β+ decay and cosmic-ray half-life of 54Mn

Details β+ decay and cosmic-ray half-life of 54Mn β+ decay and cosmic-ray half-life of 54Mn

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989phrvc..39.1511s&link_type=abstract

Physical Review C (Nuclear Physics), Volume 39, Issue 4, April 1989, pp.1511-1513

Physics

Nuclear Physics

13

Beta Decay, Double Beta Decay, Electron And Muon Capture, 39<=A<=58

Scientific paper

54Mn has previously been observed in cosmic rays where is it expected to decay by β+ and β- transitions with a half-life of a few million years. The present experiment to measure the β+ decay branch in the laboratory establishes an upper limit of 4.4×10-8 for the branching ratio, and a lower limit of 13.3 for the logft value of this second forbidden unique transition. If it is assumed that the β- decay branch has the same logft value, then its partial half-life must be greater than 4×104 years.

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