β+ decay and cosmic-ray half-lives of 143Pm and 144Pm

Details β+ decay and cosmic-ray half-lives of 143Pm and 144Pm β+ decay and cosmic-ray half-lives of 143Pm and 144Pm

Aug 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994phrvc..50..728h&link_type=abstract

Physical Review C (Nuclear Physics), Volume 50, Issue 2, August 1994, pp.728-732

Physics

Nuclear Physics

4

Beta Decay, Double Beta Decay, Electron And Muon Capture, 90<=A<=149

Scientific paper

The positron decay partial half-lives of 143Pm and 144Pm are needed to assess the viability of elemental Pm as a cosmic-ray clock. We have conducted experiments to measure the β+ branches of these isotopes; we find β+ branches of <5.7×10-6% for 143Pm and <8×10-5% for 144Pm. Although these branches are a factor of 20 lower than the previous experimental limits, the resulting partial half-lives are still too uncertain to permit any firm conclusions.

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