HAL : in2p3-00447985, version 1

arXiv : 1001.2979

DOI : 10.1016/j.physletb.2010.01.032

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Physics Letters B 685 (2010) 55-58

Pair-vibrational states in the presence of neutron-proton pairing

R.R. Chasman1, P. Van Isacker2

(2010)

Pair vibrations are studied for a Hamiltonian with neutron-neutron, proton-proton and neutron-proton pairing. The spectrum is found to be rich in strongly correlated, low-lying excited states. Changing theratio of diagonal to off-diagonal pairing matrix elements is found to have a large impact on the excited-state spectrum. The variational configuration interaction (VCI) method, used to calculate the excitation spectrum, is found to be in very good agreement with exact solutions for systems with large degeneracies having equal $T=0$ and $T=1$ pairing strengths.

1 :	Physics Division, Argonne National Laboratory
2 :	GANIL - Grand Accélérateur National d'Ions Lourds

Thème(s)

:

Physique/Physique Nucléaire Théorique

Mot(s)-clé(s) : N-P Pairing – Excited States – Variational Configuration Interaction Method

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Contributeur : Michel Lion <>

Déposé pour le compte de : Pieter Van Isacker <>

Soumis le : Lundi 18 Janvier 2010, 09:48:38

Dernière modification le : Mardi 9 Février 2010, 09:09:45