ON THE CRITICAL-TEMPERATURE IN THE A15 COMPOUNDS

Using a generalized form of the Eliashberg gap equations, which includes possible variations of the electronic density of states N( epsilon ) with energy, the critical temperature was calculated for a model density of state which consists of a Lorentzian peak superimposed on a constant background density. By changing the value of the width in the Lorentzian form, the change in T//c with disorder is discussed. When the width is reduced to zero, T//c saturates to some finite value which can be calculated.