Fig. 4: Gamma-ray excitation characterizations.
From: Lithium-doped two-dimensional perovskite scintillator for wide-range radiation detection

a Gamma-ray pulse-height spectra and b gamma-ray excited decay of 1:1 Li-(PEA)2PbBr4. Black line in (a) is the Gaussian fitting for extraction of light yield and energy resolution and in (b) is the three-component exponential decay fitting.