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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Rai, S. B. Kumar, K. Singh, A. K. |
| Description | Country affiliation: India Author Affiliation: Kumar K ( Department of Applied Physics, Indian School of Mines, Dhanbad 826 004, India. kumar.bhu@gmail.com) |
| Abstract | The europium and neodymium oxides doped nano-structured calcium aluminate phosphor samples have prepared through combustion technique and their luminescence properties are studied using laser excitations. Samples prepared in open atmosphere showed the presence of both Eu(3+) and Eu(2+) states and their ratio changes with calcination temperature. Single Eu(3+)/Eu(2+) ions doped sample has found to give broad emission at 450 nm without the persistence glow while the Eu(3+)+Nd(3+) ions codoped sample has shown persistence glow at 450 nm (Eu(2+)) on 355 nm laser excitation. Wavelength selective excitations show that 266 nm excitation gives the intense emissions from both Eu(3+) and Eu(2+) states with no afterglow but 355 nm excitation gives negligible emission from Eu(3+) ions and a strong afterglow at 450 nm wavelength. The mechanism of wavelength dependent phosphorescence has been discussed. Studies on Stark splittings and their relative intensities in emission spectra of Eu(3+) ions have shown that Eu(3+) ion can be used as excellent probe of crystal structure. |
| ISSN | 13861425 |
| Volume Number | 102 |
| e-ISSN | 18733557 |
| Journal | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2013-02-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Aluminum Compounds Chemistry Calcium Compounds Europium Luminescent Agents Nanostructures Neodymium Lasers Luminescent Measurements Oxides Spectrometry, Fluorescence Spectrophotometry, Ultraviolet Spectroscopy, Fourier Transform Infrared X-ray Diffraction Journal Article Discipline Spectroscopy |
| Content Type | Text |
| Resource Type | Article |
| Subject | Spectroscopy Atomic and Molecular Physics, and Optics Analytical Chemistry Instrumentation |
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