Luminescent properties of composite scintillators based on PPO and o-POPOP doped SiO₂ xerogel matrices

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• 作者：O. Viagin^a ; ^{viagin@isma.kharkov.ua" class="auth_mail" title="E-mail the corresponding author} ; A. Masalov^a ; I. Bespalova^a ; O. Zelenskaya^a ; V. Tarasov^a ; V. Seminko^a ; L. Voloshina^a ; Yu. Zorenko^b ; Yu. Malyukin^a
• 关键词：SiO2 ; Composite scintillator ; Sol&ndash ; gel method ; Luminescence ; Synchrotron radiation excitation
• 刊名：Journal of Luminescence
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：179
• 期：Complete
• 页码：178-182
• 全文大小：1261 K

文摘

New composite scintillation detectors were obtained by incorporation of PPO and o-POPOP organic scintillators into porous sol–gel silica matrices. Composites possess high photoluminescence intensity and decay time in nanosecond range. The absolute light yield of composite scintillators at excitation by alpha-radiation is about 4000–5000 photons/MeV and the pulse–height resolution is about 30%. The investigations of time-resolved luminescence of composites performed under excitation by synchrotron radiation in the 3.7–25 eV range have shown that the non-radiative energy transfer between host matrix and dopant molecules occurs via singlet states of SiO₂ oxygen-deficient centers.