Microscopic Structure of Fundamental Excitations in <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi mathvariant="italic">N</mi><mspace></mspace><mo>=</mo><mspace></mspace><mi mathvariant="italic">Z</mi></math></span> Nuclei

Wojciech Satuła; Ramon Wyss

doi:10.1103/PhysRevLett.87.052504

Microscopic Structure of Fundamental Excitations in $N = Z$ Nuclei

Wojciech Satuła and Ramon Wyss

Phys. Rev. Lett. 87, 052504 – Published 17 July 2001

Abstract

An extended mean-field model is presented that describes states of different isospin in odd-odd and even-even nuclei. Excitation energies of the $T = 1$ states in even-even as well as $T = 0$ and $T = 1$ states in odd-odd $N = Z$ 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 $N = Z$ nuclei, the interplay between quasiparticle excitations (relevant for the case of $T = 0$ states) and isorotations (relevant for the case of $T = 1$ states) explains the near degeneracy of these states.

Received 1 December 2000

DOI:https://doi.org/10.1103/PhysRevLett.87.052504

Authors & Affiliations

Wojciech Satuła^1,2 and Ramon Wyss¹

¹Royal Institute of Technology, Frescativ. 24, S-104 05 Stockholm, Sweden
²Institute of Theoretical Physics, Warsaw University, ul. Hoża 69, PL-00 681, Warsaw, Poland