Simultaneous emission of two light charged particles in spontaneous fission of 248Cm and 252Cf

Simultaneous emission of two light charged particles (α-α, α-t, α-p) from spontaneous fission of 248Cm and 252Cf has been investigated. Identification of charged particles in triple and quaternary fission was performed by pulse shape analysis method using two CsI(Tl)counters. The emission probabilities of two light charged particles for these nuclei were determined: (1.4±0.3)·10-7 and (2.9±0.6)·10-7 per binary fission, respectively. The energy spectra of alpha particles, measured in quaternary fission, are shifted with ∼ 2 MeV to low energy part compared with triple alpha particle spectra. (author). 7 refs., 2 figs., 1 tab