Studies of gamma-ray transitions in 146Eu

The decay of 146Gd to levels of 146Eu has been studied using high resolution x-ray and γ-ray detectors. γ-γ directional correlation studies, using x and γ-ray Ge(Li) detectors, were made to assign the spins of the low lying states in 146Eu. γ-γ coincidence experiments with two Ge(Li) detectors and between Eu x rays and γ rays were performed to pin down the levels of 146Eu. On the basis of these measurements, Jsup(pi) of 4-, 3-, 2-, and 1- have been assigned respectively to the ground, 115.66, 230.51, and 385.11 keV states in 146Eu. More accurate evaluation of the E2 admixtures in the M1 transitions, 114.85, 115.66, and 154.60 keV, have been obtained. Based on the above results a tentative level scheme for 146Eu has been proposed. (author)