Energy transfer and radiative recombination processes in (Gd, Lu)3Ga3Al2O12:Pr3+ scintillators |
| |
| Affiliation: | 1. Radiochemistry Division, Bhabha Atomic Research Centre, India;2. Atomic and Molecular Physics Division, Bhabha Atomic Research Centre Trombay, Mumbai 400085, India;1. School of Physics and Physical Engineering, Qufu Normal University, Qufu, Shandong, 273165, China;2. Department of Physics, University of Science and Technology of China, Hefei, Anhui, 230026, China;1. State Key Laboratory of Materials-Orient Chemical Engineering, College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China;2. Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 210009, China;3. Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM), Nanjing Tech University, Nanjing 210009, China;1. Physics Department, University of Kashan, Kashan, I.R. Iran;2. Institute of Nanoscience and Nanotechniology, University of Kashan, Kashan, I.R. Iran;3. Research Center and Department of Medical Physics, School of Medicine, Mashhad University of Medical Sciences, Vakil Abad Blvd., Mashhad, Iran;1. Dept. of Physics, Sri Venkateswara University, Tirupati 517502, A.P., India;2. Center for Photon Information and Processing, School of Information and Communications, Gwangju Institute of Science and Technology, Gwangju 500-712, Republic of Korea;1. Graduate School of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayamacho, Ikoma, Nara, 630-0192, Japan;2. School of Engineering, Tohoku University, 6-6 Aramaki, Aoba, Sendai, Miyagi, 980-8579, Japan;3. Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto, 611-0011, Japan |
| |
| Abstract: | (GdxLu3−x)Ga3Al2O12:0.3 at.%Pr (x = 0.025, 0.05, 0.1, 0.2, 0.4, 0.6) (GLGAG:Pr) polycrystalline powders are prepared by solid-state reaction method. To better understand the luminescence mechanism, the optical diffuse reflectance, photoluminescence emission and excitation, X-ray excited luminescence spectra and decay kinetics of GLGAG:Pr were investigated in detailed, allowing the determination of energy transfer from 5d state of Pr3+ to 4f state of Gd3+, and the non-radiative relaxation from 5d to 4f state of Pr3+. Besides, the former process plays more negative role in the emission quenching of GLGAG:Pr than later one. Pr3+ ion is regarded as an ineffective activation ion in Gd-based multicomponent aluminate garnets. In addition, the wavelength-resolved thermoluminescence spectra of GLGAG:Pr were studied after UV and X-ray irradiation. It is revealed that the localized recombination processes from electron traps to lower lying 4f levels of Pr3+ occurs without populating the higher 5d levels of Pr3+. |
| |
| Keywords: | Garnets Energy transfer Radiative recombination Tunneling |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
