Kinematic measurement of alpha particles accompanied by spontaneous fission of Cf-252

The energies and relative angles of three particles and the specific energy loss of light particles were recorded for each of more than 100,000 measured events. The comparison of measured distributions with former results gave good agreement, with regard to the integral mean values of energy, angle and mass distribution. The comparison of binary fragments with ternary fragment mass spectra showed that the ternary process is not a binary fission with ensuing alpha emission. The fragments are less stimulated in the ternary process, than in the binary process. Deformation energy is asymmetrically distributed at the fission point.