On 161Er, 163Er and 165Er excited states

Investigations of spectra of internal-conversion electrons and γ-rays in the sup(161, 1163 and65)Tm decay have been carried out on precision β-spectrographs and γ-spectrometers. Basing on the obtained intensity and the multipole composition of γ-transitions in the lifetimes of a number of rotational states of sup(161,163,165)Er have been calculated. Calculations of probabilities for γ-transition, deexciting the states have been also carried out. M1-, E2- and E1-transitions between the rotational bands are decelerated relative to the corresponding interrotational transitions. For the majority of considered transitions the Alagui rules are considerably violated which testifies to strong configurational mixing of the states investigated with the Coriolis interaction In the 165Er nucleus on the example of the M1-transitions 307,356 and 384 keV at ΔK=2 the K-exclusion manifests itself: the probabilities of K-forbidden transitions 100 times less than the probabilities of corresponding allowed transitions at ΔK=1 deexciting the same states