Study of yrast band in 155Tm

The nucleus 155Tm has been studied by a detailed in-beam gamma spectroscopy following the reaction 144Sm(14N, 3n)155Tm, at a beam energy, , using a Compton suppressed gamma detector array. More than 25 new gamma transitions have been placed in the proposed scheme and the latter has been extended upto a spin-parity of (51/2−) at an excitation energy ∼ 6 MeV.