Half-lives of nine radioisotopes

We have determined the half-lives of nuclides $^{28}\mathrm{Mg}$, $^{52}\mathrm{Fe}$, $^{55}\mathrm{Co}$, $^{57}\mathrm{Ni}$, $^{67}\mathrm{Cu}$, $^{69}\mathrm{Zn}^{m}$, $^{112}\mathrm{Pd}$, $^{105}\mathrm{Ag}$, and $^{111}\mathrm{Ag}$. The decay was followed for more than 10 half-lives in most cases. The long duration of the measurements, the stability of the counting equipment, and computer programs that allowed least-squares fitting to the sum of several exponentials yielded highly accurate values of the half-lives.[RADIOACTIVITY $^{28}\mathrm{Mg}$, $^{52}\mathrm{Fe}$, $^{55}\mathrm{Co}$, $^{57}\mathrm{Ni}$, $^{67}\mathrm{Cu}$, $^{69}\mathrm{Zn}^{m}$, $^{112}\mathrm{Pd}$, $^{105}\mathrm{Ag}$, $^{111}\mathrm{Ag}$; measured ${T}_{\frac{1}{2}}$.]