Abstract
Parity doublet states and alternating parity bands in nuclei observed in (α,3nγ) reactions at =37 and 35 MeV are presented here. Nineteen new transitions in and sixteen in have been observed in singles and γ-γ-t-r.f. coincidence experiments. Four alternating parity bands in and two in characterized by simplex quantum numbers are reported. The observed level schemes are interpreted in terms of octupole deformation. The energy difference due to parity splitting, collective rotational parameters, quasiparticle Routhians, single particle angular momentum alignments of bands with simplex quantum number s=±i in and with s=-i in have been calculated from the experimental results. From the E1, E2 branching ratios, the electric dipole moments are deduced to be 〈〉=0.19±0.08 e fm for and 〈〉=0.36±0.11 e fm for . The parameter , a function of the symmetry energy coefficient, has been estimated for from the liquid drop model of Strutinsky for deformed nucleus, and has been found to be =0. fm.
- Received 25 May 1993
DOI:https://doi.org/10.1103/PhysRevC.49.650
©1994 American Physical Society