Measurement of the 183 keV resonance in {sup 17}O(p,{alpha}){sup 14}N using a novel technique

Journal Article · Fri Jun 15 00:00:00 EDT 2007 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.75.065801· OSTI ID:21003501

Moazen, B H; Chae, K Y; Hix, W R; Lingerfelt, E J; Nesaraja, C D ^[1]; Bardayan, D W; Blackmon, J C; Roberts, L F; Smith, M S ^[1]; Chipps, K; Greife, U; Livesay, R J ^[2]; Domizioli, C P; Kozub, R L; Shriner, Jr, J F ^[3]; Fitzgerald, R ^[4]; Jones, K L ^[5]; Pain, S D; Thomas, J S ^[6]

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1. Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
2. Department of Physics, Colorado School of Mines, Golden, Colorado 80401 (United States)
3. Department of Physics, Tennessee Technological University, Cookeville, Tennessee 38505 (United States)
4. Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27599 (United States)
5. Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996 (United States)
6. Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854 (United States)

We have developed a novel technique for measurements of low-energy (p,{alpha}) reactions using heavy-ion beams and a differentially pumped windowless gas target. We applied this new approach to study the 183 keV resonance in the {sup 17}O(p,{alpha}){sup 14}N reaction. We report a (center-of-mass) resonance energy of E{sub r}=183.5(+0.1/-0.4) keV and a resonance strength of {omega}{gamma}{sub p{alpha}}=(1.70{+-}0.15) meV, and we set an upper limit (95% confidence) on the total width of the state of {gamma}<0.1 keV. This resonance is important for the {sup 17}O(p,{alpha}){sup 14}N reaction rate, and we find that {sup 18}F production is significantly decreased in low-mass ONeMg novae but less affected in more energetic novae. We also report the first determination of the stopping power for oxygen ions in hydrogen gas near the peak of the Bragg curve (E=193 keV/u) to be (63{+-}1)x10{sup -15} eV cm{sup 2}.

• OSTI ID: 21003501
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 75, Issue 6; Other Information: DOI: 10.1103/PhysRevC.75.065801; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA PARTICLES
BRAGG CURVE
EV RANGE
FLUORINE 18
HEAVY IONS
HYDROGEN
MASS NUMBER
MEV RANGE
NITROGEN 14
NOVAE
OXYGEN 17
OXYGEN IONS
PROTON REACTIONS
PROTON-NUCLEON INTERACTIONS
REACTION KINETICS
RESONANCE
STOPPING POWER