Polarized deuteron capture by [sup 3]He and [sup 3]H at and above the fusion resonance region

Journal Article · Mon Jan 31 23:00:00 EST 1994 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.49.912· OSTI ID:5194249

Balbes, M J; Riley, J C; Feldman, G; Weller, H R ^[1]; Tilley, D R ^[2]

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1. Duke University, Durham, North Carolina 27706 (United States) Triangle Universities Nuclear Laboratory, Durham, North Carolina 27706 (United States)
2. North Carolina State University, Raleigh, North Carolina 27695 (United States) Triangle Universities Nuclear Laboratory, Durham, North Carolina 27706 (United States)

The absolute differential cross sections and vector and tensor analyzing powers for the [sup 3]He([ital [rvec d]],[gamma])[sup 5]Li and [sup 3]H([ital [rvec d]],[gamma])[sup 5]He reactions have been measured both in the [ital j][sup [pi]]=3/2[sup +] fusion resonance region [[ital E][sub [ital d]](lab)=0.45 MeV and [ital E][sub [ital d]](lab) = 0.1 MeV, respectively] and at [ital E][sub [ital d]](lab)=8.6 MeV for several angles. In the fusion resonance region, a transition matrix element (TME) analysis of the observables leads to multiple solutions for both reactions, all of which indicate that the reactions proceed predominantly through [ital s]-wave ([ital E]1) capture, with small admixtures of [ital M]1 or [ital E]2 radiation. One solution for each reaction is dominated by a large ([similar to]90%) [sup 4][ital s][sub 3/2]([ital E]1) capture strength. Coupled-channels resonating group model (CCRGM) calculations have been performed which favor these solutions. In the CCRGM picture, the [ital j][sup [pi]]=3/2[sup +] fusion resonance in the capture cross section is a consequence of the tensor force, which couples the [ital s]=3/2, [ital d]+[sup 3]He (or [ital d]+[sup 3]H) channel to the [ital s]=1/2, [ital p]+[sup 4]He (or [ital n]+[sup 4]He) channel, enabling the reactions to proceed via the spin-independent ([ital E]1) transition to the ground state. At [ital E][sub [ital d]](lab)=8.6 MeV, a TME analysis of the [sup 3]He([ital [rvec d]],[gamma])[sup 5]Li reaction yields a single solution which has [gt]80% [ital s]-wave ([ital E]1) capture strength, whereas two TME solutions exist for the [sup 3]H([ital [rvec d]],[gamma])[sup 5]He reaction with 45% and 65% [ital s]-wave ([ital E]1) capture strength. These data are also compared to the results of the CCRGM calculations.

• DOE Contract Number: FG05-91ER40619
• OSTI ID: 5194249
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 49:2; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

663440* -- D-
T-
& He-induced Reactions & Scattering-- (1992-)
663510 -- Nuclear Mass Ranges-- A=1-5-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALI METAL ISOTOPES
ALPHA DECAY RADIOISOTOPES
ANALYZING POWER
BEAMS
CAPTURE
CHARGED-PARTICLE REACTIONS
COUPLED CHANNEL THEORY
CROSS SECTIONS
DEUTERON REACTIONS
DIFFERENTIAL CROSS SECTIONS
EVEN-ODD NUCLEI
GAMMA SPECTRA
HELIUM 3 TARGET
HELIUM 5
HELIUM ISOTOPES
ISOTOPES
LIGHT NUCLEI
LITHIUM 5
LITHIUM ISOTOPES
NUCLEAR REACTIONS
NUCLEI
ODD-EVEN NUCLEI
POLARIZED BEAMS
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SPECTRA
TARGETS
TRITIUM TARGET