Measurement of the parity-violating triton emission asymmetry in the reaction {sup 6}Li(n,{alpha}){sup 3}H with polarized cold neutrons

We describe measurements of the parity-violating (P-odd) triton emission asymmetry coefficient a{sub P-odd} in the {sup 6}Li(n,{alpha}){sup 3}H reaction with polarized cold neutrons. Experiments were carried out at the Petersburg Nuclear Physics Institute (Gatchina, Russia) and at the Institut Laue-...

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Published in:Physical review. C, Nuclear physics Nuclear physics, 2008-03, Vol.77 (3)
Main Authors: Vesna, V. A., Shulgina, E. V., Gledenov, Yu. M., Sedyshev, P. V., Nesvizhevsky, V. V., Petoukhov, A. K., Soldner, T., Zimmer, O., Physik-Department E18, TU Muenchen, D-85748 Garching
Format: Article
Language:English
Subjects:
ASYMMETRY
ASYMMETRY COEFFICIENTS
COLD NEUTRONS
CONFIGURATION
EMISSION
HYDROGEN
IONIZATION CHAMBERS
LITHIUM 6
NUCLEAR PHYSICS
NUCLEAR PHYSICS AND RADIATION PHYSICS
NUCLEAR REACTIONS
PARITY
POLARIZED BEAMS
TRITIUM
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Summary:We describe measurements of the parity-violating (P-odd) triton emission asymmetry coefficient a{sub P-odd} in the {sup 6}Li(n,{alpha}){sup 3}H reaction with polarized cold neutrons. Experiments were carried out at the Petersburg Nuclear Physics Institute (Gatchina, Russia) and at the Institut Laue-Langevin (Grenoble, France). We employed an ionisation chamber in a configuration allowing us to suppress the left-right asymmetry well below 10{sup -8}. An additional test for a false asymmetry due to eventual target impurities (''zero test'') resulted in a{sub 0-test}=(0.0{+-}0.5)x10{sup -8}. As final result of this series of experiments we obtained a{sub P-odd}=(-8.8{+-}2.1)x10{sup -8}.
ISSN:0556-2813
1089-490X
DOI:10.1103/PHYSREVC.77.035501