Phys. Rev. Lett. 77, 5190–5193 (1996)Observation of Bound-State β- Decay of Fully Ionized 187Re: 187Re-187Os CosmochronometryReceived 20 September 1996; published in the issue dated 23 December 1996 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±2.0yr 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±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. © 1996 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.77.5190
DOI:
10.1103/PhysRevLett.77.5190
PACS:
23.40.Hc, 27.70.+q, 29.20.Dh, 98.35.Ac
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.