Beta decay of tritium

Details Beta decay of tritium Beta decay of tritium

Aug 1970

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1970nupha.151..120l&link_type=abstract

Nuclear Physics A, Volume 151, Issue 1, p. 120-128.

Physics

Nuclear Physics

4

Radioactivity

Scientific paper

The β-spectrum of tritium was investigated down to energies of about 11/2 keV using a lithium drifted silicon detector with tritons implanted in the depletion layer. The end-point energy was determined as 18.540 +/- 0.095 keV, assuming a zero anti-neutrino rest mass. The random and systematic uncertainties are +/- 0.065 keV and +/- 0.070 keV respectively, and all uncertainties are quoted for 95 % confidence levels. Taking the triton half-life as 12.35 +/- 0.05 y, an ft value of 1144 +/- 9 sec is deduced. With a neutron ft value of 1109 +/- 17 sec this result indicates a positive pion exchange enhancement of the triton GT matrix element.

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