Iodide Nanocrystal Scintillator Simulator (2D)

Material

Parameters

Photon energy Eγ 60 keV

Activator quality η_bulk 35%

Nanocrystal size D 10 nm

Live Readouts

Scintillation photons

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Light yield

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Energy resolution (FWHM)

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How it works (2D model)

This 2D companion uses the exact same scintillation model as the 3D version, viewed as a top-down cross-section of the lattice instead of a 3D block. A gamma/X-ray photon of energy Eγ is photoelectrically absorbed, ejecting a photoelectron that ionizes the lattice into a cascade of electron-hole pairs. The mean energy per pair is an empirical multiple of the bandgap (Robbins' rule, β ≈ 2–3); each pair then migrates to an activator centre and recombines with probability η into a scintillation photon:

N_eh = Eγ / (β·Eg)
η_eff = η_bulk · D/(D + d_q)
N_ph = η_eff · N_eh
LY   = N_ph / Eγ    (photons/MeV)
R    = 235% / √N_ph (FWHM energy resolution)

Material — sets Eg and β; a narrower gap (perovskite) is cheaper per pair but its soft lattice loses more to phonons.
Photon energy Eγ — more deposited energy makes a bigger absolute photon burst and, since resolution scales as 1/√N, a sharper energy resolution.
Activator quality η_bulk — the bulk-crystal radiative recombination fraction.
Nanocrystal size D — the nanoscale effect: a smaller crystal has more surface relative to its volume, so surface trap states quench a larger share of the light (quenching length d_q ≈ 2.5 nm) even at fixed η_bulk.

Drag to pan the lattice cross-section and scroll/pinch to zoom. Every photon event follows the identical N_eh → η_eff → N_ph → LY, R pipeline as the 3D simulator — only the rendering geometry differs.

Material: CsI

drag to pan · scroll to zoom