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Accueil du site > Publications récentes > Ultrafast-timing lifetime measurements in 94Ru and 96Pd : Breakdown of the seniority scheme in N=50 isotones

Ultrafast-timing lifetime measurements in 94Ru and 96Pd : Breakdown of the seniority scheme in N=50 isotones

I. Matea, D. Verney

Abstract

The advanced time-delayed γγ(t) method has been applied to determine half-lives of low-lying states in the N=50 isotones 94Ru and 96Pd. The inferred experimental E2 strengths for the 4+2+ transitions in the two nuclei show a dramatic deviation with respect to the shell model predictions in the (f5/2,p,g9/2) proton hole space in 100Sn. The anomalous behavior can be ascribed to a breakdown of the seniority quantum number in the πgn9/2 configuration due to particle-hole excitations across the N=Z=50 shell as confirmed by large-scale shell model calculations.


Voir en ligne : Phys. Rev. C 95, 014313 – Published 13 January 2017


 

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