Measurement of the internal pair emission branch of the 7. 654-MeV state of /sup 12/C, and the rate of the stellar triple-. cap alpha. reaction

Journal Article · Tue Mar 01 00:00:00 EST 1977 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.15.1072· OSTI ID:7228632

Robertson, R G.H.; Warner, R A; Austin, S M

The internal pair decay of the 0/sup +/ 7.65-MeV state of /sup 12/C has been observed in coincidence with inelastic protons from /sup 12/C(p,p')/sup 12/C(7.65), using a plastic scintillator of essentially 4..pi.. sr solid angle. The branching ratio measured, GAMMA/sub ..pi..//GAMMA = (6.0 +- 1.1) x 10/sup -6/, is in excellent agreement with the previous measurement by Alburger, and reduces the uncertainty in the stellar triple-..cap alpha.. reaction rate by almost a factor of 2. Implications for the astrophysical production of /sup 12/C and /sup 16/O are discussed.

• Research Organization: Cyclotron Laboratory and Physics Department, Michigan State University, East Lansing, Michigan 48824
• OSTI ID: 7228632
• Journal Information: Phys. Rev., C; (United States), Vol. 15:3
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CARBON 12
ENERGY-LEVEL TRANSITIONS
INTERNAL PAIR PRODUCTION
CARBON 12 TARGET
PROTON REACTIONS
INELASTIC SCATTERING
STAR MODELS
NUCLEOSYNTHESIS
BRANCHING RATIO
MEV RANGE 01-10
OXYGEN 16
BARYON REACTIONS
CARBON ISOTOPES
CHARGED-PARTICLE REACTIONS
ENERGY RANGE
EVEN-EVEN NUCLEI
HADRON REACTIONS
INTERACTIONS
ISOTOPES
LIGHT NUCLEI
MATHEMATICAL MODELS
MEV RANGE
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
OXYGEN ISOTOPES
PAIR PRODUCTION
SCATTERING
STABLE ISOTOPES
TARGETS
651323* - Nuclear Properties & Reactions
A=6-19
Experimental- Energy Levels & Transitions- (-1987)
640102 - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources