Showing papers by "R. Wadsworth published in 1980"
TL;DR: In this paper, the gamma-ray decay scheme of 64Zn has been deduced up to 5.7 MeV excitation by means of gamma- gamma coincidence experiments and n- gamma coincidences experiments.
Abstract: The 61Ni ( alpha ,n gamma ) 64Zn reaction has been studied 8.6 MeV and 9.35 MeV bombarding energies together with the 56Fe(11B, p2n gamma )64Zn reaction at 30 MeV bombarding energy. The gamma -ray decay scheme of 64Zn has been deduced up to 5.7 MeV excitation by means of gamma - gamma coincidence experiments and n- gamma coincidence experiments. Spins and parities have been deduced for most of the high-spin states between 3.1 and 5.7 MeV excitation by means of gamma -ray angular distribution measurements together with gamma -ray linear polarisation measurements. The lifetimes of levels have been measured by DSAM enabling electromagnetic transition rates to be determined for many transitions. The results have been compared with shell-model, cluster-vibration model and interacting boson approximation calculations.
12 citations
TL;DR: In this paper, the mean lifetimes of 83Sr, 84Sr and 85Sr levels have been measured by DSAM and reactions used were (?,n?) and (?, 2n?) with solid krypton targets.
Abstract: Mean lifetimes of 83Sr, 84Sr and 85Sr levels have been measured by DSAM. The reactions used were (?,n?) and (?, 2n?) with solid krypton targets. Angular distribution and linear polarisation measurements yielded several multipole mixing ratios and J? assignments. The J? of the 4.9 h isomer in 85Y is shown to be 2/9+.
12 citations
TL;DR: In this article, the lifetime of levels of high-spin states was determined from DSA and RD measurements and unambiguous assignment of Jpi assignments was deduced from unambiguous Jpi assignment.
Abstract: Twenty excited states below 6.8 MeV and with spins up to J=(9) have been observed in 60Ni in the reaction 56Fe(7Li, p2n gamma ). Lifetimes of levels have been determined from DSA and RD measurements. Gamma-ray angular distribution and linear polarisation measurements have been made and unambiguous Jpi assignments deduced. Several new high-spin states above 4 MeV in excitation are proposed and the results have been compared with the predictions for high-spin states of various theoretical models.
8 citations
TL;DR: In this paper, the level structure of 70Se has been studied with the aid of the 58Ni(14N, pn gamma )70Se and 60Ni(12C, 2n gamma ))70Se reactions.
Abstract: The level structure of 70Se has been studied with the aid of the 58Ni(14N, pn gamma )70Se and 60Ni(12C, 2n gamma )70Se reactions. A decay scheme has been established from results of gamma-gamma and neutron-gamma coincidence experiments. Spin and parity assignments of 2+ (945 keV), 2(+) (1600 keV), 4+ (2039 keV) and 6+ (3003 keV) have been deduced from the results of gamma-ray angular distributions and linear polarisation measurements. Spin restrictions have also been placed on two levels: 3, 5 (3524 keV) and 5, 7 (3915 keV). Comparisons are made with the structure of neighbouring even-even isotopes and their energy level systematics.
6 citations