Physics
Scientific paper
Mar 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998phrvl..80.2554g&link_type=abstract
Physical Review Letters, Volume 80, Issue 12, March 23, 1998, pp.2554-2557
Physics
46
Scientific paper
Recent measurements of galactic radioactivity with the Compton Gamma Ray Observatory reported 44Ti activity from the supernova remnant Cassiopeia A. The absolute amount of 44Ti provides a stringent test for current supernova models. The main uncertainty is presently the half-life of 44Ti. We report a new measurement of the half-life of 44Ti applying a novel technique using a mixed radioactive ion beam containing 44Ti as well as 22Na ions. This method allows the reliable determination of the half-life of 44Ti with high accuracy, t1/2 = \(60.3+/-1.3\) yr. The 44Ti abundance determined for Cassiopeia A with this half-life agrees with theoretical predictions within the observational uncertainties.
Bazin Daniel
Boyd Richard N.
Buchmann Lothar
Görres Joachim
Harkewicz R.
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