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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Autores principales: Dussel, G.G., Betan, R.I., Liotta, R.J., Vertse, T.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_05562813_v80_n6_p_Dussel
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_05562813_v80_n6_p_Dussel
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spelling todo:paper_05562813_v80_n6_p_Dussel2023-10-03T15:35:06Z Collective excitations in the continuum Dussel, G.G. Betan, R.I. Liotta, R.J. Vertse, T. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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.
format JOUR
author Dussel, G.G.
Betan, R.I.
Liotta, R.J.
Vertse, T.
spellingShingle Dussel, G.G.
Betan, R.I.
Liotta, R.J.
Vertse, T.
Collective excitations in the continuum
author_facet Dussel, G.G.
Betan, R.I.
Liotta, R.J.
Vertse, T.
author_sort Dussel, G.G.
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
url http://hdl.handle.net/20.500.12110/paper_05562813_v80_n6_p_Dussel
work_keys_str_mv AT dusselgg collectiveexcitationsinthecontinuum
AT betanri collectiveexcitationsinthecontinuum
AT liottarj collectiveexcitationsinthecontinuum
AT vertset collectiveexcitationsinthecontinuum
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