-decay branching ratio of Pt

Ptの崩壊分岐比

Cubiss, J. G.*; Harding, R. D.*; Andreyev, A. N.; Althubiti, N.*; Andel, B.*; Antalic, S.*; Barzakh, A. E.*; Cocolios, T. E.*; Day Goodacre, T.*; Farooq-Smith, G. J.*; Fedorov, D. V.*; Fedosseev, V. N.*; Gaffney, L. P.*; Ghys, L.*; Huyse, M.*; Lynch, K. M.*; Marsh, B. A.*; Martinez Palenzuela, Y.*; Molkanov, P. L.*; Rossel, R. E.*; Rothe, S.*; Seliverstov, M. D.*; Sels, S.*; Spagnoletti, P.*; Van Beveren, C.*; Van Duppen, P.*; Veinhard, M.*; Verstraelen, E.*; Zadvornaya, A.*

Cubiss, J. G.*; Harding, R. D.*; Andreyev, A. N.; Althubiti, N.*; Andel, B.*; Antalic, S.*; Barzakh, A. E.*; Cocolios, T. E.*; Day Goodacre, T.*; Farooq-Smith, G. J.*; Fedorov, D. V.*; Fedosseev, V. N.*; Gaffney, L. P.*; Ghys, L.*; Huyse, M.*; Lynch, K. M.*; Marsh, B. A.*; Martinez Palenzuela, Y.*; Molkanov, P. L.*; Rossel, R. E.*; Rothe, S.*; Seliverstov, M. D.*; Sels, S.*; Spagnoletti, P.*; Van Beveren, C.*; Van Duppen, P.*; Veinhard, M.*; Verstraelen, E.*; Zadvornaya, A.*

Ptの基底状態から娘核Osの基底状態への崩壊分岐比を0.52(5)%と、過去の値と比較してより高精度で再決定した。PtはCERN-ISOLDE実験施設においてHgを単離し、その崩壊孫核種として生成した。今回の結果を用いて導出した崩壊の換算崩壊幅は、中性子欠損Pt同位体の崩壊幅の系統性について新しい描像を与えることとなった。

The -decay branching ratio of 0.52(5)% from the ground state of Pt to the ground state of the daughter nucleus Os has been determined more precisely than before. The Pt was produced as the -decay granddaughter of Hg which was produced and separated with the CERN-ISOLDE facility. The reduced -decay width calculated with the present result has provided a new picture of the systematics for the -decay width of neutron-deficient Pt isotopes.