Unknown β delayed proton precursor 121 Ce was produced via the reaction of 92 Mo( 32 S, 3n), and identified by an He jet fast tape transport system with "P γ" coincidence measurements. The half life of 121...Unknown β delayed proton precursor 121 Ce was produced via the reaction of 92 Mo( 32 S, 3n), and identified by an He jet fast tape transport system with "P γ" coincidence measurements. The half life of 121 Ce decay was determined to be (1.1±0.1)s. Its energy spectrum of β delayed protons was measured and the β delayed proton branching ratio for 121 Ce decay was roughly estimated to be ～1%. After β delayed proton decay of the precursors \{ 119 Ba,\} \{ 121 Ba\} and 122 La, some of γ transitions from low lying states to the ground states in their "daughters" were observed for the first time.展开更多
文摘Unknown β delayed proton precursor 121 Ce was produced via the reaction of 92 Mo( 32 S, 3n), and identified by an He jet fast tape transport system with "P γ" coincidence measurements. The half life of 121 Ce decay was determined to be (1.1±0.1)s. Its energy spectrum of β delayed protons was measured and the β delayed proton branching ratio for 121 Ce decay was roughly estimated to be ～1%. After β delayed proton decay of the precursors \{ 119 Ba,\} \{ 121 Ba\} and 122 La, some of γ transitions from low lying states to the ground states in their "daughters" were observed for the first time.
