1. N. Birger andYu. Smorodin:Žurn. Ėksp. Teor. Fiz.,37, 1355 (1959).
2. N. Birger andYu. Smorodin:Nucl. Phys.,30, 350 (1962).
3. After completion of this work we came to learn thatT. Coghen (private communication) had also recognized the linearity of a kinetic energyvs. longitudinal momentum plot for monokinetic particles.
4. E. M. Friedländer:Nuovo Cimento,23, 261 (1961).
5. N. G. Birger, Wang Kan Chang, Wang Tsu Tsen, Din Da Tsao, Yu. V. Katyshev, E. N. Kladnitskaya, D. K. Kopylova, V. B. Lyubimov, Ngnuen Dyn Ty, A. V. Nikitin, M. I. Podgoretsky, M. I. Soloviev adZ. Trka:Žurn. Ėksp. Teor. Fiz.,41, 1461 (1961).