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APS » Journals » Phys. Rev. Lett. » Volume 80 » Issue 12
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Phys. Rev. Lett. 80, 2550–2553 (1998)

Three-Laboratory Measurement of the 44Ti Half-Life

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I. Ahmad1, G. Bonino2a,2b, G. Cini Castagnoli2a,2b, S. M. Fischer1, W. Kutschera1,3, and M. Paul1,4
1Physics Division, Argonne National Laboratory, Argonne, Illinois 60439
2aIstituto di Cosmo-Geofisica, Consiglio Nazionale delle Ricerche, Corso Fiume 4, I-10133 Torino, Italy
2band Dipartimento di Fisica Generale dell'Università, Via P. Giuria 1, I-10125 Torino, Italy
3Institut fuer Radiumforschung und Kernphysik der Universitaet Wien, Boltzmanngasse 3, A-1090 Vienna, Austria
4Racah Institute of Physics, Hebrew University, Jerusalem, Israel 91904

Received 21 October 1997; published in the issue dated 23 March 1998

See accompanying Physics Focus

We report on a measurement of the 44Ti half-life aimed at lowering existing systematic uncertainties in this value, which is important to astrophysics. The half-life was measured by following the decay of 44Ti relative to 60Co for about 5 yr and the measurements were performed independently in three laboratories—Argonne, Jerusalem, and Torino. We suggest to combine our result, 59.0±0.6 yr, with the one from the accompanying Letter by Görres et al., 60.3±1.3 yr, to obtain a current “best value” for the half-life of 44Ti of 59.2±0.6 yr ( 1σ error).

© 1998 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.80.2550
DOI:
10.1103/PhysRevLett.80.2550
PACS:
21.10.Tg, 26.30.+k, 26.40.+r, 27.40.+z
 
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