Electromagnetic transition strengths in the transitional doubly odd nucleus 198Au

Abstract

The half-lives of low-lying levels in 198Au are determined by means of delayed coincidences and generalized controid-shift analysis in the (n, γ) reaction as follows: T 1 2 (3 +, 381.2 keV) = 2.3(2), ns , T 1 2 (1 −, 192.9 keV) = 0.7(2) ns , T 1 2 (1 −, 247.6 keV) = 0.4(1) ns , T 1 2 (4 −, 215.0 keV) = 0.4(2) ns . In some cases, decompositions of complex distributions were carried out in order to determine the corresponding time centroids. Upper limits are derived for the lifetimes of several other low-lying levels. The deduced electromagnetic transition probabilities B( σL) are compared to results of a new IBFFM calculation.