PARK, J.; KRÜCKEN, R.; LUBOS, D.; GERNHÄUSER, R.; LEWITOWICZ, M.; NISHIMURA, S.; AHN, D.S.; BABA, H.; BLANK, B.; BLAZHEV, A.; BOUTACHKOV, P.; BROWNE, F.; CELIKOVIC, I.; DE FRANCE, G.; DOORNENBAL, P.; FAESTERMANN, T.; FANG, Y.; FUKUDA, N.; GIOVINAZZO, J.; GOEL, N.; GÓRSKA, M.; GRAWE, H.; ILIEVA, S.; INABE, N.; ISOBE, T.; JUNGCLAUS, A.; KAMEDA, D.; KIM, G.D.; KIM, Y.-K.; KOJOUHAROV, I.; KUBO, T.; KURZ, N.; LORUSSO, G.; MOSCHNER, K.; MURAI, D.; NISHIZUKA, I.; PATEL, Z.; RAJABALI, M.M.; RICE, S.; SAKURAI, H.; SCHAFFNER, H.; SHIMIZU, Y.; SINCLAIR, L.; SÖDERSTRÖM, P.-A.; STEIGER, K.; SUMIKAMA, T.; SUZUKI, H.; TAKEDA, H.; WANG, Z.; WATANABE, H.; WU, J.; XU, Z.Y.

doi:10.1103/PhysRevC.96.044311

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Phys.Rev.C. 2017, vol. 96, n° 4, p. 044311

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Half-lives and energies of γ rays emitted in the decay of isomeric states of nuclei in the vicinity of the doubly magic Sn100 were measured in a decay spectroscopy experiment at Rikagaku Kenkyusho (The Institute of Physical and Chemical Research) of Japan Nishina Center. The measured half-lives, some with improved precision, are consistent with literature values. Three new results include a 55-keV E2γ ray from a new (4+) isomer with T1/2=0.23(6)μs in Rh92, a 44-keV E2γ ray from the (15+) isomer in Ag96, and T1/2(6+)=13(2) ns in Cd98. Shell-model calculations of electromagnetic transition strengths in the (p1/2,g9/2) model space agree with the experimental results. In addition, experimental isomeric ratios were compared to the theoretical predictions derived with an abrasion-ablation model and the sharp cutoff model. The results agreed within a factor of 2 for most isomers. From the nonobservation of time-delayed γ rays in Sn100, new constraints on the T1/2, γ-ray energy, and internal conversion coefficients are proposed for the hypothetical isomer in Sn100.< Réduire

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Properties of $\gamma$-decaying isomers and isomeric ratios in the $^{100}$Sn region

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