E. V. Brakhman, G. V. Danilyan, A. V. Fedorov, I. L. Karpikhin, V. A. Krakhotin, V. S. Pavlov, R. Golub, E. I. Korobkina, T. Wilpert, “Search for $P$-odd asymmetry of prompt neutrons emission in $^{235}$U fission induced by cold polarized neutrons”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2004, Volume 80, Issue 11,Pages 803

This article is cited in 2 papers

FIELDS, PARTICLES, AND NUCLEI

Search for $P$-odd asymmetry of prompt neutrons emission in $^{235}$U fission induced by cold polarized neutrons

E. V. Brakhman^a, G. V. Danilyan^a, A. V. Fedorov^a, I. L. Karpikhin^a, V. A. Krakhotin^a, V. S. Pavlov^a, R. Golub^b, E. I. Korobkina^b, T. Wilpert^b

^a State Scientific Center of Russian Federation – Institute for Theoretical and Experimental Physics, 117218 Moscow, Russia
^b Berlin Neutron Scattering Center of Hahn-Meitner Institute, D-14 109 Berlin

Abstract: The preliminary result of the $P$-odd asymmetry of prompt neutron emission in $^{235}$U 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 $^{235}$U 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.

PACS: 24.70.+s, 24.80.+y, 25.85.Ec

Received: 21.10.2004

Language: English