A5001291646- Luminescence Properties of Advanced Materials
- Radiation Detection and Scintillator Technologies
- Nuclear Physics and Applications
- Atomic and Subatomic Physics Research
- Advancements in Semiconductor Devices and Circuit Design
- Silicon and Solar Cell Technologies
- Medical Imaging Techniques and Applications
- Semiconductor materials and interfaces
- Semiconductor materials and devices
- Glass properties and applications
- Perovskite Materials and Applications
- Nuclear materials and radiation effects
- Silicon Carbide Semiconductor Technologies
- Solid-state spectroscopy and crystallography
- Integrated Circuits and Semiconductor Failure Analysis
- Solid State Laser Technologies
- Thin-Film Transistor Technologies
- Analog and Mixed-Signal Circuit Design
- Terahertz technology and applications
- Advanced Semiconductor Detectors and Materials
- Advanced Photocatalysis Techniques
- Photorefractive and Nonlinear Optics
- Gas Sensing Nanomaterials and Sensors
- Semiconductor Quantum Structures and Devices
- Particle Detector Development and Performance
Bhabha Atomic Research Centre
2015-2025
University of Delhi
2022-2024
Homi Bhabha National Institute
2016-2024
Delhi Technological University
2024
Bhabha Atomic Research Center Hospital
2010-2023
Presidency University
2022
Kyungpook National University
2019-2020
Indian Institute of Technology Dhanbad
2019
Jamia Millia Islamia
2019
University of Tennessee at Knoxville
2013-2016
When Eu(3+) ions occupy Ca(2+) sites of CaMoO(4), which has a body centered tetragonal structure with inversion symmetry, only the magnetic dipole transition ((5)D(0)→(7)F(1)) should be allowed according to Judd-Ofelt theory. Even if there are few distortions in environment, its intensity more than that electric ((5)D(0)→(7)F(2)). We report here opposite effect experimentally and ascribe this polarizability MoO(4) tetrahedron, is neighboring EuO(8) (symmetric environment). The contribution...
Single crystals of Gd3Ga3Al2O12 : Ce with different codopants were successfully grown using the Czochralski technique. Optical and scintillation properties these codoped studied in detail including absorption, photoluminescence excitation emission, decay time thermoluminescence. This study revealed that while boron codoping improves light output energy resolution decreases self-absorption crystals, calcium affects their opposite manner. In addition to antisite defects, effect room...
Temperature-dependent photoluminescence to understand negative thermal quenching in Zn 2 GeO 4 , and Pr 3+ doping for trap tuning the enhanced formation of defect states leading ultralong (>18 h) X-ray persistent luminescence.
Lanthanide-doped fluoride nanoscintillators have received tremendous attention due to their high photochemical stability and tunable X-ray excited optical luminescence compared traditional inorganic scintillators.
Abstract In the present work, we report extensive GEANT4 simulations in order to study dependence of sensitivity Gd 3 Ga Al 2 O 12 :Ce (GAGG:Ce) scintillation crystal based detector on thickness crystal. All are made considering a thermalised Am-Be neutron source. The validated, qualitatively and quantitatively, by comparing simulated energy spectra values with those obtained from experimental measurements carried out using two different thicknesses our own experiment (0.5 mm mm) validated...
Materials with optical multifunctionality such as photoluminescence (PL), radioluminescence, and thermoluminescence (TL) are a boon for sustainable society. BaHfO3 (barium hafnium oxide [BHO]) under UV irradiation demonstrated visible PL endowed by oxygen vacancies (OVs). Eu3+ doping in BHO (BHOE) introduces f-state impurity levels just below the conduction band both Eu@Ba Eu@Hf sites, causing efficient host-to-dopant energy transfer, generating intense 5D0 → 7F1 magnetic dipole transitions...
Organic-inorganic nanocomposite self-standing films of Gd3Ga3Al2O12 (GGAG) uniformly dispersed in poly(methyl methacrylate) (PMMA) and polystyrene polymer are prepared for radiography application. GGAG:Ce nanoscintillator has been chosen because its high light output fast decay time. The nanopowder GGAG is synthesized by coprecipitation method the matrix a simple blending technique. thickness range 150-450 μm with very inorganic content achieved this These characterized their uniformity,...
An integrated approach was used to characterize Eu2+ doped CsCaCl3 and CsCaI3 crystals theoretically experimentally. The temperature dependence of photoluminescence excitation, emission, decay time studied better understand the energy transport migration mechanism in these materials. broadening redshift emission with increasing explained for both by simultaneous quenching interaction states lattice vibration. unusual increase ascribed presence a lowered radiative rate slightly above emitting...
This work demonstrates an ultralong X-ray and UV-persistent bright green emitting MgGa 2 O 4 :Mn spinel phosphor for tunable white light diodes.
Materials that can depict persistent deep red light under both ultraviolet (UV) and X-ray illumination be a boon to sustainable economy, particularly for optical imaging, solid state lighting, anticounterfeiting applications. Herein, we have made series of compounds starting from ZnGa2O4:Cr3+ ZnAl2O4:Cr3+ (individual spinel) by substituting the varied concentration Al3+ in place Ga3+ ZnGa2-xAlxO4:Cr3+ (solid solution). By virtue structural defect engineering doping strategy, photo...