Multiple dye interactions in plastic scintillators: Effects on pulse shape discrimination
Abstract
The scintillation process in plastic scintillators has been studied with mixed systems containing high concentrations of multiple fluorescence dyes. It has been shown that the triplet–triplet interaction phenomena leading to the production of delayed light and pulse shape discrimination (PSD) can vary depending on the triplet energies of the interacting dyes. At small differences between the first excited triplet state energies, found to be below 0.1 eV, a pair of interacting dyes of different molecular species can be involved in heterogeneous excitation migration and triplet–triplet annihilation that result in the enhancement of delayed light and PSD, due to the engagement of both dyes in the process. At differences above 0.27 eV, excitation trapping on the lower energy triplet molecules leads to conditions when triplet–triplet migration and annihilation can proceed only homogeneously between molecules of the same species. The results explain the different effects produced by the selection of fluorescent dyes in previously reported PSD systems containing one primary and one secondary dyes. They also demonstrate a non-traditional approach to the design of new plastic scintillators with multiple dyes that, at improved scintillation and PSD performance, may simplify the production process.
- Authors:
-
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Carnegie Mellon Univ., Pittsburgh, PA (United States)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1651186
- Alternate Identifier(s):
- OSTI ID: 1643971
- Report Number(s):
- LLNL-JRNL-807940
Journal ID: ISSN 0168-9002; 1013707
- Grant/Contract Number:
- AC52-07NA27344
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
- Additional Journal Information:
- Journal Volume: 978; Journal Issue: na; Journal ID: ISSN 0168-9002
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Zaitseva, N. P., Glenn, A. M., Carman, M. L., Mabe, A. N., Payne, S. A., Marom, N., and Wang, X. Multiple dye interactions in plastic scintillators: Effects on pulse shape discrimination. United States: N. p., 2020.
Web. doi:10.1016/j.nima.2020.164455.
Zaitseva, N. P., Glenn, A. M., Carman, M. L., Mabe, A. N., Payne, S. A., Marom, N., & Wang, X. Multiple dye interactions in plastic scintillators: Effects on pulse shape discrimination. United States. https://doi.org/10.1016/j.nima.2020.164455
Zaitseva, N. P., Glenn, A. M., Carman, M. L., Mabe, A. N., Payne, S. A., Marom, N., and Wang, X. Wed .
"Multiple dye interactions in plastic scintillators: Effects on pulse shape discrimination". United States. https://doi.org/10.1016/j.nima.2020.164455. https://www.osti.gov/servlets/purl/1651186.
@article{osti_1651186,
title = {Multiple dye interactions in plastic scintillators: Effects on pulse shape discrimination},
author = {Zaitseva, N. P. and Glenn, A. M. and Carman, M. L. and Mabe, A. N. and Payne, S. A. and Marom, N. and Wang, X.},
abstractNote = {The scintillation process in plastic scintillators has been studied with mixed systems containing high concentrations of multiple fluorescence dyes. It has been shown that the triplet–triplet interaction phenomena leading to the production of delayed light and pulse shape discrimination (PSD) can vary depending on the triplet energies of the interacting dyes. At small differences between the first excited triplet state energies, found to be below 0.1 eV, a pair of interacting dyes of different molecular species can be involved in heterogeneous excitation migration and triplet–triplet annihilation that result in the enhancement of delayed light and PSD, due to the engagement of both dyes in the process. At differences above 0.27 eV, excitation trapping on the lower energy triplet molecules leads to conditions when triplet–triplet migration and annihilation can proceed only homogeneously between molecules of the same species. The results explain the different effects produced by the selection of fluorescent dyes in previously reported PSD systems containing one primary and one secondary dyes. They also demonstrate a non-traditional approach to the design of new plastic scintillators with multiple dyes that, at improved scintillation and PSD performance, may simplify the production process.},
doi = {10.1016/j.nima.2020.164455},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = na,
volume = 978,
place = {United States},
year = {Wed Jul 22 00:00:00 EDT 2020},
month = {Wed Jul 22 00:00:00 EDT 2020}
}
Search WorldCat to find libraries that may hold this journal