Physics – Nuclear Physics
Scientific paper
Feb 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977phrvc..15..467k&link_type=abstract
Physical Review C (Nuclear Physics), Volume 15, Issue 2, February 1977, pp.467-476
Physics
Nuclear Physics
Scientific paper
Analyzing powers of the 6Li(n-->, 3H)4He 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° were incident on an evaporated 6Li metal target. A silicon surface barrier detector was used to measure α-particle and triton yields as a function of particle energy at angles of 30°, 60°, and 80°. For the supplementary data set the reaction angle was 55°. Tritons and α particles were distinguished by time-of-flight techniques. α-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 52- resonance at 0.247 MeV. Interference between the 52- level and a broad 32- state above 2 MeV also contributes. At higher energies interference between the 32- state and s waves results in analyzing powers close to +0.9 near 90° which vary slowly with neutron energy between 0.7 and 2.4 MeV. NUCLEAR REACTIONS 6Li(n-->, 3H), E=0.2-2.4 MeV, measured Ay(θ),. θ=30-150°.
Karim Munawar
Overley J. C.
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