Measurement of the {sup 19}F(p,{gamma}){sup 20}Ne reaction and interference terms from E{sub c.m.}=200-760 keV

Journal Article · Tue Jan 15 04:00:00 EST 2008 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.77.015802· OSTI ID:21068080

Couture, A; Beard, M; Couder, M; Goerres, J; Lamm, L; LeBlanc, P J; Lee, H Y; O'Brien, S; Palumbo, A; Stech, E; Strandberg, E; Tan, W; Uberseder, E; Ugalde, C; Wiescher, M; Azuma, R ^[1]

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1. Nuclear Science Laboratory, University of Notre Dame, Notre Dame, Indiana 46556 (United States)

The {sup 19}F(p,{gamma}){sup 20}Ne reaction represents the only breakout path for the carbon-nitrogen-oxygen cycle operating at temperatures below T=0.1 GK, an energy regime important for main-sequence hydrogen burning as well as hydrogen burning in asymptotic giant branch stars. Large experimental uncertainties exist due to unknown low energy direct and resonant reaction contributions that have been difficult to study because of the high {gamma}-ray background from the {sup 19}F(p,{alpha}{sub 2}{gamma}) reaction. A new detection technique has been developed at the University of Notre Dame to measure the {sup 19}F(p,{gamma}) and {sup 19}F(p,{alpha}{sub i}{gamma}) reactions over an energy range of E{sub c.m.}=200-760 keV. The analysis was carried out in a Breit-Wigner framework. This allowed a new determination of the resonance parameters as well as a first measurement of the signs of the interference terms. Partial widths and resonance strengths are reported for the resonances in this region.

• OSTI ID: 21068080
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 1 Vol. 77; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA PARTICLES
ASYMPTOTIC SOLUTIONS
BREIT-WIGNER FORMULA
CNO CYCLE
FLUORINE 19
FLUORINE 19 TARGET
GAMMA RADIATION
HYDROGEN BURNING
INTERFERENCE
KEV RANGE
NEON 20
PROTON REACTIONS
RESONANCE