Kinetic Monte Carlo simulations of scintillation processes in NaI(Tl)

Journal Article · Sat Apr 26 00:00:00 EDT 2014 · IEEE Transactions on Nuclear Science, 61(2):860-869

DOI:https://doi.org/10.1109/TNS.2014.2300142· OSTI ID:1132205

Kerisit, Sebastien N.; Wang, Zhiguo; Williams, Richard; Grim, Joel; Gao, Fei

Developing a comprehensive understanding of the processes that govern the scintillation behavior of inorganic scintillators provides a pathway to optimize current scintillators and allows for the science-driven search for new scintillator materials. Recent experimental data on the excitation density dependence of the light yield of inorganic scintillators presents an opportunity to incorporate parameterized interactions between excitations in scintillation models and thus enable more realistic simulations of the nonproportionality of inorganic scintillators. Therefore, a kinetic Monte Carlo (KMC) model of elementary scintillation processes in NaI(Tl) is developed in this work to simulate the kinetics of scintillation for a range of temperatures and Tl concentrations as well as the scintillation efficiency as a function of excitation density. The ability of the KMC model to reproduce available experimental data allows for elucidating the elementary processes that give rise to the kinetics and efficiency of scintillation observed experimentally for a range of conditions.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1132205
• Report Number(s): PNNL-SA-94083; NN2001000
• Journal Information: IEEE Transactions on Nuclear Science, 61(2):860-869, Journal Name: IEEE Transactions on Nuclear Science, 61(2):860-869
• Country of Publication: United States
• Language: English