The Li/sup 6/(. cap alpha. ,2. cap alpha. )d reaction at 50 to 80 MeV

Technical Report · Thu Jan 01 04:00:00 EST 1970

OSTI ID:6912405

Watson, J W

The Li/sup 6/(..cap alpha..,2..cap alpha..)d reaction was studied at 50.4, 59.0, 60.5, 70.3 and 79.6 MeV bombarding energy. For each bombarding energy, several coincident energy spectra of the two emitted ..cap alpha..-particles were measured. The projected energy spectra were analyzed with the Plane Wave Impulse Approximation. From those points in the projected spectra which corresponded to zero deuteron recoil momentum, off-mass-shell ..cap alpha..-..cap alpha.. scattering cross sections were extracted. These were found to be in excellent agreement with free ..cap alpha..-..cap alpha.. scattering cross sections, if free cross sections for the final state center of mass energy of the two ..cap alpha..'s in the Li/sup 6/(..cap alpha...2..cap alpha..)d reactions were chosen for the comparison. Off-mass-shell ..cap alpha..-..cap alpha.. cross sections were also extracted for data where the residual deuteron had a momentum of 30 MeV/c. These cross sections were also found to agree with free ..cap alpha..-..cap alpha.. scattering, but it was necessary to introduce an ad hoc shift in the ..cap alpha..-..cap alpha.. scattering angle to produce this agreement. Using the Plane Wave Impulse Approximation a momentum distribution for ..cap alpha..'s in Li/sup 6/ was extracted from the experimental data. For comparison with the experimental data, the momentum wave function of the ..cap alpha..-particle in Li/sup 6/ was calculated by taking the Fourier transform of the ..cap alpha..-d relative motion. The theoretical and experimental momentum distributions were found to be in serious disagreement, both in magnitude and width at half maximum. By introducing a cut-off radius into the theoretical wave function, the discrepancies between theory and experiment were accounted for. 66 refs., 58 figs., 6 tabs.

• Research Organization: Maryland Univ., College Park (USA). Dept. of Physics and Astronomy
• DOE Contract Number: AC05-76ER03491
• OSTI ID: 6912405
• Report Number(s): DOE/ER/03491-T1; ON: DE87001472
• Country of Publication: United States
• Language: English

Related Subjects

651320* -- Nuclear Properties & Reactions
A=6-19
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA REACTIONS
ALPHA SPECTRA
ANGULAR DISTRIBUTION
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
CLUSTER MODEL
COINCIDENCE METHODS
COUNTING TECHNIQUES
CROSS SECTIONS
DATA
DEUTERONS
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
ELASTIC SCATTERING
ENERGY RANGE
ENERGY SPECTRA
EXPERIMENTAL DATA
FOURIER TRANSFORMATION
IMPULSE APPROXIMATION
INFORMATION
INTEGRAL TRANSFORMATIONS
KINETICS
LINEAR MOMENTUM
LITHIUM 6 TARGET
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
NUCLEAR MODELS
NUCLEAR PROPERTIES
NUCLEAR RADII
NUCLEAR REACTIONS
NUMERICAL DATA
REACTION KINETICS
SCATTERING
SPECTRA
TARGETS
THEORETICAL DATA
TRANSFORMATIONS