April 2009

Conference Paper

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

By:
Chipps, K.; Bardayan, Daniel W; Blackmon Jr, Jeffery ; Chae, K. Y.; Greife, U.; Hatarik, Robert; Kozub, R.; Matei, Catalin; Moazen, Brian; Nesaraja, Caroline D; Pain, Steven D; Peters, W. A.; Pittman, S. T.; Shriner, J.; Smith, Michael S
Journal Name:
PoS - Proceedings of Science
Page Number:
14
Volume:
059
Issue Number:
NIC-X
Publication Date:
April 29, 2009
Conference Name:
10th Symposium on Nuclei in the Cosmos
Conference Location:
Mackinac Island, Michigan, United States of America

Abstract

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.

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