/ Experiment-Nucl

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

Mach, H. (NCBJ, Swierk) ; Korgul, A. (Warsaw U.) ; Górska, M. (Darmstadt, GSI) ; Grawe, H. (Darmstadt, GSI) ; Matea, I. (Orsay, IPN) ; Stănoiu, M. (Bucharest, IFIN-HH) ; Fraile, L.M. (UCM, Somosaguas) ; Penionzkevich, Yu. E. (Dubna, JINR) ; Santos, F. De Oliviera (GANIL) ; Verney, D. (Orsay, IPN) ; Lukyanov, S. (Dubna, JINR) ; Cederwall, B. (KTH, Stockholm) ; Covello, A. (U. Naples (main)) ; Dlouhý, Z. (Rez, Nucl. Phys. Inst.) ; Fogelberg, B. (Uppsala U. (main)) ; De France, G. (GANIL) ; Gargano, A. (INFN, Naples) ; Georgiev, G. (CSNSM, Orsay) ; Grzywacz, R. (Tennessee U.) ; Lisetskiy, A.F. (Arizona U.) ; Mrazek, J. (Rez, Nucl. Phys. Inst.) ; Nowacki, F. (Strasbourg, IReS) ; Płóciennik, W.A. (NCBJ, Swierk) ; Podolyák, Zs. (Surrey U.) ; Ray, S. (GANIL) ; Ruchowska, E. (NCBJ, Swierk) ; Saint-Laurent, M.G. (GANIL) ; Sawicka, M. (Warsaw U.) ; Stodel, Ch. (GANIL) ; Tarasov, O. (Michigan State U., NSCL)

Published in: Phys.Rev.
Year: 2017
Vol.: C95    Num./Issue: 1
Page No: 014313
Pages: 7
Year: 2017-01-13 published

Abstract: The advanced time-delayed γγ(t) method has been applied to determine half-lives of low-lying states in the N=50 isotones Ru94 and Pd96. 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 Sn100. The anomalous behavior can be ascribed to a breakdown of the seniority quantum number in the πg9/2n configuration due to particle-hole excitations across the N=Z=50 shell as confirmed by large-scale shell model calculations.

Total numbers of views: 570
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DOI: 10.1103/PhysRevC.95.014313
 Record created 2017-02-02, last modified 2017-02-02

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