Microscopic structure of fundamental excitations in N=Z nuclei

Details Microscopic structure of fundamental excitations in N=Z nuclei Microscopic structure of fundamental excitations in N=Z nuclei

2000-11-15

arxiv.org/abs/nucl-th/0011056v1

Phys.Rev.Lett. 87 (2001) 052504

Physics

Nuclear Physics

Nuclear Theory

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.87.052504

Excitation energies of the $T$=1 states in even-even as well as $T$=0 and $T$=1 states in odd-odd $N$=$Z$ nuclei are calculated within the mean-field approach. It is shown that the underlying structure of these states can be determined in a consistent manner only when both isoscalar and isovector pairing collectivity as well as isospin projection, treated within the iso-cranking approximation, are taken into account. In particular, in odd-odd $N$=$Z$ nuclei, the interplay between quasiparticle excitations (relevant for the case of $T$=0 states) and iso-rotations (relevant for the case of $T$=1 states) explains the near-degeneracy of these fundamental excitations.

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