Angular distribution of tensor polarizations in 2H(α, 5overlineHe g.s)p from the sequential decay reaction 2H(α,p) 5He g.s(α)n
Abstract
The sequential decay reaction 2H(α,p) 5He g.s(α)n has been studied at Eα = 22.5 MeV in kinematically complete p-α coincidence experiments with special regard to the tensor moments of even rank of the intermediate state 5He{3}/{2-}. From the measured absolute differential cross section of this reaction, the angular distributions of the second step for the 5He g.s c.m. production angles from 45.6 to 119.8 were extracted. By applying Welton's formalism to the second step the tensor moments of even rank of the intermediate 5He system were deduced and compared to calculations in the cluster-model formalism. They as well as the absolute differential cross sections for 2H(α,pα)n were found to be in good agreement with the sequential decay model. Small deviations seem to arise from Coulomb interaction between p and α in the final channel and from the restriction to partial waves l ≦ 2.
- Publication:
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Nuclear Physics A
- Pub Date:
- August 1977
- DOI:
- 10.1016/0375-9474(77)90013-6
- Bibcode:
- 1977NuPhA.286..142P