Quadrupole pairing interaction and signature inversion

• The signature inversion in the pi h(11/2) x vh(11/2) rotational bands of the odd-odd Cs and La isotopes and the pi h(11/2) x vi(13/2) bands of the odd-odd Tb, Ho and Tm nuclei is investigated using pairing and deformation self-consistent mean-field calculations, The model can rather satisfactorily account for the anomalous signature splitting provided that spin assignments in some of the bands are revised. Our calculations show that signature inversion can appear already at axially symmetric shapes. It is found that this is due to the contribution of the (lambda mu) = (22) component of the quadrupole-pairing interaction to the mean-field potential.

Nyckelord

quadrupole pairing interaction

signature inversion

rotational band

TRS calculations

high-spin states

odd-odd nuclei

residual interaction

rotational bands

triaxiality

proton

configurations

quasiparticle

region

shape

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ref (ämneskategori)

art (ämneskategori)