The doubly odd nucleus 144Pm. II

Results from the proton transfer reactions, 143Nd(3He,d) and 143Nd(α,t), and γ-ray studies have been used to characterize the levels in 144Pm. The spins, (3He,d)/(α,t) cross section ratios and γ-ray branching ratios for the states below 600 keV can be interpreted consistently in terms of the mixed π2dsub(5/2)γ2fsub(7/2) and π1gsub(7/2)γ2fsub(7/2) shell-model configurations. The γ-ray intensity ratios measured in the 141Pr(α,nγ) and 144Nd(p,nγ) reactions exhibit a strong and smooth dependence on level spin. Theoretical calculations employing a residual surface delta interaction are in reasonable agreement with the twelve observed low-lying negative parity states. The eight positive parity states between 841 and 1451 keV are presumed to arise from the π1hsub(11/2)γ2fsub(7/2) configuration. (Auth.)