1. H. Leutz, K. Schneckenberger, and H. Wenninger, Nucl. Phys.,63, 263 (1965).
2. F. Boley, Phys. Rev.,94, 1078 (1958).
3. K. Geiger, Phys. Rev.,105, 1539 (1957).
4. N. G. Gusev, V. P. Mashkovich, and B. V. Verbitskii, Radioactive Isotopes as ? Radiators [in Russian], Atomizdat, Moscow (1964).
5. Nuclear Data, Part 2 [in Russian], Atomizdat, Moscow (1970), p. 6.