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The (p,p. cap alpha. ) and (. cap alpha. ,2. cap alpha. ) reactions on /sup 6/Li and /sup 7/Li at 60 MeV

Technical Report ·
OSTI ID:6639607
; ; ;
An investigation of the alpha cluster knockout reaction has been made by studying the /sup 6,7/Li(p,p..cap alpha..)/sup 2,3/H and the /sup 6,7/Li(..cap alpha..,2..cap alpha..)/sup 2,3/H reactions using approximately 60 MeV incident particles. Both energy sharing and angular correlation experiments have been performed near a quasi-free angle pair, and alpha cluster momentum distributions vertical bar /phi(q)//sup 2/ extracted by means of the plane wave impulse approximation. The momentum distributions extracted from the (p,p..cap alpha..) reactions for the two experimental techniques are in good agreement and have the shape expected for the knockout of an L = O ..cap alpha..-cluster from /sup 6/Li and an L = 1 ..cap alpha..-cluster from /sup 7/Li. The shapes of the vertical bar /phi(q)//sup 2/ extracted from the (..cap alpha..,2..cap alpha..) energy sharing experiments are in reasonably good agreement with the (p,p..cap alpha..) results; the agreement in magnitude being within the experimental uncertainties. However, the angular correlation results for /sup 7/Li(..cap alpha..,2..cap alpha..)/sup 3/H show large discrepancies, casting doubt on the analysis of the (..cap alpha..,2..cap alpha..) reaction with the normal impulse approximation. A discussion of the effects of various methods of making the quasi-free approximation is given. 25 refs., 16 figs., 2 tabs.
Research Organization:
Maryland Univ., College Park (USA). Dept. of Physics and Astronomy
DOE Contract Number:
AC05-76ER03491
OSTI ID:
6639607
Report Number(s):
DOE/ER/03491-T5; TR-70-086; ON: DE87007142
Country of Publication:
United States
Language:
English

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Related Subjects

651320* -- Nuclear Properties & Reactions
A=6-19
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA REACTIONS
ANGULAR CORRELATION
BARYON REACTIONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CHARGED-PARTICLE REACTIONS
CORRELATIONS
CROSS SECTIONS
DATA
DEUTERIUM
DIFFERENTIAL CROSS SECTIONS
DIRECT REACTIONS
ENERGY RANGE
ENERGY SPECTRA
EXPERIMENTAL DATA
HADRON REACTIONS
HYDROGEN ISOTOPES
INFORMATION
ISOTOPES
KNOCK-OUT REACTIONS
LIGHT NUCLEI
LINEAR MOMENTUM
LITHIUM 6 TARGET
LITHIUM 7 TARGET
MEV RANGE
MEV RANGE 10-100
MOMENTUM TRANSFER
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUMERICAL DATA
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PROTON REACTIONS
RADIOISOTOPES
SPECTRA
STABLE ISOTOPES
TARGETS
TRITIUM
YEARS LIVING RADIOISOTOPES