Oak Ridge National Laboratory

Physics Division

Physics Division Seminars

Physics Division Seminars bring us speakers on a variety of physics related subjects. Usually these are held in the Building 6008 large Conference Room, at 3:00 pm on the chosen day, but times and locations may vary. For more information, contact our seminar chairman,

Alfredo Galindo-Uribarri
Tel (Office): (865) 574-6124  (FAX): (865) 574-1268

Tue., November 13, 2012, at 3:00 p.m. (refreshments at 2:40 p.m.)

Gyromagnetic ratios in neutron-rich nuclei by the recoil in vacuum technique

A.E. Stuchbery, Australian National University
Building 6008 Conference Room

Several theoretical approaches have predicted the g factors of 21+ states in isotopes near 132Sn [1-4]. However, the experimental data have remained incomplete. In this paper we present new g-factor measurements by the recoil in vacuum (RIV) method [5]. The stable even tin isotopes, neutron-rich 126,128Sn, and tellurium isotopes including neutron-rich semimagic 134Te, have been studied. The experiments were performed at the Holifield Radioactive Ion Beam Facility (HRIBF) by Coulomb exciting ~ 3 MeV/u beams in inverse kinematics on C and Ti targets, and using the CLARION+HyBall arrays to observe the perturbed particle-angular correlations. Demonstrating the power of the technique, the measurements on the radioactive beam of 134Te have sufficient precision to distinguish between the model calculations, which predict g(21+) values ranging from 0.5 to 0.86 [1-3].