First direct measurement of the ¹⁷f(p,γ)¹⁸ne cross section

K. A. Chipps, Colorado School of Mines
D. W. Bardayan, Oak Ridge National Laboratory
J. C. Blackmon, Louisiana State University
K. Y. Chae, The University of Tennessee, Knoxville
U. Greife, Colorado School of Mines
R. Hatarik, Rutgers University–New Brunswick
R. L. Kozub, Tennessee Technological University
C. Matei, Oak Ridge Associated Universities
B. H. Moazen, The University of Tennessee, Knoxville
C. D. Nesaraja, Oak Ridge National Laboratory
S. D. Pain, Oak Ridge National Laboratory
W. A. Peters, Rutgers University–New Brunswick
S. T. Pittman, The University of Tennessee, Knoxville
J. F. Shriner, Tennessee Technological University
M. S. Smith, Oak Ridge National Laboratory

Abstract

The rate of the 17F(p,γ) 18Ne reaction is of significant importance in astrophysical events like novae and x-ray bursts. A 3+ state in 18Ne predicted to dominate the rate was found at 599.8 keV using the 17F(p,p)17F reaction [1], but the resonance strength was nknown. For the first time, the F1718Ne reaction has been measured directly with the Daresbury Recoil Separator, using a mixed beam of radioactive 17F and stable 17O from the HRIBF at ORNL. A γ width was found for the 599.8 keV resonance in 18Ne, and an upper limit on the direct capture S factor was determined at an intermediate energy of 800 keV. © 2009 American Institute of Physics.