Levels in exp 45 K and exp 46 K Excited by the beta Decay of exp 45 Ar and exp 46 Ar

摘要

The nuclides exp 45 Ar and exp 46 Ar have been produced by spallation reactions on vanadium targets at E/sub p/ = 600 MeV. The subsequent decays to exp 45 K and exp 46 K states have been studied. An intensity of 98.6+-0.6% was measured for the beta transition of the 1.94MeV state in exp 46 K. A decay scheme involving 13 beta branches has been established for exp 45 Ar, and the corresponding log values have been deduced. Eleven states are reported for the first time in the decay scheme of exp 45 Ar 1.42, 1.47, 1.72, 2.52, 2.57, 2.75, 3.31, 3.99, 4.04, 4.36 and 4.57MeV. From the lifetime, tau=4.6+-0.6ns, deduced from gamma - gamma delayed coincidences, the angular momentum of the 1081keV level has been established as (7/2) exp - on the basis of the transition strength of its gamma decay. A survey on the 1f/sub 7/2/ implies 1d/sub 3/2/M2 transition in odd K nuclei is presented and the observed hindrance factors are discussed. (Atomindex citation 11:524454)