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arXiv · 1409.4884

Proton-neutron pairing vibrations in N=Z nuclei: Precursory soft mode of isoscalar pairing condensation

Kenichi Yoshida
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Abstract

L=0 proton-neutron ($pn$) pair-addition and pair-removal strengths in $^{40}$Ca and $^{56}$Ni are investigated by means of the $pn$ particle-particle random-phase approximation employing a Skyrme energy-density functional. It is found that the collectivity of the lowest $J^π= 1^+$ state in the adjacent odd-odd nuclei becomes stronger as the strength of the isoscalar (T=0) pairing interaction increases. The results suggest the emergence of the T=0 $pn$-pairing vibrational mode as a possible critical phenomenon toward the T=0 pairing condensation.

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Kenichi Yoshida. 2014-09-17. Proton-neutron pairing vibrations in N=Z nuclei: Precursory soft mode of isoscalar pairing condensation. https://doi.org/10.1103/physrevc.90.031303

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