Speaker
David Jenkins Jenkins
(University of York)
Description
The 18Ne(a,p) reaction is seen to be one of the key reactions determining the break-out from the hot-CNO cycle. There are wide discrepancies between measured cross-sections for this reaction, which may reflect the difficulty in such direct radioactive beam measurements. Moreover, the cross-sections in the literature are inconsistent with measurements of the time-reversed 21Na(p,a) reaction.
Elastic and inelastic proton scattering of 21Na has been studied in inverse kinematics using a 21Na beam from the ISAC-2 facility at TRIUMF. Scattered protons were detected in annular silicon detectors and the TIGRESS gamma-ray array was operated in coincidence which allowed the inelastic channel to be cleanly discriminated. Several near-threshold resonances were observed and their properties deduced. These will be compared with previous measurements of excited states in 22Mg in the relevant energy region as well as the results of sd shell model calculations. The perspectives for the 18Ne(a,p) reaction will be given.
Primary author
David Jenkins Jenkins
(University of York)
