Fig. 3: Temporal response of the VFG CsPbBr3 detectors.

a, b Time-dependent 137Cs gamma-ray spectra for Au cathode and EGI anode at a total bias of 1400 V from detector III. The collection time for each spectrum was 540 s. c, d Typical pulses from the Au cathode and EGI anode collected at the beginning c and in the final stable operation stage d from detector I, respectively. Both events were selected with similar interaction depth near the anode region. e, f Scatter plots of the amplifier amplitude and preamplifier amplitude of the Au cathode signals, corresponding to the beginning e and final stable operation stage f, respectively. A total voltage of 400 V was used here for the flat baseline in c–f.