Radiative capture of tensor polarized deuterons by the hydrogen isotopes
The angular distributions of the cross section sigma(theta), vector analyzing power A/sub y/, and tensor analyzing power A/sub yy/ were measured for the /sup 1/H(anti d, ..gamma..)/sup 3/He and /sup 2/H(anti d, ..gamma..)/sup 4/He reactions at E/sub d/ = 95 MeV. Our measurement of the /sup 2/H(anti d, ..gamma..)/sup 4/ reaction revealed that at E/sub d/ = 95 MeV there were no significant changes from the reaction observed at E/sub d/ = 10 MeV. The 90/sup 0/ cross section is about 10% of the maximum cross section. All of our results are consistent with the presence of E1 radiation in addition to the dominant E2 transition. A mechanism exists to give E1 strength in this reaction, since the isospin selection rule suppressing the E1 transition is rigorous only in the long wavelength limit. Our measurement of the /sup 1/H(anti d, ..gamma..)/sup 3/He cross section was in good agreement with other measurements of this process. The tensor analyzing power was small and negative (approx. -0.07). A simple PWBA model successfully fit this tensor analyzing power with the same parameter set used to interpret A/sub yy/ at E/sub d/ = 30 MeV. Within the framework of this model, the asymptotic D-S state normalization ratio is eta = -0.029. This feature was unexpected, since the reaction mechanism changes dramatically with energy (initial state interactions have died out at E/sub d/ = 95 MeV).
- Research Organization:
- Indiana Univ., Bloomington (USA)
- OSTI ID:
- 5740893
- Country of Publication:
- United States
- Language:
- English
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Tensor polarized deuteron capture by [sup 3]He at and above the fusion resonance region
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Related Subjects
A=1-5
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANALYZING POWER
BEAMS
CAPTURE
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
DEUTERIUM TARGET
DEUTERON REACTIONS
E1-TRANSITIONS
ELECTROMAGNETIC RADIATION
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
GAMMA RADIATION
HELIUM 3
HELIUM 4
HELIUM ISOTOPES
HYDROGEN 1 TARGET
INFORMATION
IONIZING RADIATIONS
ISOTOPES
LIGHT NUCLEI
MEV RANGE
MEV RANGE 10-100
MULTIPOLE TRANSITIONS
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
POLARIZED BEAMS
RADIATIONS
STABLE ISOTOPES
TARGETS