RADIATIVE CAPTURE OF PROTONS BY Be$sup 9$
Journal Article
·
· Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D
The gamma rays from the capture in Besup 9/ of protons of energy between 0.27 and 1.2 Mev were studied using large scintillation crystals. Excitation functions of the gamma rays leading to the 0-. 0.72- 1.74-. 2.15-. 3.58- and 5.16Mev states of B/sup 10/ were computed from the measured gamma-ray spectra. In addition to the resonances previously known to exist at 0.33-, 0.99-, and 1.086-Mev proton energy STAcorresponding to (1-) 6.88- (2-) 7.48and (0/sup +/) 7.56-Mev states in B/sup 10/!, evidence was found only for the p-wave resonance near 1 Mev STA(2/sup +/) 7.5-Mev state in B/sup 10! postulated by Mozer and by Dearnaly and for the influence of higher lying states. This work leaves unexplained the large isotopic-spin impurity of the 6.88-Mev level. Appreciable nonresonant capture was found for the transitions to the 0-, 0.72-, 3.58-, and 5.16-Mev states, which is probably not s-wave for the latter two transitions. Accurate energy measurements and coincidence work showed that the 5.16-Mev level of B/sup 10/ is populated in preference to the 5.11-Mev level, contradicting earlier work of Clegg. Also, experimental evidence was found which appears to be in contradiction to the 0/sup +/ spin assignment for the 7.56-Mev level of B/sup 10/ and raises doubts about the 2/sup +/ spin assignment of the 5.16-Mev level. (auth)
- Research Organization:
- Stanford Univ., Calif.; Carnegie Inst. of Washington, D.C.; and California Inst. of Tech., Pasadena; Office of the Chief of Ordnance, Washington, D.C.
- NSA Number:
- NSA-14-003028
- OSTI ID:
- 4226642
- 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- Physical Review (U.S.) Superseded in part by Phys.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 D, Journal Name: Physical Review (U.S.) Superseded in part by Phys.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: 115; ISSN PHRVA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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Related Subjects
BERYLLIUM 9-- BORON 10-- CAPTURE-- ENERGY RANGE-- GAMMA RADIATION-- MEASURED VALUES-- NUCLEAR REACTIONS-- PROTON BEAMS
BORON 10-- COINCIDENCE METHODS-- ENERGY-- ENERGY LEVELS-- MEASURED VALUES
BORON 10-- CROSS SECTIONS-- ENERGY LEVELS-- EXCITATION-- GAMMA RADIATION-- MEASURED VALUES-- P-WAVE-- QUANTUM MECHANICS-- RESONANCE-- SPECTRA
BORON 10-- ENERGY LEVELS-- ISOSPIN-- MEASURED VALUES-- NUCLEAR MODELS
BORON 10-- ENERGY LEVELS-- MEASURED VALUES-- SPIN
CRYSTALS-- MEASURED VALUES-- SCINTILLATION COUNTERS
PHYSICS
BORON 10-- COINCIDENCE METHODS-- ENERGY-- ENERGY LEVELS-- MEASURED VALUES
BORON 10-- CROSS SECTIONS-- ENERGY LEVELS-- EXCITATION-- GAMMA RADIATION-- MEASURED VALUES-- P-WAVE-- QUANTUM MECHANICS-- RESONANCE-- SPECTRA
BORON 10-- ENERGY LEVELS-- ISOSPIN-- MEASURED VALUES-- NUCLEAR MODELS
BORON 10-- ENERGY LEVELS-- MEASURED VALUES-- SPIN
CRYSTALS-- MEASURED VALUES-- SCINTILLATION COUNTERS
PHYSICS