Half-Lives ofNa20andK36

Abstract
As two conflicting values have been given for the half-lives of both Na20 and K36, we have carefully measured them with a "pneumatic-shuttle" system. We find T12=446±8 msec for Na20 and T12=343±28 msec for K36. In addition, and as a check against systematic errors, the half-lives of P28, Cl32, Sc40, and Ga64 were measured.