Observation of Bound-State beta - Decay of Fully Ionized 187Re: 187Re-187Os Cosmochronometry.
Observation of Bound-State beta - Decay of Fully Ionized 187Re: 187Re-187Os Cosmochronometry.
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束缚态 beta 的观察 - 完全电离 187Re 的衰变： 187Re-187Os 宇宙测时法。
DOI：
10.1103/physrevlett.77.5190
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发表时间：
1996
影响因子：
8.6
通讯作者：
K. Takahashi
中科院分区：
文献类型：
--
作者：
F. Bosch;T. Faestermann;J. Friese;F. Heine;P. Kienle;E. Wefers;K. Zeitelhack;K. Beckert;B. Franzke;O. Klepper;C. Kozhuharov;G. Menzel;R. Moshammer;F. Nolden;H. Reich;B. Schlitt;M. Steck;T. Stöhlker;T. Winkler;K. Takahashi
We observed the bound-state ${\ensuremath{\beta}}^{\ensuremath{-}}$ decay of fully ionized ${}^{187}$Re nuclei circulating in a storage ring. With two independent methods the time dependent growth of hydrogenlike ${}^{187}$Os ions has been measured and a half-life of $32.9\ifmmode\pm\else\textpm\fi{}2.0\mathrm{yr}$ for bare ${}^{187}$Re nuclei could be determined, to be compared with 42 Gyr for neutral ${}^{187}$Re atoms. With the resulting $\mathrm{log}\mathrm{ft}$ value of $7.87\ifmmode\pm\else\textpm\fi{}0.03$ the half-life of ${}^{187}$Re ions in any ionization state can be calculated. Thus one can correct the ${}^{187}$Re${\ensuremath{-}}^{187}$Os galactic chronometer calibration, by taking account of the ${\ensuremath{\beta}}^{\ensuremath{-}}$ decay enhancement in stellar interiors, which will lead to a more accurate estimate of the galactic age.
We observed the bound-state ${\ensuremath{\beta}}^{\ensuremath{-}}$ decay of fully ionized ${}^{187}$Re nuclei circulating in a storage ring. With two independent methods the time dependent growth of hydrogenlike ${}^{187}$Os ions has been measured and a half-life of $32.9\ifmmode\pm\else\textpm\fi{}2.0\mathrm{yr}$ for bare ${}^{187}$Re nuclei could be determined, to be compared with 42 Gyr for neutral ${}^{187}$Re atoms. With the resulting $\mathrm{log}\mathrm{ft}$ value of $7.87\ifmmode\pm\else\textpm\fi{}0.03$ the half-life of ${}^{187}$Re ions in any ionization state can be calculated. Thus one can correct the ${}^{187}$Re${\ensuremath{-}}^{187}$Os galactic chronometer calibration, by taking account of the ${\ensuremath{\beta}}^{\ensuremath{-}}$ decay enhancement in stellar interiors, which will lead to a more accurate estimate of the galactic age.