Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2001-04-04
Acta Phys.Polon. B32 (2001) 2441-2456
Physics
Nuclear Physics
Nuclear Theory
Invited talk presented by WS at the Int. Conf. High Spin 2001, Feb. 6-11, 2001, Warszawa, Poland; contains 17 LaTeX pages incl
Scientific paper
Excitation spectra of T=0,1,2 states in even-even (e-e) and odd-odd (o-o) N=Z nuclei are analyzed within a mean-field based model involving isovector and isoscalar pairing interactions and the iso-cranking formalism applied to restore approximately isospin symmetry. It is shown that T=0 states in o-o and T=1 states in e-e nuclei correspond to two-quasiparticle, time-reversal symmetry breaking excitations since their angular momenta are different than zero. On the other hand the lowest T=2 states in e-e and T=1 states in o-o nuclei, which both are similar in structure to their even-even isobaric analogue states, are described as e-e type vaccua excited (iso-cranked) in isospace. It appears that in all cases isoscalar pairing plays a crucial role in restoring the proper value of the inertia parameter in isospace.
Satula Wojciech
Wyss Ramon A.
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