Determination of S 17 from systematic analyses on 8 B Coulomb breakup with the Eikonal-CDCC method
Kazuyuki Ogata, M. Yahiro, Y. Iseri, T. Matsumoto, N. Yamashita, M. Kamimura
Abstract
A new version of the method of Continuum-Discretized Coupled-Channels method (CDCC) is proposed, that is, the Eikonal-CDCC method (E-CDCC). The E-CDCC equation, for Coulomb dissociation in particular, can easily and safely be solved, since it is a first-order differential equation and contains no huge angular momentum in contrast to the CDCC one. The scattering amplitude calculated by E-CDCC has a similar form to that by CDCC. Then one can construct hybrid amplitude in an intuitive way, i.e., CDCC amplitude is adopted for a smaller angular momentum
L
and E-CDCC one for a larger
L
related to an impact parameter
b
. The hybrid calculation is found to perfectly reproduce the quantum mechanical result for
58
Ni(
8
B,
7
Be
+p
)
58
Ni at 240 MeV, which shows its applicability to systematic analysis of
8
B dissociation to extract the astrophysical factor
S
17
with high accuracy.