Collective excitations in the continuum
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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2009
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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 |
_version_ |
1768544414233264128 |