CROSS SECTIONS FOR THE LI$sup 7$(n,$gamma$)Li$sup 8$ REACTION
The neutron radiative capture cross section of Li/sup 7/ was measured for neutron energies between 40 and 1000 kev and at thermal energy. The reaction was detected by observing the beta decay of Li/sup 8/ in a natural LiI crystal exposed to a fiux of monoenergetic neutrons. The cross sections for the Li/sup 7/ (n, gamma ) Li/sup 8/ reaction were obtained relative to the known cross sections for the Li/sup 6/(n,t)He/sup 4/ and the I/sup 127/(n, gamma )I/sup 128/ reactions which also took place in the crystal. The Li/sup 7/(n, gamma ) cross section decreases from a value of 50 x 10/sup -6/barn at 40 kev to 5 x 10/sup -6/barn at 1000 kev. A maximum in the cross section was found at 250 kev, corresponding to a known level in Li/sup 8/ at 2.28 Mev. The observed radiation width of this level was 0.07 plus or minus 0.03 ev. (auth)
- Research Organization:
- Lockheed Missile Systems Div. Research Lab., Palo Alto, Calif.
- NSA Number:
- NSA-13-018533
- OSTI ID:
- 4258691
- Journal Information:
- Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 114; ISSN PHRVA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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