Test of a phenomenological model of odd-odd deformed nuclei: An ARC study of 176Lu

An average resonance capture (ARC) study leading to a complete set of Jsup(π) = 2--5- levels in the odd-odd nucleus 176Lu is reported. A phenomenological model for odd-odd nuclei, which is based on the empirical structure of the neighboring odd-mass nuclei and incorporates the effects of certain neutron-proton interactions, is utilized to interpret the data. Cumulative level-number histograms, obtained from this model, are in generally good agreement with the empirical results up to 1100 keV of excitation. The comparison involves a total of 40 predicted rotational bands. Some specific discrepancies arise for 3-, 4- states in a model energy interval near Esub(x) = 700 keV, because of an anomalously-large predicted Gallagher-Moskowski splitting for the 1/2+[411]sub(p)-7/2-[514]sub(n) two-quasiparticle configuration and because of low predicted energies for states involving the 7/2+[404] proton orbit. (orig.)