/sup 2/H(d-italic-arrow-right,. gamma. )/sup 4/He reaction at E/sub d/ = 95 MeV

Journal Article · Mon May 01 00:00:00 EDT 1989 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.39.1679· OSTI ID:6166969

Pitts, W K; Meyer, H O; Bland, L C; Brown, J D; Byrd, R C; Hugi, M; Karwowski, H J; Schwandt, P; Sinha, A; Sowinski, J; others, and

The tensor analyzing power A/sub y//sub y/(theta), vector analyzing power A/sub y/(theta), and cross section sigma(theta) of the /sup 2/H(d-italic-arrow-right,..gamma..)/sup 4/He reaction have been measured for the angular range of 55/sup 0/--149/sup 0/ in the center of mass system at an incident deuteron energy of 95 MeV. The reaction is dominated by the transition involving the S-state component of /sup 4/He, as indicated by the approximately sin/sup 2/2theta angular distribution of the cross section. The observed deviation of sigma(theta) from this shape is due to either M2 strength, tensor force effects, or both. The tensor analyzing power A/sub y//sub y/(theta) is nearly isotropic, with a typical value of approximately 0.3 +- 0.1. The vector analyzing power A/sub y/ is zero within the statistical precision (typically +- 0.2) of this data set, indicating a reduced contribution from E1 and M2 transitions compared to lower energies. Direct capture calculations in the plane-wave Born approximation do not reproduce even the sign of A/sub y//sub y/.

• Research Organization: Indiana University Cyclotron Facility, Bloomington, Indiana 47405
• OSTI ID: 6166969
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 39:5; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651220* -- Nuclear Properties & Reactions
A=1-5
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
ANALYZING POWER
ANGULAR DISTRIBUTION
BEAMS
BORN APPROXIMATION
CAPTURE
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
CYCLIC ACCELERATORS
CYCLOTRONS
DEUTERIUM TARGET
DEUTERON REACTIONS
DISTRIBUTION
E1-TRANSITIONS
ELECTROMAGNETIC RADIATION
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
GAMMA RADIATION
HELIUM 4
HELIUM ISOTOPES
IONIZING RADIATIONS
ISOCHRONOUS CYCLOTRONS
ISOTOPES
IU CYCLOTRON
LIGHT NUCLEI
M2-TRANSITIONS
MEV RANGE
MEV RANGE 10-100
MULTIPOLE TRANSITIONS
NUCLEAR REACTIONS
NUCLEI
POLARIZED BEAMS
RADIATIONS
S STATES
STABLE ISOTOPES
TARGETS
TENSOR FORCES