مرکز منطقه ای اطلاع رساني علوم و فناوري - Luminescent Properties of <formula formulatype="inline"> <img src="/images/tex/20775.gif" alt="{\\rm Eu}^{3+}"> </formula>-activated <formula formulatype="inline"> <img src="/images/tex/21341.gif" alt="(70\\hbox {-}x){{\\rm B}_2}{\\rm O}

Title :

Luminescent Properties of ${\\rm Eu}^{3+}$ -activated $(70\\hbox {-}x){{\\rm B}_2}{\\rm O}_3\\hbox {-}x{\\rm</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Author : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>Xin-Yuan Sun ; Wen-Feng Wang ; Xiao-Guang Yu ; Yu-Nong Li ; Xin-Xin Yang ; Hao-Hong Chen ; Zhi-jun Zhang ; Jing-Tai Zhao</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Author_Institution : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>Dept. of Phys., Jinggangshan Univ., Ji´an, China</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Volume : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>61</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Issue : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>1</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>fYear : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>2014</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>fDate : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>Feb. 2014</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Firstpage : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>380</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Lastpage : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>384</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Abstract : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>Borogermanate scintillating glasses with nominal composition of (70-x)B<sub>2</sub>O<sub>3</sub>-xGeO<sub>2</sub>-29Gd<sub>2</sub>O<sub>3</sub>-1Eu<sub>2</sub>O<sub>3</sub> (20 ≤ x ≤ 45) were synthesized by melt-quenching method. Their structure and optical properties were characterized by transmittance spectra, Fourier transform infrared spectra (FTIR), Raman spectra, excitation and emission spectra, and X-ray excited luminescence (XEL) spectra in detail. Transparency of the as-synthesized borogermanate glasses exceeds 80% in 400-800 nm regions. The cut-off edges of borogermanate glasses are in the vicinity of 308 nm, and they shift towards longer wavelength (red-shifted) with the elevated x values. Both glass density and mean molecular weight increase in a linear relationship with increasing x values. With increasing x values, the characteristic emission intensity of both Gd<sup>3+</sup> and Eu<sup>3+</sup> ions decrease progressively under 276 nm excitation, while these emission intensities seem irregular under 394 nm excitation. The strongest X-ray excited luminescence (XEL) intensity occurs at x = 35 glass sample, which is improved about 35% with comparison to the x = 20 one. Additionally, the information on glass structure is also discussed by FTIR and Raman spectra.</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Keywords : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>Fourier transform spectra; Raman spectra; X-ray emission spectra; borate glasses; europium compounds; gadolinium compounds; germanate glasses; glass structure; infrared spectra; melt processing; photoluminescence; quenching (thermal); red shift; scintillation; transparency; B<sub>2</sub>O<sub>3</sub>-GeO<sub>2</sub>-Gd<sub>2</sub>O<sub>3</sub>-Eu<sub>2</sub>O<sub>3</sub>; FTIR; Fourier transform infrared spectra; Raman spectra; X-ray excited luminescence spectra; borogermanate scintillating glasses; emission spectra; excitation spectra; glass density; glass structure; luminescent properties; mean molecular weight; melt quenching; optical properties; red shift; transmittance spectra; transparency; Absorption; Energy exchange; Glass; Ions; Luminescence; Sun; Vibrations; <formula formulatype=$ ${rm Eu}^{3+}$ -activated borogermanate scintillating glasses; Energy transfer; X-ray excited luminescence; photoluminescence;