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Coherence features of the spin-aligned neutron-proton pair coupling scheme | | C. Qi
; J. Blomqvist
; T. Bäck
; B. Cederwall
; A. Johnson
; R.J. Liotta
; R. Wyss
; | | Date: |
17 Feb 2012 | | Abstract: | The seniority scheme has been shown to be extremely useful for the
classification of nuclear states in semi-magic nuclei. The neutron-proton
($np$) correlation breaks the seniority symmetry in a major way. As a result,
the corresponding wave function is a mixture of many components with different
seniority quantum numbers. In this contribution we show that the $np$
interaction may favor a new kind of coupling in $N=Z$ nuclei, i.e., the
so-called isoscalar spin-aligned $np$ pair mode. Shell model calculations
reveal that the ground and low-lying yrast states of the $N = Z$ nuclei
$^{92}$Pd and $^{96}$Cd may mainly be built upon such spin-aligned $np$ pairs
each carrying the maximum angular momentum $J = 9$ allowed by the shell
$0g_{9/2}$ which is dominant in this nuclear region. | | Source: | arXiv, 1202.3916 | | Services: | Forum | Review | PDF | Favorites | |
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