Comments on Evaluation Tc Tc -comments on Evaluation of Decay Data by X. Mougeot 1 Decay Scheme 2 Nuclear Data Tc Half-life

The evaluation of the 99Tc half-life is described in the next section. Table 2 summarizes the measurements and their methodology. Although the β-decay of 99Tc is practically 100 % from its 9/2+ ground state to the 5/2+ ground state of 99Ru, 1973LE10 and 1974EN02 observed a β-decay with a very small intensity to the 3/2+ first excited state of 99Ru. Thus, its energy, half-life and the multipolarity of the de-exciting γ-ray are evaluated. The βbranching ratio is evaluated next. An analysis of the published form factors of the main βtransition is presented here. With the described limitations, an evaluation was carried out and the mean energy of the spectrum was calculated.