Investigation of the ^30S(p,γ)^31Cl reaction via Coulomb dissociation

Details Investigation of the ^30S(p,γ)^31Cl reaction via Coulomb dissociation Investigation of the ^30S(p,γ)^31Cl reaction via Coulomb dissociation

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aps..haw.bg010t&link_type=abstract

American Physical Society, 3rd Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan, October 1

Physics

Nuclear Physics

Scientific paper

The Stellar reaction ^30S(p,γ)^31Cl was studied via Coulomb dissociation. The nucleus ^30S is a candidate for the waiting point, which the reaction flow temporary stops at this nuclei, in the rapid proton capture (rp) process. The ^30S(p,γ)^31Cl reaction decreases the amount of ^30S, and thus speeds the reaction flow of the rp process up. Therefore the strength of this reaction affects the resultant abundance and energy production in the rp process. No direct measurement of the ^30S(p,γ)^31Cl reaction has been made so far. The aim of the present work is to determine the resonant capture reaction rate of ^30S(p,γ)^31Cl from the result of Coulomb dissociation of ^31Cl. The experiment was performed at the RIKEN Nishina Center. The secondary beam of ^31Cl at 58 MeV/nucleon was produced and separated using the RIKEN Projectile Fragment Separator (RIPS). The beam of ^31Cl bombarded a ^208Pb target. The momentum vectors of the breakup products, the isotopes ^30S and protons, were determined using the detectors located at downstream of the target. The relative energy spectrum of ^30S + p system was extracted using invariant-mass method. In this presentation, we discuss the unbound state of ^31Cl which is relevant to the resonant capture in the ^30S(p,γ)^31Cl reaction.

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