Experimental and theoretical studies of odd-odd deformed nuclei
Conference
·
OSTI ID:5850783
The application of a simple semi-empirical model is discussed in terms of interpreting experimental nuclear structure data for twelve of the best characterized odd-odd deformed nuclei. An essential part of this modeling is to calculate values for the Gallagher-Moszkowski splitting and Newby shifts, the observables that arise from the n-p residual interaction in odd-odd nuclei. Assumptions regarding the form for this n-p force are traced historically, beginning with a delta force and including finite-range central forces of various descriptions, the necessary introduction of a tensor force to allow proper calculation of certain Newby shifts, and the use of the Skyrme III interaction to determine the ingredients of a Bohr-Mottelson unified-model description through the Hartree-Fock-Bogolyubov approximation. The predictive power of a favored form of the n-p force, one that produced a remarkably good fit to E(G-M) data in 1976, is examined in light of experimental data obtained since its formulation. A data set of 42 experimentally determined Newby shifts has been reviewed as to the reliability of each entry. Exceptions to a recently proposed rule for the a priori determination of the sign of a Newby shift are discussed. Evidence is presented for the existence of odd-even staggering in the rotational spacings of many K/sup /minus// bands (with K>0). By use of Coriolis-coupling calculations, it has been possible to reproduce the odd-even staggering observed in some of the K/sup /minus// rotational bands of 168Tm, 176Lu, 182Ta, and 182Re. 26 refs., 2 figs., 3 tabs.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5850783
- Report Number(s):
- UCRL-101175; CONF-8906168-3; ON: DE89016512
- Country of Publication:
- United States
- Language:
- English
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