Spectroscopy of Rf

Rfの核分光

Qian, J.*; Heinz, A.*; Khoo, T. L.*; Janssens, R. V. F.*; Peterson, D.*; Seweryniak, D.*; Ahmad, I.*; 浅井 雅人  ; Back, B. B.*; Carpenter, M. P.*; Garnsworthy, A. B.*; Greene, J. P.*; Hecht, A. A.*; Jiang, C. L.*; Kondev, F. G.*; Lauritsen, T.*; Lister, C. J.*; Robinson, A.*; Savard, G.*; Scott, R.*; Vondrasek, R.*; Wang, X.*; Winkler, R.*; Zhu, S.*

Qian, J.*; Heinz, A.*; Khoo, T. L.*; Janssens, R. V. F.*; Peterson, D.*; Seweryniak, D.*; Ahmad, I.*; Asai, Masato; Back, B. B.*; Carpenter, M. P.*; Garnsworthy, A. B.*; Greene, J. P.*; Hecht, A. A.*; Jiang, C. L.*; Kondev, F. G.*; Lauritsen, T.*; Lister, C. J.*; Robinson, A.*; Savard, G.*; Scott, R.*; Vondrasek, R.*; Wang, X.*; Winkler, R.*; Zhu, S.*

アルゴンヌ国立研究所の反跳核分離装置を用いて、Rfの線,線,内部転換電子測定実験を行った。Rfの励起状態に、高いK量子数を持った3準粒子状態と解釈される半減期160秒の新核異性体を発見した。また、崩壊の抑止係数より、Rfの娘核であるNoの1準粒子状態の中性子軌道配位を同定した。中性子数151核の1/2[620]準位の励起エネルギーの系統性より、中性子数152の変形閉殻の大きさが、原子番号が増えるにつれて大きくなることを明らかにした。

-, -, and conversion electron spectroscopy experiments for Rf have been performed using Fragment Mass Analyzer at Argonne National Laboratory. A new isomer with a half-life of 160 s has been discovered in Rf, and it is interpreted as a three-quasiparticle high- isomer. Neutron configurations of one-quasiparticle states in No, the -decay daughter of Rf, have been assigned on the basis of -decay hindrance factors. Excitation energies of the 1/2[620] states in =151 isotones indicate that the deformed shell gap at =152 increases with the atomic number.