Evaluation of half-lives and average decay energies for short-lived fission product nuclides

β-decay half-lives T1/2, average β-energies E-barβ, and average γ-energies E-barγ, which are essential for the decay heat, are calculated with use of an improved gross theory of β-decay. First, the improvement of the gross theory is explained, and then T1/2, E-barβ, and E-barγ are tabulated for β--decay nuclides with 26 < Z(proton number) < 65 and N(neutron number) < (147/92)Z + 6 except for those with small Q-value. The β-decay Q-values used in this calculation are obtained from the Wapstra-Audi mass evaluation and a mass formula newly constructed by Tachibana et al. Figures are given to indicate how the results depend on the parameters in the model. (author)