Investigation of the²³Na(p, γ)²⁴Mg and ²³Na(p, α)²⁰Ne reactions via (³He,d) spectroscopy

S. E. Hale, The University of North Carolina at Chapel Hill
A. E. Champagne, The University of North Carolina at Chapel Hill
C. Iliadis, The University of North Carolina at Chapel Hill
V. Y. Hansper, The University of North Carolina at Chapel Hill
D. C. Powell, The University of North Carolina at Chapel Hill
J. C. Blackmon, ORNL Physics Division

Abstract

States near the 23Na+p threshold in 24Mg were investigated using the 23Na(3He,d)24Mg reaction over the angular range of 5° ≤ θlab ≤ 35° at E(3He)=20 MeV. Spectroscopic factors were extracted for states corresponding to resonances in the 23Na(p, γ) 24Mg and 23Na(p, α)20Ne reactions. We find that one state, corresponding to a previously unobserved resonance at Ec.m.= 138 keV, may make a significant contribution to the rates of both reactions at low temperatures. Another state, corresponding to a possible resonance at Ec.m.=37 keV may make a small contribution to the 23Na(p, α)20Ne reaction. New rates for the 23Na(p, γ)24Mg and 23Na(p, α) 20Ne reactions are presented and the astrophysical implications are discussed.