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Evidence for M1 strength in the /sup 3/H(p-arrow-right,. gamma. )/sup 4/He reaction

Journal Article · · Phys. Rev. C; (United States)
Angular distributions of cross sections and analyzing powers were measured for the /sup 3/H(p-arrow-right,..gamma..)/sup 4/He reaction at incident proton energies of 2.0, 5.0, and 9.0 MeV. The 90/sup 0/ analyzing power was measured at 11 energies between 0.8 and 9.0 MeV. A transition matrix element analysis indicated that the inclusion of M1 strength gave better fits and eliminated the anomalously large /sup 3/D/sub 2/ (E2) strength reported in earlier work. An E1-plus-E2 direct capture calculation was performed. It is shown that this calculation can be brought into agreement with the data if an M1 strength comparable to that found in the T-matrix element analysis (0.5--1.0% of the total capture cross section) is added.
Research Organization:
Duke University and Triangle Universities Nuclear Laboratory, Duke Station, Durham, North Carolina 27706
OSTI ID:
6435564
Journal Information:
Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 39:2; ISSN PRVCA
Country of Publication:
United States
Language:
English