1996/12/23 by F. Bosch, T. Faestermann, J. Friese +17 · 4 citations
Physics and Astronomy · #Particle physics theoretical and experimental studies #Neutrino Physics Research #Dark Matter and Cosmic Phenomena
paper · doi:10.1103/physrevlett.77.5190
openalex publication_date 1996/12/23 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/14
We observed the bound-state \ensuremathβ^\ensuremath- decay of fully ionized 187Re nuclei circulating in a storage ring. With two independent methods the time dependent growth of hydrogenlike 187Os ions has been measured and a half-life of 32.9\ifmmode±\else\textpm\fi2.0yr for bare 187Re nuclei could be determined, to be compared with 42 Gyr for neutral 187Re atoms. With the resulting logft value of 7.87\ifmmode±\else\textpm\fi0.03 the half-life of 187Re ions in any ionization state can be calculated. Thus one can correct the 187Re\ensuremath-187Os galactic chronometer calibration, by taking account of the \ensuremathβ^\ensuremath- decay enhancement in stellar interiors, which will lead to a more accurate estimate of the galactic age.