Energy levels of 174 Yb populated in the decay of 174 Tm

摘要: The decay of the174Tm activity has been studied with Ge(Li) detectors and a Ge(Li)—NaI(Tl) coincidence arrangement. Gamma ray energies relative intensities were determined. Five new gamma transitions are reported, four which have placed in the scheme addition to previously observed but unplaced 1305 keV transition. energy levels at 1557.7, 1762.1, 1781.1, 1877.5 2050.1 not earlier reported be populated of174Tm suggested. Some spin parity assignments proposed intrinsic structure several states is discussed terms two quasi-particle excitations. For half-life value 5.4±0.1 min was measured.