Determination of S₁₇ from systematic analyses on ⁸B Coulomb breakup with the Eikonal-CDCC method

الأصل · EN

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 ⁵⁸Ni(⁸B,⁷Be+p)⁵⁸Ni at 240 MeV, which shows its applicability to systematic analysis of ⁸B dissociation to extract the astrophysical factor S₁₇ with high accuracy.