Level matrix, sup 16 N. beta. decay, and the sup 12 C(. alpha. ,. gamma. ) sup 16 O reaction

Journal Article · Sun Dec 01 04:00:00 EST 1991 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.44.2530· OSTI ID:5081882

Humblet, J; Filippone, B W; Koonin, S E ^[1]

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1. W. K. Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125 (United States)

The level matrix corresponding to the {ital scrK}-matrix parametrization of a resonant nuclear reaction is derived and applied to the spectrum of {alpha} particles emitted following {sup 16}N {beta} decay. The parametrized spectrum is fitted to data simultaneously with the {ital E}1 capture cross section of the {sup 12}C({alpha},{gamma}){sup 16}O reaction and the {ital p}-wave phase shift of {sup 12}C({alpha},{alpha}){sup 12}C. Our analysis shows that new measurements of the {alpha} spectrum from {sup 16}N {beta} decay could be used to significantly reduce the uncertainty of the {sup 12}C({alpha},{gamma}){sup 16}O astrophysical {ital S} factor at 0.3 MeV. Various constraints on the parameters are analyzed and suggestions are made for further reducing the uncertainty in this crucial reaction rate.

• OSTI ID: 5081882
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 44:6; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA REACTIONS
ALPHA SPECTRA
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY
BETA-MINUS DECAY RADIOISOTOPES
CAPTURE
CARBON 12 TARGET
CHARGED-PARTICLE REACTIONS
DECAY
ELASTIC SCATTERING
EVEN-EVEN NUCLEI
ISOTOPES
K MATRIX
LIGHT NUCLEI
MATRICES
NITROGEN 16
NITROGEN ISOTOPES
NUCLEAR DECAY
NUCLEAR REACTIONS
NUCLEI
ODD-ODD NUCLEI
OXYGEN 16
OXYGEN ISOTOPES
PHASE SHIFT
RADIOISOTOPES
SCATTERING
SECONDS LIVING RADIOISOTOPES
SPECTRA
STABLE ISOTOPES
TARGETS