Pairing strength in neutron-rich isotopes of Zr

J. L. Durell; W. R. Phillips; C. J. Pearson; J. A. Shannon; W. Urban; B. J. Varley; N. Rowley; K. Jain; I. Ahmad; C. J. Lister; L. R. Morss; K. L. Nash; C. W. Williams; N. Schulz; E. Lubkiewicz; M. Bentaleb

doi:10.1103/PhysRevC.52.R2306

Rapid Communication

Pairing strength in neutron-rich isotopes of Zr

J. L. Durell, W. R. Phillips, C. J. Pearson, J. A. Shannon, W. Urban, B. J. Varley, N. Rowley, K. Jain, I. Ahmad, C. J. Lister, L. R. Morss, K. L. Nash, C. W. Williams, N. Schulz, E. Lubkiewicz, and M. Bentaleb

Phys. Rev. C 52, R2306(R) – Published 1 November 1995

Abstract

Rotational bands based on two-quasi-neutron excitations have been observed for the first time in neutron-rich isotopes. The bandhead excitation energies have been used within the BCS model to determine the strength G of the neutron pairing interaction. Values of G=0.21 and 0.19 MeV have been obtained for ${}^{100}{Zr}$ and ${}^{102}{Zr}$ , respectively. For these neutron-rich nuclei the strength G is thus close to 20/A MeV, smaller than the value 23/A MeV used to describe even-even nuclei near stability in this region.

Received 1 May 1995

DOI:https://doi.org/10.1103/PhysRevC.52.R2306

Authors & Affiliations

J. L. Durell, W. R. Phillips, C. J. Pearson, J. A. Shannon, W. Urban, and B. J. Varley

Department of Physics and Astronomy, University of Manchester, M13 9PL, United Kingdom

N. Rowley

Department of Physics and Astronomy, University of Manchester, M13 9PL, United Kingdom
Department of Physics, University of Surrey, Guildford, GU2 5XH, United Kingdom

K. Jain