Polarized d + sup 3 He capture into the 3/2 spl fusion resonance of sup 5 Li and the role of the tensor force

Journal Article · Fri Jan 31 23:00:00 EST 1992 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.45.R487· OSTI ID:7048017

Balbes, M J; 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 section and analyzing powers {ital A}{sub {ital y}}({theta}), {ital A}{sub {ital y}{ital y}}({theta}), and {ital T}{sub 20}({theta}) of the {sup 3}He({ital {rvec d}},{gamma}){sup 5}Li reaction have been measured with an 800 keV deuteron beam which was stopped in a gaseous {sup 3}He target. A transition matrix element analysis of the data leads to two solutions, both of which indicate the reaction proceeds predominantly through {ital s}-wave ({ital E}1) capture, with small admixtures of {ital M}1 radiation. One solution has predominantly {sup 4}{ital s}{sub 3/2}({ital E}1) capture strength, the other has nearly equal capture strengths from the {sup 2}{ital s}{sub 1/2}({ital E}1) and {sup 4}{ital s}{sub 3/2}({ital E}1) transition matrix elements. Resonating group model (RGM) calculations have been performed which favor the solution with dominant {sup 4}{ital s}{sub 3/2}({ital E}1) capture strength. In the RGM picture, the fusion'' resonance in the capture cross section is a consequence of the tensor force, which couples the ({ital d}+{sup 3}He){sub {ital J}=3/2}{sup {ital S}=3/2} scattering channel to the ({ital p}+{sup 4}He){sub {ital J}=3/2}{sup {ital S}=1/2} scattering channel, enabling the reaction to proceed via the {Delta}{ital S}=0 ({ital E}1) transition to the ground state. The finite tensor analyzing powers of the present experiment serve to support this interpretation of the role of the tensor force.

• OSTI ID: 7048017
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 45:2; ISSN 0556-2813; ISSN PRVCA
• 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
CAPTURE
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
DEUTERON REACTIONS
DIFFERENTIAL CROSS SECTIONS
DIRECT REACTIONS
E1-TRANSITIONS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EXPERIMENTAL DATA
GAMMA SPECTRA
HELIUM 3 TARGET
INFORMATION
ISOTOPES
KEV RANGE
KEV RANGE 100-1000
LIGHT NUCLEI
LITHIUM 5
LITHIUM ISOTOPES
M1-TRANSITIONS
MULTI-NUCLEON TRANSFER REACTIONS
MULTIPOLE TRANSITIONS
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
RADIOISOTOPES
RESONATING-GROUP METHOD
SECONDS LIVING RADIOISOTOPES
SPECTRA
TARGETS
TRANSFER REACTIONS
TWO-NUCLEON TRANSFER REACTIONS
VARIATIONAL METHODS