A. Alikhanyan National Science Laboratory (YerPhI), Yerevan, Armenia ; National Research University “High School of Economics”, (NRU HSE), Moscow, Russia ; Institute of Physics, University of Tartu, Riia 142, 51014 Tartu, Estonia
Absorption, emission and excitation spectra of 50 MeV electron beam irradiated and as-grown YAG single crystals were studied and compared in the 10-300 K temperature range using time-resolved luminescence spectroscopy under UV/VUV/XUV excitation by synchrotron radiation and cathodoluminescence. The emission spectra consist of intrinsic (excitonic) and defect related non-elementary bands in the VIS/UV range. It is shown that fast electrons create stable F and F+ color centers with characteristic emission and absorption bands in the visible/UV range. Induced absorption caused from these defects starts at 4.2 eV. Energy transfer from host to color centers is not efficient process.
|Investigation of Luminescence Processes in YAG Single Crystals Irradiated by 50 MEV Electron Beam||Jan 25, 2021|
A. Margaryan J. Annand R. Ajvazyan H. Elbakyan L. Gevorgian R. Montgomery S. Zhamkochyan
Maryam Sardar Zaka Ullah Anwar Latif Bushra Jabar Abida Perveen Muhammad Shahid Rafique Muhammad Khaleeq-Ur-Rahman Laser and Optronics Centre, Department of Physics, University of Engineering & Technology, Lahore - 54890, Pakistan
H. V. Baghdasaryan T. M. Knyazyan T. T. Hovhannisyan A. V. Daryan M. Marciniak
V. V. Sahakyan A. A. Sargsyan G. Zanyan T. S. Vardanyan B. A. Grigoryan V. M. Tsakanov
H. G. Julfayan
Grigoryan, L. Sh. Mkrtchyan, A. R. Saharian, A. A. Mkrtchyan, A. H. Khachatryan, H. F. Grigoryan, M. L. Kotanjyan, V. Kh. Harutyunyan, H. P.
A. T. Margaryan
H. B. Nersisyan H. H. Matevosyan