Womble Pc

Weak coupling in [sup 143]Nd

High-spin states of [sup 143]Nd have been studied using the [sup 130]Te([sup 18]O,5[ital n]) reaction at 85 MeV. The yrast states observed up to a tentatively assigned spin of 45/2 can be described in a remarkably simple way by the weak coupling of an [ital f][sub 7/2] neutron to the [sup 142]Nd core nucleus. Our results demonstrate that [sup 143]Nd is one of the best known examples of weak coupling at high angular momentum.

Possibleπ(h 11 2/3 g 7 2/−1 ) states in144Nd

High spin states of the nucleus144Nd have been studied using the techniques of gamma-ray spectroscopy and the130Te(18O,4n) reaction at 85 MeV. It is suggested that a sequence of states having J=17–24 arises from the coupling of the h12/3g72−1 proton configuration to the f72/2 and f7/2h9/2 neutron configurations.

Role ofh11/2 protons in144Pm

High spin states of the N=83 nucleus144Pm have been studied using the reaction130Te(19F,5n) and the techniques of gamma-ray and conversion electron spectroscopy. Empirical shell model calculations indicate that three observed states with J=14, 15 and 16 haveπh112/2 configurations. This is the first observation ofπh112/2 states in a Z<64, N=83 nucleus.

Tests of Octupole Band Structures

Experimental investigations of possible octupole band structures in 74Se and 144Nd are reported. These investigations used the techniques of γ‐ray spectroscopy and proton inelastic scattering.