The short-lived activities in ${\mathrm{Cl}}^{34}$, ${\mathrm{K}}^{38}$, ${\mathrm{Ca}}^{39}$, ${\mathrm{Li}}^8$, ${\mathrm{He}}^6$, and ${\mathrm{O}}^{15}$ formed by high-energy bremsstrahlung irradiation have been examined, and some improved values for the half-lives of these nuclides are reported.

• Received 20 August 1954

DOI:https://doi.org/10.1103/PhysRev.96.1620