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Magnetic moments of the 2/sub 1//sup +/ states in /sup 146,148/Ce

Journal Article · · Phys. Rev. C; (United States)
The g factors of the 2/sub 1//sup +/ states in /sup 146,148/Ce have been measured using the time integral perturbed angular correlation technique. The levels were populated by the radioactive decay of mass-separated /sup 146,148/La which was produced by thermal neutron fission of /sup 235/U. The measured g(2/sub 1//sup +/) values are 0.24 +- 0.05 and 0.37 +- 0.06 for /sup 146/Ce and /sup 148/Ce, respectively. The results are interpreted as a probe of the number of valence protons participating in the collective motion. Data for Ba, Ce, Nd, and Sm nuclei in the region of N = 90 show a distinct change in the value of g(2/sub 1//sup +/) as the number of neutrons increases from 86 to 90. This change is attributed to the effects of the strong interaction between the ..pi..h/sub 11/2/ and ..nu..h/sub 9/2/ orbits which causes a gradual dissipation of the Z = 64 subshell gap.
Research Organization:
Brookhaven National Laboratory, Upton, New York 11973
OSTI ID:
6096291
Journal Information:
Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 33:3; ISSN PRVCA
Country of Publication:
United States
Language:
English

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