Quenching of neutron spectroscopic factors of radioactive carbon isotopes with knockout reactions within a wide energy range

The quenching factors of one-neutron spectroscopic factors, which are ratios of theoretical to experimental one-neutron removal cross sections, are studied for the carbon isotopes ^15-19C, with ¹²C and ⁹Be targets within incident energies from around 50 to 900 MeV/nucleon. The resulting values of quenching factors do not show strong energy dependence within such an energy range. The average values of the these quenching factors agree well with the systematics in [J.A. Tostevin and A. Gade, Phys. Rev. C, 90 057602 (2014)], which was established for a large set of radioactive nuclei with different masses below 305 MeV/nucleon.