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9.0-Mev GAMMA-EMITTING LEVEL IN C$sup 1$$sup 2$

Journal Article · · Physical Review (U.S.) Superseded in part by Phys.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
;
An energy level in C/sup 12/ at 9.0 plus or minus 0.1 Mev was detected by means of (p, gamma , gamma ) coincidence measurements on the B/sup 10/ (He/sup 3/,p)C/sup 12/ reaction at EHe/sup 3/ = 2.2 Mev. This state decays by a gamma - gamma cascade through the 4.43 Mev first excited state. An upper limit of 5% is placed on the ground-state gamma transition. The intensity of the proton group leading to the 9.0 Mev state (followed by gamma emission) is (0.21 plus or minus 0.07)% relative to the proton branch to the 4.43 Mev level. Gamma branches from the 15.10 and 12.78 Mev states in C/sup 12/ to the 4.43 Mev level were determined as (4 plus or minus 1)% and (20 plus or minus 7)%, respectively, relative to the corresponding ground-state transitions. The radiations from the 9.0 Mev level prevented a sensitive search from being made for the 3.2 Mev gamma radiation from the 7.66 Mev level in C/sup 12/ by means of this reaction. (auth)
Research Organization:
Brookhaven National Lab., Upton, N.Y.
NSA Number:
NSA-14-024893
OSTI ID:
4139487
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Physical Review (U.S.) Superseded in part by Phys.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 D, Journal Name: Physical Review (U.S.) Superseded in part by Phys.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: 119; ISSN PHRVA
Country of Publication:
Country unknown/Code not available
Language:
English

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Related Subjects

BORON 10
CARBON 12
COINCIDENCE METHODS
EMISSION
ENERGY LEVELS
GAMMA RADIATION
HELIUM 3
ION BEAMS
MEASURED VALUES
NUCLEAR REACTIONS
PHYSICS
PROTONS
TRANSIENTS