\begin{center} Half-life measurements of isotopes relevant to the astrophysical $p$-process carried out via photoactivation at the Madison Accelerator Laboratory (MAL) \end{center}

One of the projects underway at MAL is related to measurement of photodisintegration reaction rates for the nucleosynthesis of the $p$-nuclei. Due to the low isotopic abundances of the $p$-nuclei, the half-lives of isotopes with fewer neutrons than the $p$-nuclei tend to be measured with large uncertainties. Our goal was to improve the uncertainty on existing data for the half-lives of $^{\mathrm{73}}$Se, $^{\mathrm{69}}$Ge, $^{\mathrm{83}}$Sr, and $^{\mathrm{63}}$Zn. These isotopes were produced at MAL via photoactivation, $\gamma $-spectroscopy was used to measure the activity of the samples over time and determine the half-life of each isotope using three data analysis methods. To confirm that they gave accurate results, we first tested these methods on a well-known isotope; an isomer of indium ($^{\mathrm{116m1}}$In) with a half-life of 54.29(17) min. A weighted mean of 8 separate measurements yielded a measured half-life for $^{\mathrm{116m1}}$In of 54.35(02) min, which agrees with the accepted value and is more precise. The final results and uncertainties obtained for the half-lives of $^{\mathrm{73}}$Se, $^{\mathrm{69}}$Ge, $^{\mathrm{83}}$Sr, and $^{\mathrm{63}}$Zn will be presented by comparing the three data analysis methods that were applied.