Toward the limit of nuclear binding on the N=Z line: Spectroscopy of Cd 96

P. J. Davies, J. Park, H. Grawe, R. Wadsworth, R. Gernhäuser, R. Krücken, F. Nowacki, D. S. Ahn, F. Ameil, H. Baba, T. Bäck, B. Blank, A. Blazhev, P. Boutachkov, F. Browne, I. Čeliković, M. Dewald, P. Doornenbal, T. Faestermann, Y. FangG. De France, N. Fukuda, A. Gengelbach, J. Gerl, J. Giovinazzo, S. Go, N. Goel, M. Górska, E. Gregor, H. Hotaka, S. Ilieva, N. Inabe, T. Isobe, D. G. Jenkins, J. Jolie, H. S. Jung, A. Jungclaus, D. Kameda, G. D. Kim, Y. K. Kim, I. Kojouharov, T. Kubo, N. Kurz, M. Lewitowicz, G. Lorusso, D. Lubos, L. Maier, E. Merchan, K. Moschner, D. Murai, F. Naqvi, H. Nishibata, D. Nishimura, S. Nishimura, I. Nishizuka, Z. Patel, N. Pietralla, M. M. Rajabali, S. Rice, H. Sakurai, H. Schaffner, Y. Shimizu, L. F. Sinclair, P. A. Söderström, K. Steiger, T. Sumikama, H. Suzuki, H. Takeda, J. Taprogge, P. Thöle, S. Valder, Z. Wang, N. Warr, H. Watanabe, V. Werner, J. Wu, Z. Y. Xu, A. Yagi, K. Yoshinaga, Y. Zhu

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A γ-decaying isomeric state (τ1/2=197-17+19 ns) has been identified in Cd96, which is one α particle away from the last known bound N=Z nucleus, Sn100. Comparison of the results with shell-model calculations has allowed a tentative experimental level scheme to be deduced and the isomer to be interpreted as a medium-spin negative-parity spin trap based on the coupling of isoscalar (T=0) and isovector (T=1) neutron-proton pairs. The data also suggest evidence for the population of a 9+ T=1 state, which is predicted by shell-model calculations to be yrast. Such a low-lying T=1 state, which is unknown in lighter mass even-even self-conjugate nuclei, can also be interpreted in terms of the coupling of T=0 and T=1 neutron-proton pairs.

Original languageEnglish
Article number021302
Number of pages6
JournalPhysical Review C
Issue number2
Publication statusPublished - 11 Feb 2019

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