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Analyzing power of the /sup 6/Li(n,/sup 3/H)/sup 4/He reaction from 0. 2 to 2. 4 MeV

Journal Article · · Phys. Rev., C; (United States)
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Analyzing powers of the /sup 6/Li(n,/sup 3/H)/sup 4/He reaction have been measured at six angles for neutron energies from 0.2 to 1.5 MeV. A supplementary data set at two angles extends the energy range to 2.4 MeV. An energy continuum of neutrons was produced by bombarding a thick lithium metal target with a nanosecond-pulsed proton beam. Partially polarized neutrons emitted at 50/sup 0/ were incident on an evaporated /sup 6/Li metal target. A silicon surface barrier detector was used to measure ..cap alpha..-particle and triton yields as a function of particle energy at angles of 30/sup 0/, 60/sup 0/, and 80/sup 0/. For the supplementary data set the reaction angle was 55/sup 0/. Tritons and ..cap alpha.. particles were distinguished by time-of-flight techniques. ..cap alpha..-particle yield asymmetries were converted to backward angle triton asymmetries. Analyzing powers were deduced from asymmetries. The data suggest interference between s waves and the p-wave 5/2/sup -/ resonance at 0.247 MeV. Interference between the 5/2/sup -/ level and a broad 3/2/sup -/ state above 2 MeV also contributes. At higher energies interference between the 3/2/sup -/ state and s waves results in analyzing powers close to +0.9 near 90/sup 0/ which vary slowly with neutron energy between 0.7 and 2.4 MeV.
Research Organization:
Physics Department, University of Oregon, Eugene, Oregon 97403
OSTI ID:
7124198
Journal Information:
Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 15:2; ISSN PRVCA
Country of Publication:
United States
Language:
English

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Related Subjects

651323 -- Nuclear Properties & Reactions
A=6-19
Experimental-- Energy Levels & Transitions-- (-1987)
651325* -- Nuclear Properties & Reactions
A=6-19
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA SPECTRA
ANALYZING POWER
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
ASYMMETRY
BARYON REACTIONS
BEAMS
CHARGED PARTICLES
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
DIRECT REACTIONS
DISTRIBUTION
ENERGY DEPENDENCE
ENERGY LEVELS
ENERGY RANGE
EVEN-EVEN NUCLEI
HADRON REACTIONS
HELIUM 4
HELIUM ISOTOPES
INTERFERENCE
ISOTOPES
KEV RANGE
KEV RANGE 100-1000
LIGHT NUCLEI
LITHIUM 6 TARGET
MEV RANGE
MEV RANGE 01-10
NEUTRON REACTIONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
P WAVES
PARITY
PARTIAL WAVES
PARTICLE PROPERTIES
PICKUP REACTIONS
POLARIZED BEAMS
S WAVES
SPECTRA
STABLE ISOTOPES
TARGETS
TRANSFER REACTIONS
TRITONS