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VOLUME 80 (2004) | ISSUE 11 | PAGE 803
Search for P-odd asymmetry of prompt neutrons emission in 235U fission induced by cold polarized neutrons
PACS: 24.70.+s, 24.80.+y, 25.85.Ec
Abstract
The preliminary result of the P-odd asymmetry of prompt neutron emission in 235U fission induced by polarized cold neutrons is a = (2.7 \pm 0.8)\cdot10^{-5}. Only the scission neutrons can show such asymmetry, whereas neutrons emitted by excited fragments are the unavoidable background, which suppress the sought asymmetry. The P-odd asymmetry of light fragment emission for 235U is equal to (8.4 \pm 0.6)\cdot10^{-4}. Assuming that last figure defines the parity mixture of fissile nucleus then the suppression factor is equal approximately to 3.