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The influence of neutrons on charge changing cross-sections ([Formula: see text]) in C isotopes on [Formula: see text]C and proton targets has been investigated in the framework of Glauber model. By comparing the theoretical results and experimental data, it is found out that the influence mainly comes from the projectile neutrons, and the [Formula: see text] has a slight change with the increase of the neutron number. Besides, the calculations also illustrate that the influence gets bigger with the reduction of the incident energy.

Charge-changing cross section ($\sigma_{\text{cc}}$) measurements via the transmission method have made important progress recently aiming to determine the charge radii of exotic nuclei. In this work, we report a new $\sigma_{\text{cc}}$ measurement of 299(9) MeV/nucleon $^{28}$Si on carbon at the second Radioactive Ion Beam Line in Lanzhou (RIBLL2) and describe the data analysis procedure in detail. This procedure is essential to evaluate the systematic uncertainty in the transmission method.
The determined $\sigma_{\mathrm{cc}}$ of 1125(11) mb is found to be consistent with the existing data at similar energies. The present work will serve as a reference in the $\sigma_{\text{cc}}$ determinations at RIBLL2.

Abstract:We have reanalyzed reaction cross sections of 16 N on 12 C target. The nucleon density distribution of 16 N, especially surface density distribution, was extracted using the modified Glauber model. On the basis of dilute surface densities, the discussion of 15 N(n, γ) 16 N reaction was performed within the framework of the direct capture reaction mechanism. The calculations agreed quite well with the experimental data.