학술논문
g factor measurements of μs isomeric states in neutron-rich nuclei around 68Ni produced in projectile-fragmentation reactions
Document Type
Article
Author
Georgiev, G; Neyens, G; Hass, M; Balabanski, D L; Bingham, C; Borcea, C; Coulier, N; Coussement, R; Daugas, J M; France, G De; Santos, F de Oliveira; Górska, M; Grawe, H; Grzywacz, R; Lewitowicz, M; Mach, H; Matea, I; Page, R D; Pfützner, M; Penionzhkevich, Yu E; Podolyák, Z; Regan, P H; Rykaczewski, K; Sawicka, M; Smirnova, N A; Sobolev, Yu G; Stanoiu, M; Teughels, S; Vyvey, K
Source
Journal of Physics G: Nuclear and Particle Physics; December 1, 2002, Vol. 28 Issue: 12 p2993-3006, 14p
Subject
Language
ISSN
09543899; 13616471
Abstract
We report the first g factor measurement on microsecond isomers of neutron-rich nuclei produced in projectile-fragmentation reactions at intermediate energies. The nuclides in the vicinity of 68Ni were produced and spin oriented following the fragmentation of a 76Ge, 61.4 MeV u−1 beam at GANIL. The LISE spectrometer was used to select the nuclei of interest. The time-dependent perturbed angular distribution (TDPAD) method was applied in combination with the heavy-iongamma correlation technique to measure the g factors of 69mCu (Jπ &equal; 13/2+, T1/2 &equal; 350 ns) and 67mNi (Jπ &equal; 9/2+, T1/2 &equal; 13.3 μs). Specific details of the experimental technique and the comparison of the results (|g(69mCu)| &equal; 0.225(25) and |g(67mNi)| &equal; 0.125(6)) with theoretical calculations are discussed. These results provide another indication of the importance of proton excitations across the Z &equal; 28 shell gap.