Speaker
Tohru Motobayashi
(RIKEN Nishina Center for Accelerator-Based Science)
Description
Intermediate-energy Coulomb dissociation using fast radioactive-isotope
(RI) beams has been employed to study astrophysical (p,gamma) reactions.
This method has an advantage of large cross sections and high experimental
efficiency.
Several experiments have been performed so far at fragmentation-based RI-beam
facilities like, GSI, MSU and RIKEN.
The most studied case is for the 7Be(p,gamma)8B reaction, which is important in
estimating high-energy neutrino flux from the sun.
Coulomb dissociation experiments provide an opportunity to determine the cross
section independent to direct capture measurements. To extract accurate results,
possible contributions of nuclear breakup, higher order process, possible mixture
of different multiplicity contribution mixed into the dominant E1 contribution are
being investigated both experimentally and theoretically.
Author
Tohru Motobayashi
(RIKEN Nishina Center for Accelerator-Based Science)
