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Journal Articles

Experimental identification of spin-parities and single-particle configurations in $^{257}$ No and its -decay daughter $^{253}$ Fm

Asai, Masato; Tsukada, Kazuaki; Sakama, Minoru*; Ichikawa, Shinichi; Ishii, Tetsuro; Nagame, Yuichiro; Nishinaka, Ichiro; Akiyama, Kazuhiko; Osa, Akihiko; Oura, Yasuji*; et al.

Physical Review Letters, 95(10), p.102502_1 - 102502_4, 2005/09

https://doi.org/10.1103/PhysRevLett.95.102502

Times Cited Count：64 Percentile：87.37(Physics, Multidisciplinary)

Excited states in $^{253}$ Fm fed by the decay of $^{257}$ No have been established through - and -electron coincidence spectroscopy using a gas-jet transport system and an on-line isotope separator. The spin-parity of the 124.1 keV level in $^{253}$ Fm has been identified on the basis of the measured internal conversion coefficients. The $nu 3/2^{+}[622]$ configuration has been assigned to the ground state of $^{257}$ No as well as to the 124.1 keV level. It was found that the ground state configuration of $^{257}$ No is different from that of lighter isotones.