Evidence of Partial Seniority Conservation in the $\pi{g}_{9/2}$ Shell for the $N=50$ Isotones

R.M. Pérez-Vidal , A. Gadea , C. Domingo-Pardo , A. Gargano , J.J. Valiente-Dobón , E. Clément (1) , A. Lemasson (1) , L. Coraggio , M. Siciliano , S. Szilner , M. Bast , T. Braunroth , J. Collado , A. Corina , A. Dewald , M. Doncel , J. Dudouet (2) , G. de France (1) , C. Fransen , V. González , T. Hüyük , B. Jacquot (1) , P.R. John , A. Jungclaus , Y.H. Kim (1, 3) , A. Korichi (4) , M. Labiche , S. Lenzi , H. Li (1) , J. Ljungvall (4) , A. López-Martens (4) , D. Mengoni , C. Michelagnoli (1, 3) , C. Müller-Gatermann , D.R. Napoli , A. Navin (1) , B. Quintana , D. Ramos (1) , M. Rejmund (1) , E. Sanchis , J. Simpson , O. Stezowski (2) , D. Wilmsen (1) , M. Zielińska (5) , A.J. Boston , D. Barrientos , P. Bednarczyk , G. Benzoni , B. Birkenbach , H.C. Boston , A. Bracco , B. Cederwall , D.M. Cullen , F. Didierjean (6) , J. Eberth , A. Gottardo , J. Goupil (1) , L.J. Harkness-Brennan , H. Hess , D.S. Judson , A. Kaşkaş , W. Korten (5) , S. Leoni , R. Menegazzo , B. Million , J. Nyberg , Zs. Podolyak , A. Pullia , D. Ralet (1) , F. Recchia , P. Reiter , K. Rezynkina (6) , M.D. Salsac (5) , M. Şenyiğit , D. Sohler , Ch. Theisen (5) , D. Verney (4)

1 GANIL - Grand Accélérateur National d'Ions Lourds
2 IP2I Lyon - Institut de Physique des 2 Infinis de Lyon
3 ILL - Institut Laue-Langevin
4 IJCLab - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
5 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
6 IPHC - Institut Pluridisciplinaire Hubert Curien

The reduced transition probabilities for the $4^+_1 \to 2^+_1$ and $2^+_1 \to 0^+_1$ transitions in $^{92}$Mo and $^{94}$Ru and for the $4^+_1 \to 2^+_1$ and $6^+_1 \to 4^+_1$ transitions in $^{90}$Zr have been determined in this experiment making use of a multinucleon transfer reaction. These results have been interpreted on the basis of realistic shell-model calculations in the $f_{5/2}, p_{3/2}, p_{1/2},$ and $g_{9/2}$ proton valence space. Only the combination of extensive lifetime information and large scale shell-model calculations allowed the extent of the seniority conservation in the $N=50 g_{9/2}$ orbital to be understood. The conclusion is that seniority is largely conserved in the first $\pi{g}_{9/2}$ orbital.

Domaines: Physique Nucléaire Théorique [nucl-th]

R.M. Pérez-Vidal, A. Gadea, C. Domingo-Pardo, A. Gargano, J.J. Valiente-Dobón, et al.. Evidence of Partial Seniority Conservation in the $\pi{g}_{9/2}$ Shell for the $N=50$ Isotones. Physical Review Letters, 2022, 129 (11), pp.112501. ⟨10.1103/PhysRevLett.129.112501⟩. ⟨hal-03773692⟩