Capture rate of the Li-7(n, gamma)Li-8 reaction by prompt gamma-ray detection

Details Capture rate of the Li-7(n, gamma)Li-8 reaction by prompt gamma-ray detection Capture rate of the Li-7(n, gamma)Li-8 reaction by prompt gamma-ray detection

Nov 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...381..444n&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 381, Nov. 10, 1991, p. 444-448. Research supported by Toray Science Foundat

Astronomy and Astrophysics

Astrophysics

36

Big Bang Cosmology, Gamma Ray Astronomy, Neutron Distribution, Nuclear Astrophysics, Baryons, Capture Effect, Gluons, Hadrons, Lithium, Quarks, Solar Neutrinos

Scientific paper

The reaction Li-7(n, gamma)Li-8 is a trigger reaction which bridges the instability gap at mass 8 while producing heavy elements during the rapid process of primordial nucleosynthesis in the inhomogeneous big-bang models. The reaction rate was remeasured at the most probable neutron energy of 30 keV by detecting prompt gamma-rays from a captured state; 39.3 +/-6.0 micro-b was obtained. This value is 2 times larger than that recently measured and agrees with the estimated value from the thermal neutron capture cross section by using the 1/v law. The result is discussed in terms of both nucleosynthesis and the solar neutrino problem.

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