THE ∞∞-COINCIDENCE MEASUREMENTS OF 166 Ho FROM THE (n,∞) REACTION

Levels of 166 Ho were studied using thermal and average resonance neutron capture and with the (d,p) and (d, 3 He) reactions. We have devoted a large efiort to the measurements of the ∞∞-coincidence spectra in the broad energy region 50 { 6243 keV. Based on these data and those of earlier studies, the levels are grouped into 23 rotational bands. Among them are 6 new ones. The results are in good agreement with the semiempirical and quasiparticle-phonon model, where Coriolis and residual interactions are taken into account. Details of model interpretation have been presented in a previously published paper.