Constraining the 6.05 MeV 0+ and 6.13 MeV 3- cascade transitions in the 12C(,)16O reaction using the asymptotic normalization coefficients. Academic Article uri icon

abstract

  • The 12C(,)^16O reaction plays a fundamental role in astrophysics and needs to be known with accuracy better than 10%. Cascade transitions through the excited states of 16 O are contributing to the uncertainty. We constrained the contribution of the 0+ (6.05 MeV) and 3- (6.13 MeV) cascade transitions by measuring the asymptotic normalization coefficients for these states using the -transfer reaction 6 Li(12C,d)^16O at sub-Coulomb energy. The contribution of the 0+ and 3- cascade transitions at 300 keV is found to be 1.96 0.3 and 0.12 0.04 keVb for destructive interference of the direct and resonance capture and 4.36 0.45 and 1.44 0.12 keVb for constructive interference, respectively. The combined contribution of the 0+ and 3- cascade transitions to the 12C(,)16O reaction cross section at 300 keV does not exceed 4%. Significant uncertainties have been dramatically reduced.

published proceedings

  • Phys Rev Lett

author list (cited authors)

  • Avila, M. L., Rogachev, G. V., Koshchiy, E., Baby, L. T., Belarge, J., Kemper, K. W., ... Uberseder, E.

publication date

  • January 1, 2015 11:11 AM