Abstract

A gas-filled recoil separator, SHANS2 (Spectrometer for Heavy Atoms and Nuclear Structure-2), with five magnets arranged in a Qv-D-Qh-Qv-D configuration is constructed at the China Accelerator Facility for Superheavy Elements (CAFE2) of the Institute of Modern Physics (IMP) in Lanzhou. It is dedicated to the study of the heavy nuclei produced in heavy-ion-induced fusion evaporation reactions, especially to the experiments on the superheavy elements with cross-sections lower than 1 pb. The maximum magnetic rigidity of the main dipole magnet is designed to be 2.5 T m. The detailed design of the SHANS2 and the results of several test experiments are presented.

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