Perturbing influence of doubly excited configurations upon the electric-dipole transition amplitudes of rare-earth ions in crystals

1989 ◽  
Vol 39 (1) ◽  
pp. 517-522 ◽  
Author(s):  
Lidia Smentek-Mielczarek ◽  
B. Andes Hess Jr.
1999 ◽  
Vol 658 (3) ◽  
pp. 197-216 ◽  
Author(s):  
H.Y. Ji ◽  
G.L. Long ◽  
E.G. Zhao ◽  
S.W. Xu

2005 ◽  
Vol 39 (2) ◽  
pp. 355-363 ◽  
Author(s):  
Bijaya K Sahoo ◽  
Sonjoy Majumder ◽  
Holger Merlitz ◽  
Rajat Chaudhuri ◽  
B P Das ◽  
...  

2017 ◽  
Vol 4 (8) ◽  
pp. 086305 ◽  
Author(s):  
Jinqiao Long ◽  
Tianman Wang ◽  
Zhirong Luo ◽  
Yong Gao ◽  
Baoling Song ◽  
...  

Author(s):  
Shubha Tripathi ◽  
Manish Kumar Mishra ◽  
Vikas Kumar Jain ◽  
Ratnesh Tiwari ◽  
Neha Dubey

The chapter reports synthesis and characterization of europium-doped Y4Al2O9 phosphor for display and dosimetric applications. The europium-activated Y4Al2O9 (YAM) phosphor is synthesized via solid state reaction method. Synthesized phosphors were characterized by powder x-ray diffraction (PXRD) techniques, scanning electron microscopy (SEM) technique, and transmission electron microscopy (TEM) technique. Particle size calculated from TEM analysis and crystallite size was calculated by Scherer's formula. All synthesized phosphor for different concentration of europium ion were studied by photo, thermo, and mechanoluminescence study. It is found that for photoluminescence analysis of Eu3+ doped phosphor has prominent spectra in red region and electric dipole transition (5D0 → 7F2) dominant over the magnetic dipole transition (5D0 → 7F1) due to non-centro symmetry between rare earth ions. Broad excitation spectra found for photoluminescence study.


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