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2010 | 117 | 1 | 104-110
Article title

Optical Spectroscopy of the Nd^{3+} Luminescence Centres in the Sr_{4}B_{14}O_{25}:Nd Crystal

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EN
Abstracts
EN
Optical absorption, emission and luminescence kinetics of Nd^{3+} centres in the new borate crystal with Sr_{4}B_{14}O_{25}:Nd (Nd content 0.2 wt.%) composition are investigated and analysed. The oscillator strengths (P_{theor} and P_{exp}) for observed absorption transitions and phenomenological intensity parameters Ω_t (Ω_2=1.59×10^{-20} cm^{-1}, Ω_{4} = 2.06 × 10^{-20} cm^{-1}, and Ω_{6} = 2.28 × 10^{-20} cm^{-1} were calculated based on the standard Judd-Ofelt theory. Using Ω_t parameters the radiative transitions rates (W_{r}), branching ratios (β) and radiative lifetime (τ_{rad}) for Nd^{3+} centres in the Sr_{4}B_{14}O_{25}:Nd crystal were calculated and analysed. Measured lifetime (τ_{exp} = 105 and 93 μs at T = 10 and 300 K, respectively) is compared with this calculated (τ_{rad} = 331 μs) and quantum efficiency for Nd^{3+} centres from ^{4}F_{3/2} emitting level in the Sr_{4}B_{14}O_{25}:Nd crystal is estimated (η ≅ 30%). Incorporation peculiarities and local structure of Nd^{3+} luminescence centres in the Sr_{4}B_{14}O_{25} crystal and corresponding glass with 4SrO-7B_{2}O_{3} composition are discussed on the basis of referenced X-ray diffraction data and presented results.
Keywords
Year
Volume
117
Issue
1
Pages
104-110
Physical description
Dates
published
2010-01
References
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Document Type
Publication order reference
YADDA identifier
bwmeta1.element.bwnjournal-article-appv117z117kz
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