Measurement of the 183 keV Resonance in ¹⁷O(p,alpha)¹⁴N using a Novel Technique

Journal Article · Mon Jan 01 00:00:00 EST 2007 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.75.065801· OSTI ID:931768

Moazen, Brian H ^[1]; Bardayan, Daniel W ^[1]; Blackmon, Jeff C ^[1]; Chae, Kyung Yuk ^[1]; Chipps, Kelly A ^[1]; Domizioli, Carlo P ^[1]; Fitzgerald, Ryan ^[1]; Greife, Uwe ^[1]; Hix, William Raphael ^[1]; Grzywacz-Jones, Kate L ^[1]; KOZUB, RAYMOND L ^[1]; Lingerfelt, Eric J ^[1]; Livesay, Jake ^[1]; Nesaraja, Caroline D ^[1]; Pain, Steven D ^[1]; Roberts, Luke F ^[1]; Smith, Michael Scott ^[1]; Thomas, Jeffrey S ^[1]

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1. ORNL

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 17O(p,alpha)14}N reaction. We report a resonance energy (center-of-mass) of 183.5{+0.1}{-0.4} keV, a resonance strength of 1.70 +/- 0.15 meV, and set an upper limit (95\% confidence) on the total width of the state of < 0.1 keV. This resonance is important for the 17O(p,alpha)14}N reaction rate, and we find that 18F 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)e-15 eV-cm2.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Holifield Radioactive Ion Beam Facility (HRIBF)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 931768
• Journal Information: Physical Review C, Vol. 75; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
BRAGG CURVE
HEAVY IONS
HYDROGEN
MESONS
NOVAE
OXYGEN IONS
PRODUCTION
REACTION KINETICS
RESONANCE
STOPPING POWER
novae HRIBF