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Description
This work presents the methodology and results of calibrating an organic liquid scintillator (EJ-315) [1] for gamma-ray spectroscopy using standard gamma sources, followed by spectral unfolding using a pre-determined detector response matrix using GEANT4 [2]. Energy calibration was performed via identification of known gamma peaks, and their Compton edge positions from Ba-133, Co-60, Na-22, and Cs-137 sources. Mathematical modelling of the detector’s linear light yield response was implemented. The calibrated spectra were unfolded using the GRAVEL [3] iterative technique to reconstruct the incident photon energy distribution.
References:
[1] C. C. Lawrence, A. Enqvist, M. Flaska, S. A. Pozzi, A. M. Howard, J. J. Kolata and F. D. Becchetti, Response characterization for an EJ315 deuterated organic-liquid scintillation detector for neutron spectroscopy, Nucl Instrum Methods Phys Res A 727, Elsevier, (2013) 21.
[2] J. Allison, K. Amako, J. Apostolakis, H. Araujo, P. A. Dubois, M. Asai, G. Barrand, R. Capra, S. Chauvie, et al., Geant4 developments and applications, IEEE Trans Nucl Sci 53, (2006) 270.
[3] H. Dombrowski 2023 JINST 18 P07005, doi:10.1088/1748-0221/18/07/P07005
