Structure of the Odd-Odd Nucleus ~188Re

摘要

Thermal neutron capture gamma-ray spectra for ~187Re(n,y)~188Re reaction were mea-sured. Singles and coincidence spectra were detected in order to develop the level scheme. Theevaluation is in progress, of which the first results are obtained from the analysis of coincidencespectra, allowing to check the level scheme below 500 keV excitation energy. Seven low-energynegative parity bands are developed in order to find better energies for rotational levels. With agood confidence, a few positive parity bands are developed as well. Rotor plus two quasiparticlemodel calculations, employing effective matrix element method are performed for the system of sixnegative parity rotational bands.