Eur. Phys. J. A (2005) 25: 643-644
https://doi.org/10.1140/epjad/i2005-06-007-3

ENAM 2004

New ¹⁹Ne resonance observed using an exotic ¹⁸F beam

¹ Physics Division, Oak Ridge National Laboratory, 37831, Oak Ridge, TN, USA
² Physics Department, Tennessee Technological University, 38505, Cookeville, TN, USA
³ Department of Physics and Astronomy, University of Tennessee, 37996, Knoxville, TN, USA
⁴ Department of Physics and Astronomy, University of North Carolina, 37599, Chapel Hill, NC, USA
⁵ Department of Physics, Dumlupinar University, 43100, Kutahya, Turkey

^* e-mail: bardayan@mail.phy.ornl.gov

Received: 22 November 2004
Accepted: 18 February 2005
Published online: 13 April 2005

Abstract

The rates of the ¹⁸F(p,α) ¹⁵O and ¹⁸F(p,γ) ¹⁹Ne reactions in astrophysical environments depend on the properties of ¹⁹Ne levels above the ¹⁸F + p threshold. There are at least 8 levels in the mirror nucleus ¹⁹F for which analogs have not been observed in ¹⁹Ne in the excitation energy range E _x = 6.4-7.6MeV. We have made a search for these levels by measuring the ¹H( ¹⁸F, p) ¹⁸F excitation function over the energy range E _c.m. = 0.3-1.3MeV. We have identified and measured the properties of a newly observed level at E _x = 7.420±0.014MeV, which is most likely the mirror to the J ^π = 7/2^{+ 19}F level at 7.56MeV. This new level is found to increase the calculated ¹⁸F(p,α) ¹⁵O reaction rate by 16%, 63%, and 106% at T = 1, 2, and 3GK, respectively.