In-ring nuclear reaction induced by light-ions at HIRFL-CSR*

Abstract In-ring nuclear reactions induced by light-ions, which are characterized by low-momentum sensitivity and low background, play an important role in nuclear structure and astrophysics investigations. Recently, the in-ring proton-nucleus elastic scattering measurements at low momentum transfer based on the internal hydrogen-gas-jet target have been successfully performed at the Cooler Storage Ring of the Heavy Ion Research Facility in Lanzhou (HIRFL-CSR). In this proceeding, we present the progress of matter radius measurements using the small-angle differential cross sections of proton-nucleus elastic scattering at HIRFL-CSR.