Rotations in Isospace: A Doorway to the Understanding of Neutron-Proton Superfluidity 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.86.4488

Rotations in Isospace: A Doorway to the Understanding of Neutron-Proton Superfluidity in $N = Z$ Nuclei

Wojciech Satuła and Ramon Wyss

Phys. Rev. Lett. 86, 4488 – Published 14 May 2001

Abstract

The $T = 2$ excitations in even-even $N = Z$ nuclei are calculated within the isospin cranked mean-field approach. The response of pairing correlations to rotation in isospace is investigated. Whereas the isovector pairing rather modestly modifies the single-particle moment of inertia in isospace, the isoscalar pairing strongly reduces its value. This reduction of the isomoments of inertia with respect to its rigid body value is a strong indicator of collective isoscalar pairing correlations. These results are further generalized yielding beautiful analogies between the role of isovector pairing for the case of spatial rotations and the role of isoscalar pairing for the case of isorotations.

Received 13 October 2000

DOI:https://doi.org/10.1103/PhysRevLett.86.4488

Authors & Affiliations

Wojciech Satuła^1,2 and Ramon Wyss¹

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