Double arm spectrometer SAVEC has been used to identify spontaneous colline
ar tripartition of Cf-252 nuclei: (M0)Z(0)--->(M1)Z(1) + (M3)Z(3) + (M2)Z(2
). No effect has been observed for M-3>75 u at the level of 7.5 x 10(-6) wi
th respect to the probability of the binary fission process. [S0556-2813 (9
9)00807-9].