C$sup 12$(n,/cap alpha/)Be$sup 9$ REACTION INDUCED BY 14-Mev NEUTRONS

Journal Article · Wed May 15 04:00:00 EDT 1963 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.130.1500· OSTI ID:4713305

Al-Kital, R A; Peck, Jr, R A

The reaction C/sup 12/(n, alpha )Be/sup 9/ was studied with emulsions. Total cross section for the forward hemisphere (lab) and first 5-Mev excitation is 144 450 deg C in a 57 mb, of which 62 450 deg C in a 15 mb is associated with the ground-state group. These are consistent with earlier estimates, and with measured values for the inverse process. Angular distributions of the ground and 2.4-Mev excited state groups have the direct interaction form, and a spin of 3/2 is indicated for the excited state. This value supports earlier argwnents for LS coupling in Be/sup 9/ and suggests that the 2.4-Mev state consists of Be/sup 8/ in its first excited state and a p-state neutron. Comparison of the ratio of reduced widths, for transitions to the 0.0- and 2.4- Mev states, with an estimate of the ratio of the corresponding coefficients of fractional parentage, favors a knockout mechanism. (auth)

• Research Organization: Brown Univ., Providence
• NSA Number: NSA-17-022614
• OSTI ID: 4713305
• Report Number(s): TID-17029; 0031-899X
• Journal Information: Physical Review (U.S.) Superseded in part by Phys.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 D, Journal Name: Physical Review (U.S.) Superseded in part by Phys.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: 130; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALPHA PARTICLES
ANGULAR DISTRIBUTION
BERYLLIUM 8
BERYLLIUM 9
CARBON 12
CROSS SECTIONS
EMULSIONS
ENERGY LEVELS
ENERGY RANGE
EXCITATION
FAST NEUTRONS
INTERACTIONS
NEUTRONS
NUCLEAR REACTIONS
PHYSICS
SPIN
TRANSIENTS
TRANSITIONS
WIDTH