1. A.V.Argon et al, Phys. Rev. 78, 691 (1950).
2. B. H. Flowers and F. Mandl, Proc.. R. Soc.. London,Ser A206, 131 (1950).
3. W.E. Meyerhof, M. Suffert, and W. Feldman,Nncl. Pliys. A148, 211 (1970).
4. B.M. Berman, D.D.Faul, P. Meyer, and D.L. Olson, Phys. Rev. C22, 2273 (1980).
5. L. Ward et al, Phys. Rev. C24, 317 (1981).