16(+) Spin-Gap Isomer in Cd-96

B.S. Nara Singh, Z. Liu, R. Wadsworth, H. Grawe, T.S. Brock, P. Boutachkov, N. Braun, A. Blazhev, M. Gorska, S. Pietri, D. Rudolph, C. Domingo-Pardo, S.J. Steer, A. Atac, L. Bettermann, L. Caceres, K. Eppinger, T. Engert, T. Faestermann, F. FarinonF. Finke, K. Geibel, J. Gerl, R. Gernhaeuser, N. Goel, A. Gottardo, J. Grebosz, C. Hinke, R. Hoischen, G. Ilie, H. Iwasaki, J. Jolie, A. Kaskas, I. Kojouharov, R. Kruecken, N. Kurz, E. Merchan, C. Nociforo, J. Nyberg, M. Pfuetzner, A. Prochazka, Zs. Podolyak, P.H. Regan, P. Reiter, S. Rinta-Antila, C. Scholl, H. Schaffner, P.-A. Soderstrom, N. Warr, H. Weick, H.-J. Wollersheim, P.J. Woods, F. Nowacki, K. Sieja

Research output: Contribution to journalArticle


A β-decaying high-spin isomer in 96Cd, with a half-life T1/2=0.29+0.11−0.10 s, has been established in a stopped beam rare isotope spectroscopic investigations at GSI (RISING) experiment. The nuclei were produced using the fragmentation of a primary beam of 124Xe on a 9Be target. From the half-life and the observed γ decays in the daughter nucleus,
96Ag, we conclude that the β-decaying state is the long predicted 16+ “spin-gap” isomer. Shell-model calculations, using the Gross-Frenkel interaction and the πν(p1/2,g9/2) model space, show that the isoscalar component of the neutron-proton interaction is essential to explain the origin of the isomer. Core excitations across the N=Z=50 gaps and the Gamow-Teller strength, B(GT) distributions have been studied via large-scale shell-model calculations using the πν(g,d,s) model space to compare with the experimental B(GT) value obtained from the half-life of the isomer.
Original languageEnglish
Article number172502
Number of pages5
JournalPhysical Review Letters
Issue number17
Publication statusPublished - 18 Oct 2011
Externally publishedYes


Cite this

Nara Singh, B. S., Liu, Z., Wadsworth, R., Grawe, H., Brock, T. S., Boutachkov, P., Braun, N., Blazhev, A., Gorska, M., Pietri, S., Rudolph, D., Domingo-Pardo, C., Steer, S. J., Atac, A., Bettermann, L., Caceres, L., Eppinger, K., Engert, T., Faestermann, T., ... Sieja, K. (2011). 16(+) Spin-Gap Isomer in Cd-96. Physical Review Letters, 107(17), [172502]. https://doi.org/10.1103/PhysRevLett.107.172502