Properties of nuclear and Coulomb breakup of 8B

TL;DR

This study investigates how the breakup cross sections of 8B depend on target mass at 65 MeV/nucleon using CDCC, revealing specific scaling laws and interference behaviors.

Contribution

It provides a detailed analysis of nuclear and Coulomb breakup mechanisms of 8B, including the validity of scaling laws and interference effects, with improved modeling techniques.

Findings

A_T^(1/3) scaling law holds only for 40 < A_T < 150.

Interference between nuclear and Coulomb breakup vanishes at very forward angles.

Truncating the p-7Be energy slightly reduces nuclear breakup at forward angles.

Abstract

The dependence of breakup cross sections of 8B at 65 MeV/nucleon on the target mass number A_T is investigated by means of the continuum-discretized coupled-channels method (CDCC) with more reliable distorting potentials than those in the preceding study. The A_T^(1/3) scaling law of the nuclear breakup cross section is found to be satisfied only in the middle A_T region of 40 < A_T < 150. The interference between nuclear and Coulomb breakup amplitudes vanishes in very forward angle scattering, independently of the target nucleus. The truncation of the relative energy between the p and 7Be fragments slightly reduces the contribution of nuclear breakup at very forward angles, while the angular region in which the first-order perturbation theory works well does not change essentially.