2000/11/15 by W. Satuła, Wojciech Satula, R. Wyss +1
Physics and Astronomy · #Advanced Chemical Physics Studies #Nuclear physics research studies #Rare-earth and actinide compounds #nucl-th
paper · pdf · doi:10.1103/physrevlett.87.052504
published as Phys.Rev.Lett. 87 (2001) 052504 · 4 pages, 4 figures
arxiv created 2000/11/15 · openalex publication_date 2001/07/17 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
An extended mean-field model is presented that describes states of different isospin in odd-odd and even-even nuclei. Excitation energies of the T\phantom\rule0ex0ex=\phantom\rule0ex0ex1 states in even-even as well as T\phantom\rule0ex0ex=\phantom\rule0ex0ex0 and T\phantom\rule0ex0ex=\phantom\rule0ex0ex1 states in odd-odd N\phantom\rule0ex0ex=\phantom\rule0ex0exZ nuclei are calculated. It is shown that the structure of these states can be determined in a consistent manner when both isoscalar and isovector pairing collectivity as well as isospin projection (treated here within the isocranking approximation) are taken into account. In particular, in odd-odd N\phantom\rule0ex0ex=\phantom\rule0ex0exZ nuclei, the interplay between quasiparticle excitations (relevant for the case of T\phantom\rule0ex0ex=\phantom\rule0ex0ex0 states) and isorotations (relevant for the case of T\phantom\rule0ex0ex=\phantom\rule0ex0ex1 states) explains the near degeneracy of these states.