Tunable Light Scattering in Cast Organic Scintillators via BaSO$_4$ Nanoparticle Doping: A Short Summary

H. G. Zaunick; R. Bergert; K. T. Brinkmann; V. Dormenev; K. Eichhorn; J. M. Friedrich; S. Glennemeier-Marke; D. Kazlou; H. Lacker; M. J. Losekamm; C. Scharf; I. M. Wöstheinrich

arXiv · 2607.02538

Tunable Light Scattering in Cast Organic Scintillators via BaSO$_4$ Nanoparticle Doping: A Short Summary

H. G. Zaunick·R. Bergert·K. T. Brinkmann·V. Dormenev·K. Eichhorn·J. M. Friedrich·S. Glennemeier-Marke·D. Kazlou·H. Lacker·M. J. Losekamm·C. Scharf·I. M. Wöstheinrich

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Abstract

We summarize the fabrication and optical characterization of small-format (2 x 2 x 2 cm$^3$) cast organic scintillators based on Eljen EJ-290 resin, doped with barium sulfate (BaSO$_4$) powder at mass fractions from 0 % to 5 %. The goal is to tune the scattering length of the scintillator largely independently of its absorption and light output, so that scintillation light is localized on a controllable spatial scale matched to the fiber pitch of wavelength-shifting (WLS) fiber read-out. The scattering length is found to decrease from 6.05(8) cm at 1 % to 0.83(1) cm at 5 %, while the absolute light yield falls by only about 15 %. These results are a first proof of concept that the photon-transport scale in cast scintillators can be engineered on purpose, enabling position-sensitive scintillator tiles for fiber-readout sampling calorimeters and large-area muon trackers. Full details are given in the accompanying paper.

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H. G. Zaunick, R. Bergert, K. T. Brinkmann, V. Dormenev, K. Eichhorn, J. M. Friedrich, S. Glennemeier-Marke, D. Kazlou, H. Lacker, M. J. Losekamm, C. Scharf, I. M. Wöstheinrich. 2026-06-22. Tunable Light Scattering in Cast Organic Scintillators via BaSO$_4$ Nanoparticle Doping: A Short Summary. https://arxiv.org/abs/2607.02538

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