Summary
Beta-gamma angular-correlation experiments were performed on the 852 keV beta-261 keV gamma cascade in the ground-state decay of115Cd by using a conventional fast-slow coincidence set-up. The present integral-correlation experiment confirmed a 3/2− spin-parity assignment for the 597 keV level in the daughter nucleus115In, while the differential-correlation measurements, have revealed a small energy dependence of the correlation function ε(W). It is concluded that the nonunique first-forbidden 852 keV beta transition does not obey the ξ-approximation.
Riassunto
Esperimenti di correlazione angolare beta-gamma sono stati effettuati sulla caduta 852 keV beta-261 keV gamma nel decadimento dello stato fondamentale del115Cd per mezzo di un set-up convenzionale di coincidenza lento-veloce. Il presente esperimento di correlazione integrale ha confermato un assegnamento di spin-parità uguale a 3/2− per il livello 597 keV nel nucleo figlio115In, mentre le misure di correlazione differenziale hanno rivelato una piccola dipendenza dall'energia della funzione di correlazione ε(W). Si conclude che la transizione beta a 852 keV non unica e proibita per prima non segue l'approssimazione ξ.
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Lakshminarayana, S., Srinivasa Rao, M., Seshagiri Rao, V. et al. 852 keV first-forbidden beta transition in115Cdg . Nuov Cim A 52, 92–98 (1979). https://doi.org/10.1007/BF02774942
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DOI: https://doi.org/10.1007/BF02774942