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Capture rate of the Li-7(n, gamma)Li-8 reaction by prompt gamma-ray detection
The Astrophysical Journal1991Vol. 381, pp. 444–444
Citations Over TimeTop 16% of 1991 papers
Y. Nagai, M. Igashira, Naruhiko Mukai, T. Ohsaki, F. Uesawa, Keizo Takeda, T. Ando, H. Kitazawa, S. Kubono, Tomokazu Fukuda
Abstract
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.