The "missing" 3+ state of Ne18 and explosive F17(p, γ) burning

A. García, E. G. Adelberger, P. V. Magnus, D. M. Markoff, K. B. Swartz, M. S. Smith, K. I. Hahn, N. Bateman, and P. D. Parker
Phys. Rev. C 43, 2012 – Published 1 April 1991
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Abstract

Wiescher, Görres, and Thielemann suggested that a "missing" Jπ=3+ level in Ne18 should occur at Ex4.33 MeV, only ≈410 keV above the F17+p threshold. They noted that this level would provide an s-wave resonance in the F17(p, γ) reaction, greatly increasing its thermonuclear reaction rate. This, in turn, would have a pronounced effect on the production of O17 and O18 in explosive stellar environments. We have searched for this level using the O16(He3, n) reaction. High-resolution time-of-flight spectra show that the 3+ level occurs at Ex=4.561±0.009 MeV, ≈230 keV higher than suggested. The astrophysical consequences of this result are discussed.

  • Received 17 October 1990

DOI:https://doi.org/10.1103/PhysRevC.43.2012

©1991 American Physical Society

Authors & Affiliations

A. García, E. G. Adelberger, P. V. Magnus, D. M. Markoff, and K. B. Swartz

  • Nuclear Physics Laboratory GL-10, University of Washington, Seattle, Washington 98195

M. S. Smith*, K. I. Hahn, N. Bateman, and P. D. Parker

  • Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06511

  • *Present address: W. K. Kellogg Radiation Laboratory, Caltech, Pasadena, CA 91125.

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Vol. 43, Iss. 4 — April 1991

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