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PreprintarXiv licencearXiv

Spectral Discrimination of Deposited Gamma-Ray Energies in a Simulated CeBr3 Scintillator

  • Andrey Elagin
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Abstract

We show that wavelength measurements of individual detected optical photons may provide additional information about gamma-ray energy deposited in a CeBr3 crystal when the detected-photon-count distributions overlap for nearby gamma-ray energies. Monoenergetic 662 and 629 keV gammas are used in a Geant4 simulation of a 25×25×20 mm3 CeBr3 crystal. Assuming a light yield of 6.0×104 photons/MeV, a wavelength-independent photon-detection efficiency of 30%, and a wavelength resolution of σλ=40 nm, we find that the fraction of photons reconstructed above 385 nm gives an event-level separation of ∼ 2 standard deviations between the 662 and 629 keV event populations selected within the same ∼ 1%-wide detected-photon-count interval. No timing or reconstructed interaction-position information is used. The result demonstrates, within the present simulation model, that event-dependent optical spectra can retain energy information beyond an undifferentiated photon count.

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Cite

BibTeXRIS
BibTeX
@misc{elagin2026spectral,
  title = {{Spectral Discrimination of Deposited Gamma-Ray Energies in a Simulated CeBr$_3$ Scintillator}},
  author = {Andrey Elagin},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.09640},
  eprint = {2609.09640},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.09640},
}
RIS
TY  - UNPB
TI  - Spectral Discrimination of Deposited Gamma-Ray Energies in a Simulated CeBr_3 Scintillator
AU  - Andrey Elagin
PY  - 2026
DA  - 2026/09/09
PB  - arXiv
DO  - 10.48550/arxiv.2609.09640
UR  - https://arxiv.org/abs/2609.09640
AB  - We show that wavelength measurements of individual detected optical photons may provide additional information about gamma-ray energy deposited in a CeBr_3 crystal when the detected-photon-count distributions overlap for nearby gamma-ray energies. Monoenergetic 662 and 629 keV gammas are used in a Geant4 simulation of a 25×25×20 mm^3 CeBr_3 crystal. Assuming a light yield of 6.0×10^4 photons/MeV, a wavelength-independent photon-detection efficiency of 30%, and a wavelength resolution of σ_λ=40 nm, we find that the fraction of photons reconstructed above 385 nm gives an event-level separation of ∼ 2 standard deviations between the 662 and 629 keV event populations selected within the same ∼ 1%-wide detected-photon-count interval. No timing or reconstructed interaction-position information is used. The result demonstrates, within the present simulation model, that event-dependent optical spectra can retain energy information beyond an undifferentiated photon count.
ER  -