Toward a user's toolkit for modeling scintillator non-proportionality and light yield

Li, Qi; Lu, X. L.; Williams, Richard

doi:10.1117/12.2063468

Cited by 4 publications

(2 citation statements)

References 26 publications

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“…Comparing with the coefficients fitted to experimental data, we note that our calculated rate is several orders of magnitudes smaller than the value of 1.07 Â 10 À20 cm 6 s À1 obtained by Bizarri et al 8 We note however that recently more improved sets of rate equations and boundary conditions have been developed. 16,17,31 Comparing to more recent results from fits (C ¼ 3.2 Â 10 À29 cm 6 s À1 ) to z-scan experiments, our calculated values are off by a few decades. 16,17 This illustrates the difficulty in fitting a rate equation model to a very complex set of events and interdependent mechanisms.…”

Section: Fig 3 Calculated Values For the Direct E-e-h Auger Recombisupporting

confidence: 70%

Auger recombination in sodium-iodide scintillators from first principles

McAllister

Åberg

Schleife

et al. 2015

Applied Physics Letters

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Scintillator radiation detectors suffer from low energy resolution that has been attributed to nonlinear light yield response to the energy of the incident gamma rays. Auger recombination is a key non-radiative recombination channel that scales with the third power of the excitation density and may play a role in the non-proportionality problem of scintillators. In this work, we study direct and phonon-assisted Auger recombination in NaI using first-principles calculations. Our results show that phonon-assisted Auger recombination, mediated primarily by short-range phonon scattering, dominates at room temperature. We discuss our findings in light of the much larger values obtained by numerical fits to z-scan experiments. V

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Section: Fig 3 Calculated Values For the Direct E-e-h Auger Recombisupporting

confidence: 70%

Auger recombination in sodium-iodide scintillators from first principles

McAllister

Åberg

Schleife

et al. 2015

Applied Physics Letters

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“…In general, effective mass approximation results in overestimation of the thermalization length in most crystals since group velocities and mobilities of hot carriers are overestimated. A set of papers are devoted to the description of the next stage, namely, the interaction and the recombination of charge carriers, which are described using either classical rate equations [185]- [187] or kinetic Monte Carlo calculations [188], [189]. This approach to thermalization stage makes a further step toward developing a toolkit to estimate scintillators properties [186].…”

Section: Theory and Modelingmentioning

confidence: 99%

Needs, Trends, and Advances in Inorganic Scintillators

Dujardin

Auffray

Bourret-Courchesne

et al. 2018

IEEE Trans. Nucl. Sci.

353

240

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This paper presents new developments in inorganic scintillators widely used for radiation detection. It addresses major emerging research topics outlining current needs for applications and material sciences issues with the overall aim to provide an up-to-date picture of the field. While the traditional forms of scintillators have been crystals and ceramics, new research on films, nanoparticles, and microstructured materials is discussed as these material forms can bring new functionality and therefore find applications in radiation detection. The last part of the contribution reports on the very recent evolutions of the most advanced theories, methods, and analyses to describe the scintillation mechanisms.

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