1. G. Cortini, C. Milone, A. Rubbino andF. Ferrero:Nuovo Cimento (1958) in press.
2. L. Rosen:Nucleonics,11, 7, 32;11, 8, 38 (1953).
3. V. F. Weisskopf andD. H. Ewing:Phys. Rev.,57, 472 (1940).
4. As Prof.G. Cortini pointed out to us, the integral in the denominator of this formula cannot be ignored as was mistakenly done in a preceeding paper (1). Therefore the evaporation curves of fig. 2 and 3 of the quoted paper correspond to density level distributions rather lower than indicated there (3.1). This gives no changement in the conclusions of paper (1).
5. H. Feshbach andV. F. Weisskopf:Phys. Rev.,76, 1550 (1949).