David Jenkins Jenkins
(University of York)
26/03/2012, 14:10
Talk
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)...
Christian Diget
(University of York)
26/03/2012, 14:35
Talk
We here present some of the first direct-reaction data with radioactive ion beams utilising the TIGRESS and SHARC particle-gamma detector systems. In the experiment, transfer reactions in inverse kinematics were used as indirect probes of the 18Ne(alpha,p)21Na and 23Mg(p,gamma)24Al reactions. The SHARC array (Silicon Highly-segmented Array for Reactions and Coulex) is a new multi-purpose...
Brian Roeder
(Texas A&M University)
26/03/2012, 15:00
Talk
The detection of gamma rays from the decay of the 26Al ground state in the galaxy gives evidence that nucleosynthesis is occurring in present-day stars, but its origin is not yet clear. This implies that reactions involving 26Al are important for astrophysical processes.
In a recent experiment at Texas A&M University, reactions with the ground state and isomeric state of 26Al were...
Masaki Sasano
(RIKEN Nishina Center for Accelerator-Based Science)
26/03/2012, 15:25
Talk
Electron-capture (EC) and beta-decay play important roles in type-II and typeIa supernovae. They occur through the Gamow-Teller (GT) and Fermi transitions in nuclei, which are extensively studied to reliably estimate the weak-interactions rates. Experimentally, a powerful probe to study GT transitions has been provided by the charge-exchange reactions at intermediate energies such as the...
