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INVESTIGATION OF THE Be$sup 9$(p,n)B$sup 9$ AND Be$sup 9$(p,/cap alpha/ $gamma$)Li$sup 6$ REACTIONS

Journal Article · · Physical Review (U.S.) Superseded in part by Phys.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
;
A pulsed-beam time-of-flight technique was used to study neutrons and gamma rays from the proton bombardment of Be/sup 9/ in the energy range from 2.3 to 5.4 Mev. Excitation curves for the ground-state neutron group from the Be/sup 9/(p,n)B/sup 9/ reaction were measured at O deg and 90 deg . These curves show the well-known resonances at 2.56 and 4.6 Mev and, in addition, show a broad maximum near 3.5 Mev. The gamma -ray excitation curve also indicates maxima at 2.56, 3.5, ard 4.5 Mev. The 3.5- and 4.6-Mev resonances are tentatively assigned to p- and d-wave states having (J = 2/sup +/, T = 1) and (J = 3/sup -/, T = l), respectively. The previously observed maximum near 4.9 Mev appears to be the result of the effect of the 3.5-Mev resonance on the n/sub 1/ group immediately above its threshold. The cross section for the production of continuum neutrons is appreciable for proton energies above about 3 Mev. A large fraction of these neutrons appear to result from the neutron decay of the 2.43-Mev Beg level following the inelastic excitation of this level. (auth)
Research Organization:
Los Alamos Scientific Lab., N. Mex.; and Univ. of Maryland, College Park; Los Alamos Scientific Lab., N. Mex.
NSA Number:
NSA-13-022927
OSTI ID:
4201376
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Physical Review (U.S.) Superseded in part by Phys.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 D, Journal Name: Physical Review (U.S.) Superseded in part by Phys.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

ALPHA PARTICLES
BERYLLIUM 9
BORON 9
CROSS SECTIONS
DECAY
ENERGY LEVELS
ENERGY RANGE
EXCITATION
GAMMA RADIATION
INELASTIC SCATTERING
LITHIUM 6
MEASURED VALUES
MEV RANGE
NEUTRON SPECTROMETERS
NEUTRONS
NUCLEAR REACTIONS
PHYSICS AND MATHEMATICS
PROTON BEAMS
PULSES
RESONANCE
SCATTERING
SPECTRA
VELOCITY