188Os Low Excited Levels

The -ray spectra of ¹⁸⁸Re decay have been studied by using a compton-suppressed spectrometer and a three parameters --T list coincidence system. Six -rays at 557, 810, 1463, 1867, 1936 and 2022 keV and three levels at 1443, 1936 and 2022 keV are confirmed again. Eight new -rays at 309.60±0.04, 826.90±0.02, 979.29±0.08, 1086.13±0.03, 1103.7±0.4, 1828.2±0.1, 1842.5±0.2, 1982.5±0.2 keV have been identified, three new levels at 309.60, 1828.2 and 1982.5 keV are assigned. The ^–-decay branching ratio is deduced.