Effect of irradiation on photoluminescence and optical absorption spectra of Li2B4O7:Mn and Li2B4O7:Ag single crystals |
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| Affiliation: | 1. Institute of Isotopes HAS, P.O. Box 77, Budapest 1525, Hungary;2. Institute of Surface Chemistry, NASU, 17 Gen. Naumov str., Kyiv 03164, Ukraine;3. Institute of Electron Physics, NASU, 21 University str., Uzhgorod 88000, Ukraine;4. Photoscience Laboratory, BUTE and CRC HAS, P.O. Box 17, Budapest 1525, Hungary;1. Hungarian Academy of Sciences, Institute of Isotopes, Budapest, Hungary;2. Hungarian Academy of Sciences, Institute of Isotopes, Budapest, Hungary;1. Institute of Physics, Kazimierz Wielki University in Bydgoszcz, 85-090 Bydgoszcz, Poland;2. Department of Electronics, Ivan Franko National University of Lviv, Powstancow Wielkopolskich, 2, 79017 Lviv, Ukraine;3. Institute of Physics, AS CR, 162 53 Prague, Czech Republic;1. Departamento de Física, Universidade Federal de Sergipe, São Cristóvão, SE, Brazil;2. Instituto de Pesquisas Energéticas e Nucleares/Comissão Nacional de Energia Nuclear, São Paulo, Brazil;1. Department of Engineering Physics, Air Force Institute of Technology, Wright-Patterson Air Force Base, OH 45433, USA;2. Vlokh Institute of Physical Optics, Dragomanov 23, L’viv 79005, Ukraine;3. Department of Physics and Astronomy, West Virginia University, Morgantown, WV 26506, USA;1. Aristotle University of Thessaloniki, Nuclear Physics Laboratory, 54124 Thessaloniki, Greece;2. Institute of Nuclear Sciences, Ankara University, Beşevler 06100, Ankara, Turkey;3. McDaniel College, Physics Department, Westminster, MD 21157, USA;1. School of Physics, Bharathidasan University, Tiruchirappalli 620024, Tamil Nadu, India;2. Department of Physics, National Institute of Technology, Tiruchirappalli 620015, India |
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| Abstract: | Effects induced by high-dose irradiation on manganese- and silver-doped Li2B4O7 (lithium tetraborate, LTB) single crystals were monitored by photoluminescence and optical absorption spectroscopy. High-dose (1.0×103 and 1.2×104 Gy) irradiation of the samples was performed using high-energy, short-time (4 MeV, 2.6 μs) electron pulses of a linear electron accelerator. Changes in the oxidation states of dopants were revealed. Recharging of manganese Mn2+→Mn3+ and Ag+→Ag0 were observed. Ionization process Mn2+→Mn3++e− and creation of Ag0-nanoparticles are supposed. |
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