Spectroscopic structure of exotic 19Na. Astrophysics implication
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The structure of proton-rich isotope 19Na was studied in resonance elastic scattering of a radioactive 18Ne beam on a proton target using inverse-kinematics method. Only one state of 19Na (the second excited state) was observed. A combined R-matrix and potential model analysis was performed. The spin-parity assignment of the second excited state was confirmed to be 1/2 +. We show that the position of the 1/2 + state significantly affects the astrophysicaly important 18Ne(2p,γ) reaction rate through that state but the totalreaction rate remains unchanged 2p-capture on 18Ne proceeds mostly via the ground and first excited states in 19Na at stellar temperatures. © 2006 American Institute of Physics.
author list (cited authors)
Skorodumov, B. B., Rogachev, G. V., Boutachkov, P., Aprahamian, A., Kolata, J. J., Lamm, L. O., Quinn, M., & Woehr, A.