[sup 3]H([alpha],[gamma])[sup 7]Li reaction at low energies
Journal Article
·
· Physical Review, C (Nuclear Physics); (United States)
- W. K. Kellogg Radiation Laboratory, 106-38, California Institute of Technology, Pasadena, California 91125 (United States)
The absolute cross section of the [sup 3]H([alpha],[gamma])[sup 7]Li reaction has been measured for 50[le][ital E][sub c.m.][le]1200 keV. Specially prepared [sup 3]H targets were bombarded with an [alpha][sup +] beam, and [gamma] rays were detected using an 85% high-purity germanium detector. Total [ital S] factors and the branching ratios for radiative capture to the two final bound states are reported for the entire energy range. Angular distributions of the capture [gamma] rays were measured for nine energies in the range 115[le][ital E][sub c.m.][le]1200 keV. Legendre coefficients extracted from fits to the angular distributions are also reported. The energy dependence of the measured [ital S] factors is found to be in agreement with existing theoretical calculations. The new results are used to calculate the thermonuclear reaction rate for temperatures below 10 GK, required for computing the [sup 7]Li abundance in primordial nucleosynthesis.
- OSTI ID:
- 6962461
- Journal Information:
- Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 50:4; ISSN 0556-2813; ISSN PRVCAN
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
662440* -- Properties of Other Particles Including Hypothetical Particles-- (1992-)
663220 -- Electromagnetic Transitions-- (1992-)
663510 -- Nuclear Mass Ranges-- A=1-5-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALI METAL ISOTOPES
ALPHA REACTIONS
ANGULAR DISTRIBUTION
CAPTURE
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DISTRIBUTION
ELECTROMAGNETIC RADIATION
ENERGY DEPENDENCE
ENERGY RANGE
GAMMA RADIATION
INTEGRAL CROSS SECTIONS
IONIZING RADIATIONS
ISOTOPES
KEV RANGE
KEV RANGE 10-100
KEV RANGE 100-1000
LIGHT NUCLEI
LITHIUM 7
LITHIUM ISOTOPES
MEV RANGE
MEV RANGE 01-10
NUCLEAR REACTIONS
NUCLEI
ODD-EVEN NUCLEI
RADIATIONS
STABLE ISOTOPES
TARGETS
TRITIUM TARGET
663220 -- Electromagnetic Transitions-- (1992-)
663510 -- Nuclear Mass Ranges-- A=1-5-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALI METAL ISOTOPES
ALPHA REACTIONS
ANGULAR DISTRIBUTION
CAPTURE
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DISTRIBUTION
ELECTROMAGNETIC RADIATION
ENERGY DEPENDENCE
ENERGY RANGE
GAMMA RADIATION
INTEGRAL CROSS SECTIONS
IONIZING RADIATIONS
ISOTOPES
KEV RANGE
KEV RANGE 10-100
KEV RANGE 100-1000
LIGHT NUCLEI
LITHIUM 7
LITHIUM ISOTOPES
MEV RANGE
MEV RANGE 01-10
NUCLEAR REACTIONS
NUCLEI
ODD-EVEN NUCLEI
RADIATIONS
STABLE ISOTOPES
TARGETS
TRITIUM TARGET