Department of Physics, Sri Venkateswara University, Tirupati 517 502, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2012 Nov;97:963-74. doi: 10.1016/j.saa.2012.07.100. Epub 2012 Aug 4.
Spectroscopic investigations on different concentrations (0.1, 0.5, 1.0, 1.5 and 2.0mol%) of Pr(3+) and Nd(3+) doped strontium lithium bismuth borate glasses have been done. X-ray diffraction, SEM with EDS, absorption and luminescence spectra were recorded for all the glass matrices and analyzed. X-ray diffraction profiles and SEM images conformed amorphous nature of investigated glass samples. EDS spectra of host glass and Pr(3+)doped glass matrices gave information about the chemical composition of glass samples. From the absorption spectra of Pr(3+) and Nd(3+) ions, Judd-Ofelt (J-O) intensity parameters (Ω(λ),λ=2, 4 and 6) have been calculated and compared with other glass matrices. The emission characteristics such as radiative lifetimes (τ(R)), measured and calculated branching ratios (β) and stimulated emission cross-sections (σ(P)) have been obtained for the observed emission transitions of Pr(3+) and Nd(3+) ions in the above glass matrix for all the concentrations. From the emission spectra of Pr(3+) and Nd(3+) doped glass matrices, the effect of concentration on the quenching of intensity of (1)D(2)→(3)H(4) transition of Pr(3+) ion and (4)F(3/2)→(4)I(9/2), (4)I(11/2) and (4)I(13/2) transitions of Nd(3+) have been studied and discussed.
对不同浓度（0.1、0.5、1.0、1.5 和 2.0mol%）的 Pr(3+)和 Nd(3+)掺杂的锶锂铋硼酸盐玻璃进行了光谱研究。记录了所有玻璃基质的 X 射线衍射、SEM 与 EDS、吸收和发光光谱，并对其进行了分析。X 射线衍射谱和 SEM 图像证实了所研究的玻璃样品的非晶态性质。EDS 光谱分析了基质玻璃和 Pr(3+)掺杂玻璃基质的化学成分。从 Pr(3+)和 Nd(3+)离子的吸收光谱中，计算了 Judd-Ofelt（J-O）强度参数（Ω(λ)，λ=2、4 和 6），并与其他玻璃基质进行了比较。获得了观察到的 Pr(3+)和 Nd(3+)离子在上述玻璃基质中的发射跃迁的发射特性，如辐射寿命（τ(R)）、测量和计算的分支比（β）和受激发射截面（σ(P)）。从 Pr(3+)和 Nd(3+)掺杂玻璃基质的发射光谱中，研究和讨论了浓度对 Pr(3+)离子的（1）D(2)→(3)H(4)跃迁和 Nd(3+)的（4）F(3/2)→(4)I(9/2)、(4)I(11/2)和(4)I(13/2)跃迁强度猝灭的影响。
