Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2006-09-26
Phys.Atom.Nucl.69:1979-1984,2006
Physics
Nuclear Physics
Nuclear Experiment
13 pages, 5 figures
Scientific paper
10.1134/S1063778806120015
The structure of the unbound proton-rich isotope 19Na was studied in resonance elastic scattering of a radioactive 18Ne beam on a proton target using the thick-target inverse-kinematics method. The experiment covered excitation energy range from 0.5 to 2.7 MeV in c.m.s. Only one state of 19Na (the second excited state) was observed. A combined R-matrix and potential-model analysis was performed. The spin and parity assignment of this second excited state was confirmed to be 1/2+. We showthat the position of the 1/2+ state significantly affects the reaction rate through that state but the total reaction rate remains unchanged since the 18Ne(2p,gamma) proceeds mostly via the ground and first excited states in 19Na at stellar temperatures.
Aprahamian Ani
Boutachkov Plamen
Kolata James J.
Lamm L. O.
Quinn M.
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