Observation of Bound-State {ital {beta}}{sup {bold {minus}}} Decay of Fully Ionized {sup 187}Re: {sup 187}Re-{sup 187}Os Cosmochronometry

Journal Article · Sun Dec 01 00:00:00 EST 1996 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.77.5190· OSTI ID:404092

Bosch, F; Faestermann, T; Friese, J; Heine, F; Kienle, P; Wefers, E; Zeitelhack, K; Beckert, K; Franzke, B; Klepper, O; Kozhuharov, C; Menzel, G; Moshammer, R; Nolden, F; Reich, H; Schlitt, B; Steck, M; Stoehlker, T; Winkler, T; Takahashi, K ^[1]

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1. Gesellschaft fuer Schwerionenforschung mbH, Planckstrae 1, D-64291 Darmstadt (Germany)

We observed the bound-state {beta}{sup {minus}} decay of fully ionized {sup 187}Re nuclei circulating in a storage ring. With two independent methods the time dependent growth of hydrogenlike {sup 187}Os ions has been measured and a half-life of 32.9{plus_minus}2.0 yr for bare {sup 187}Re nuclei could be determined, to be compared with 42Gyr for neutral {sup 187}Re atoms. With the resulting log{ital ft} value of 7.87{plus_minus}0.03 the half-life of {sup 187}Re ions in any ionization state can be calculated. Thus one can correct the {sup 187}Re-{sup 187}Os galactic chronometer calibration, by taking account of the {beta}{sup {minus}} decay enhancement in stellar interiors, which will lead to a more accurate estimate of the galactic age. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 404092
• Journal Information: Physical Review Letters, Vol. 77, Issue 26; Other Information: PBD: Dec 1996
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
43 PARTICLE ACCELERATORS
RHENIUM 187
BETA-MINUS DECAY
BOUND STATE
STORAGE RINGS
TIME DEPENDENCE
OSMIUM IONS
OSMIUM 187
HALF-LIFE
IONIZATION