Abstract:
The 2H(n,)3H reaction has been studied with polarized and unpolarized neutrons of energies ranging from 9 to 14 MeV. Angular distributions of cross section were measured at En(lab)=9.0, 10.8, and 14.0 MeV, (90°) was measured at 6.85 MeV, and an analyzing-power angular distribution was measured at 9.0 MeV. The results for (theta) agree with the existing H3(,n)2H data after detailed balancing. The resulting He3(,p)/3H(,n) ratio for 90°cross sections is 1.1 0.15 down to Ex=10.8 MeV. The T-matrix analysis of the data indicates 3% for the E2 contribution to the capture cross section comparable to that found earlier for H2(p,)3He and in contrast to the predictions [n(E2)/p(E2)=1/25] of a two-body direct-capture calculation. © 1986 The American Physical Society.
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