First Direct Measurement of the ¹⁷F(p,gamma)¹⁸Ne Cross Section

Conference · Tue Jan 01 00:00:00 EST 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.102.152502· OSTI ID:951926

Chipps, K. ^[1]; Bardayan, Daniel W ^[2]; Blackmon, Jeff C ^[2]; Chae, K. Y. ^[3]; Greife, U. ^[1]; Hatarik, Robert ^[4]; Kozub, R. L. ^[5]; Matei, Catalin ^[6]; Moazen, Brian ^[3]; Nesaraja, Caroline D ^[2]; Pain, Steven D ^[2]; Peters, W. A. ^[4]; Pittman, S. T. ^[3]; Smith, Michael Scott ^[2]

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1. Colorado School of Mines, Golden
2. ORNL
3. University of Tennessee, Knoxville (UTK)
4. Rutgers University
5. Tennessee Technological University
6. Oak Ridge Associated Universities (ORAU)

The rate of the 17F(p,gamma)18Ne reaction is of significant importance in astrophysical events like novae and x-ray bursts. A previous 17F(p,p)17F measurement identified the 3+ state in 18Ne predicted to dominate the rate above 0.2 GK at a center of mass energy of 599.8 keV, but the resonance strength for proton capture was unknown. We have directly measured the 17F(p,gamma)18Ne reaction with the Daresbury Recoil Separator, using a mixed beam of radioactive 17F and stable 17O from the HRIBF at ORNL. The resonance strength for the 599.8 keV resonance in 18Ne was found to be = 33 14(stat) 17(sys) meV, corresponding to a width of = 56 24(stat) 30(sys) meV. Additionally, an upper limit on the direct capture S factor of S(E) < 65 keV b was determined at an intermediate energy of 800 keV.

• 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: 951926
• Journal Information: Physical Review Letters, Vol. 102, Issue 15; Conference: 10th Symposium on Nuclei in the Cosmos, Mackinac Island, MI, USA, 20080727, 20080801; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
A CENTERS
CROSS SECTIONS
NOVAE
ORNL
PROTONS
RESONANCE