Observation of Bound-State β- Decay of Fully Ionized 187Re: 187Re-187Os Cosmochronometry

Details Observation of Bound-State β- Decay of Fully Ionized 187Re: 187Re-187Os Cosmochronometry Observation of Bound-State β- Decay of Fully Ionized 187Re: 187Re-187Os Cosmochronometry

Dec 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996phrvl..77.5190b&link_type=abstract

Physical Review Letters, Volume 77, Issue 26, December 23, 1996, pp.5190-5193

Physics

72

Scientific paper

We observed the bound-state β- 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+/-2.0 yr 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+/-0.03 the half-life of 187Re ions in any ionization state can be calculated. Thus one can correct the 187Re-187Os galactic chronometer calibration, by taking account of the β- decay enhancement in stellar interiors, which will lead to a more accurate estimate of the galactic age.

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