Coexistence of quartets and pairs in even-even $N>Z$ nuclei

Abstract

We analyse the structure of the ground states of even-even $N>Z$ nuclei with nucleons moving in the same major shell and interacting via realistic two-body forces of shell-model type. We express the ground states of these nuclei as a product of a quartet term, which represents the $N=Z$ subsystem, and a pair condensate built with the excess neutrons. The accuracy of this approximation is discussed for nuclei with valence nucleons in the $sd$ and $pf$ major shells.

9 pages, 4 figures

References in corpus (4)

• Quartetting in odd-odd self-conjugate nuclei
• $\alpha$-like quartetting in the excited states of proton-neutron pairing Hamiltonians
• Band-like structures and quartets in deformed N=Z nuclei
• Excited states of zero seniority based on a pair condensate

Cited by in corpus (2)

• Spin-Triplet Pairing in Heavy Nuclei is Stable Against Deformation
• Quartet correlations near the surface of $N=Z$ nuclei