High precision half-life measurement of $$^{95}\hbox {Ru}$$95Ru , $$^{95}\hbox {Tc}$$95Tc and $$^{95m}\hbox {Tc}$$95mTc with $$\gamma $$γ -spectroscopy

The precise knowledge of the half-life of the reaction product is of crucial importance for a nuclear reaction cross section measurement carried out with the activation technique. The cross section of the $$^{92}\hbox {Mo}$$ ( $$\alpha $$ ,n) $$^{95}\hbox {Ru}$$ reaction was measured recently using this experimental approach. The preliminary results indicated that the literature half-life of $$^{95}\hbox {Ru}$$ , derived about half a century ago, is overestimated. Therefore, the half-lives of $$^{95}\hbox {Ru}$$ and its daughter isotope $$^{95}\hbox {Tc}$$ and $$^{95m}\hbox {Tc}$$ have been measured with high precision using $$\gamma $$ -spectroscopy. The results are $$\hbox {t}_{1/2} =1.6033 \pm 0.0044$$  h for $$^{95}\hbox {Ru}$$ , $$\hbox {t}_{1/2} =19.258 \pm 0.026$$  h for $$^{95}\hbox {Tc}$$ and $$\hbox {t}_{1/2} =61.96 \pm 0.24$$  d for $$^{95m}\hbox {Tc}$$ . The precision of the half-life values has been increased, consequently the recently measured $$^{92}\hbox {Mo}$$ ( $$\alpha $$ ,n) $$^{95}\hbox {Ru}$$ activation cross section will become more precise.