within a shell-model formalism in the complex energy plane with the aim of understanding why they have not been observed so far. A comparison is made with the equivalent particle-hole mode by applying the formalism to the analysis of the well-understood particle-hole giant resonance. It is found that because of the proper treatment of the continuum intrinsic to the formalism, giant pairing resonances lie much higher than previously predicted and that some of them may be too wide to be observed, whereas others are meaningful excitations. For these, new experimental searches are proposed. © 2009 The American Physical Society.
author Dussel, Guillermo Gaspar
Betan, Rodolfo Mohamed
spellingShingle Dussel, Guillermo Gaspar
Betan, Rodolfo Mohamed
Collective excitations in the continuum
author_facet Dussel, Guillermo Gaspar
Betan, Rodolfo Mohamed
author_sort Dussel, Guillermo Gaspar
title Collective excitations in the continuum
title_short Collective excitations in the continuum
title_full Collective excitations in the continuum
title_fullStr Collective excitations in the continuum
title_full_unstemmed Collective excitations in the continuum
title_sort collective excitations in the continuum
publishDate 2009
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562813_v80_n6_p_Dussel
http://hdl.handle.net/20.500.12110/paper_05562813_v80_n6_p_Dussel
work_keys_str_mv AT dusselguillermogaspar collectiveexcitationsinthecontinuum
AT betanrodolfomohamed collectiveexcitationsinthecontinuum
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