Half-lives and branching ratios of some T=1/2 nuclei

Precision half-life measurements and branching ratio determinations have been carried out for some T=1/2 mirror nuclei. The following results have been obtained for the half-life and for the branching ratios: ¹³N (597.9 ± 0.6 s), ¹⁵O (122.23 ± 0.23 s), ¹⁷F (64.31 ± 0.09 s), ²¹Na [(95.8 ± 0.2)%], ²³Mg [11.317 ± 0.011 s, (92.2 ± 0.2)%], ²⁵Al [(99.16 ± 0.04)%], ²⁷Si [(99.812 ± 0.010)%], ²⁹P [(98.11 ± 0.30)%], ³¹S [2.543 ± 0.008 s, (98.89 ± 0.20)%], ³³Cl (2.507 ± 0.008 s), ³⁵Ar [1.774 ± 0.003 s, (98.0 ± 0.2)%], ³⁷K [1.223 ± 0.008 s, (97.8 ± 0.2)%], ³⁹Ca (0.8594 ± 0.0016 s, >99.72%).

RADIOACTIVITY ¹³N, ¹⁵O, ¹⁷F, ²¹Na, ²³Mg, ²⁵Al, ²⁷Si, ³¹S, ³³Cl, ³⁵Ar, ³⁷K, ³⁹Ca; measured T=1/2, branching ratios.