Experimental Demonstration of a Tunable Energy-Selective Gamma-Ray Imaging System Based on Recoil Electrons. - Changqing Zhang 003; Liang Sheng; Zhaohui Song; Tianxing Da; Haoqing Li 003; Baojun Duan; Yang Li 268; Dongwei Hei; Qunshu Wang (Sensors, 2024)