Charge radii of 11−16C, 13−17N and 15−18O determined from their charge-changing cross-sections and the mirror-difference charge radii
J. Zhao, B. Sun, I. Tanihata, Jing Xu, Kaiyuan Zhang, A. Prochazka, Li Zhu, S. Terashima, Jie Meng, L. C. He, Chia‐Yu Liu, Guang-Shuai Li, C.G. Lu, W.J. Lin, Weiping Lin, Zhong Liu, Panpan Ren, Z. Sun, F. Wang, Jing Wang, M. Wang, S. T. Wang, Xiu-Lin Wei, X. Xu, Juchen Zhang, Mingxing Zhang, Xinhui Zhang
Abstract
Charge-changing cross-sections (CCCSs) of 11−16 C, 13−17 N and 15−18 O on a carbon target have been determined at energies around 300 MeV/nucleon. A nucleon separation energy-dependent correction factor has been introduced to the Glauber model calculation for extracting the nuclear charge radii from the experimental CCCSs. The charge radii of 11 C, 13,16 N and 15 O thus were determined for the first time. With the new radii, we studied the experimental mirror-difference charge radii ( Δ R ch mirror ) of 11 B- 11 C, 13 C- 13 N, 15 N- 15 O, 17 N- 17 Ne pairs for the first time. We find that the Δ R ch mirror values of 13 C- 13 N and 15 N- 15 O pairs follow well the empirical relation to the isospin asymmetry predicted by the ab i n i t i o calculations, while Δ R ch mirror of 11 B- 11 C and 17 N- 17 Ne pairs deviate from such relation by more than two standard deviations.