The 17F(p, γ)18Ne direct capture cross section

J. C. Blackmon, ORNL Physics Division
D. W. Bardayan, ORNL Physics Division
C. R. Brune, Ohio University
F. Carstoiu, Institute of Atomic Physics, Bucharest
A. E. Champagne, The University of North Carolina at Chapel Hill
R. Crespo, Instituto Superior Técnico
T. Davinson, The University of Edinburgh
J. C. Fernandes, Instituto Superior Técnico
C. A. Gagliardi, Cyclotron Institute
U. Greife, Colorado School of Mines
C. J. Gross, ORNL Physics Division
P. A. Hausladen, ORNL Physics Division
C. Iliadis, The University of North Carolina at Chapel Hill
C. C. Jewett, Colorado School of Mines
R. L. Kozub, Tennessee Technological University
T. A. Lewis, ORNL Physics Division
F. Liang, ORNL Physics Division
B. H. Moazen, Tennessee Technological University
A. M. Mukhamedzhanov, Cyclotron Institute
C. D. Nesaraja, Tennessee Technological University
F. M. Nunes, Michigan State University
P. D. Parker, Yale University
D. C. Radford, ORNL Physics Division
L. Sahin, ORNL Physics Division
J. P. Scott, Tennessee Technological University
D. Shapira, ORNL Physics Division
M. S. Smith, ORNL Physics Division
J. S. Thomas, Rutgers University–New Brunswick
L. Trache, Cyclotron Institute
R. E. Tribble, Cyclotron Institute
P. J. Woods, The University of Edinburgh
C. H. Yu, ORNL Physics Division


The 17F(p,γ)18Ne reaction is important for understanding nucleosynthesis in novae. This reaction rate is expected to be dominated by the unmeasured direct-capture cross section at nova temperatures. We have measured cross sections for the proton-transfer reaction 14N(17F,18Ne)13C to determine 17F+p asymptotic normalization coefficients for 18Ne bound states and the 17F(p, γ)18Ne direct-capture cross section. Elastic scattering cross sections for the 14N(17F,17F) 14N and 12C(17F,17F) 12C reactions were also measured and used to determine reliable optical-model parameters within the framework of a microscopic double-folding model. Here we present the technique and some preliminary results. © 2004 Elsevier B.V. All rights reserved.