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$$alpha$$-decay branching ratio of $$^{180}$$Pt

$$^{180}$$Ptの$$alpha$$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.*

$$^{180}$$Ptの基底状態から娘核$$^{176}$$Osの基底状態への$$alpha$$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。$$^{180}$$PtはCERN-ISOLDE実験施設において$$^{180}$$Hgを単離し、その$$beta$$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$$alpha$$崩壊の換算崩壊幅は、中性子欠損Pt同位体の$$alpha$$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 $$alpha$$-decay branching ratio of 0.52(5)% from the ground state of $$^{180}$$Pt to the ground state of the daughter nucleus $$^{176}$$Os has been determined more precisely than before. The $$^{180}$$Pt was produced as the $$beta$$-decay granddaughter of $$^{180}$$Hg which was produced and separated with the CERN-ISOLDE facility. The reduced $$alpha$$-decay width calculated with the present result has provided a new picture of the systematics for the $$alpha$$-decay width of neutron-deficient Pt isotopes.

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パーセンタイル:84.86

分野:Physics, Nuclear

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