Astrophysical [ital S] factor of [sup 12]C([alpha],[gamma])[sup 16]O from the beta-delayed alpha-particle emission of [sup 16]N

Journal Article · Mon Apr 05 04:00:00 EDT 1993 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.70.2066· OSTI ID:6654236

Zhao, Z; France, III, R H; Lai, K S; Rugari, S L; Gai, M ^[1]; Wilds, E L ^[2]

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1. A. W. Wright Nuclear Structure Laboratory, Department of Physics, Yale University, New Haven, Connecticut 06511 (United States)
2. Department of Physics, The University of Connecticut, Storrs, Connecticut, 06268 (United States)

The spectrum of low energy beta-delayed alpha-particle emission of [sup 16]N was measured with high sensitivity; e.g., at [ital E][sub [alpha]][sup [ital L]][approx]1 MeV, a sensitivity for a beta-decay branching ratio in the range of 10[sup [minus]9] (to 10[sup [minus]10]) was achieved. We used previous theoretical work of Ji, Filippone, Humblet, and Koonin to extract from these data the astrophysical [ital p]-wave [ital S] factor for the [sup 12]C ([alpha],[gamma])[sup 16]O capture reaction, and find [ital S][sub [ital E]1](300)=95[plus minus]6(stat)[plus minus]28(syst) keV b. This result is crucial, for example, for understanding the last stages of a massive star before a supernova.

• DOE Contract Number: FG02-91ER40609
• OSTI ID: 6654236
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 70:14; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA REACTIONS
ASTROPHYSICS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BRANCHING RATIO
CAPTURE
CARBON 12 TARGET
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
E1-TRANSITIONS
E2-TRANSITIONS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
ERUPTIVE VARIABLE STARS
EXPERIMENTAL DATA
INFORMATION
ISOTOPES
LIGHT NUCLEI
MEV RANGE
MEV RANGE 01-10
MULTIPOLE TRANSITIONS
NITRATES
NITROGEN 16
NITROGEN COMPOUNDS
NITROGEN ISOTOPES
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
OXYGEN COMPOUNDS
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
STARS
SUPERNOVAE
TARGETS
TIME-OF-FLIGHT METHOD
TITANIUM COMPOUNDS
TITANIUM NITRATES
TRANSITION ELEMENT COMPOUNDS
VARIABLE STARS