从Eu^(3+)发射光谱获得J-O参数Ω_2、Ω_4

Obtaining of J-O Parameters (Ω_2,Ω_4) from Emission Spectra of Eu^(3+)

测量了Eu3 + 掺杂的PbF2 和H3 BO3 不同配比玻璃材料的吸收光谱、发射光谱及激发光谱 ,计算了各不同配比样品的折射率。根据稀土离子Eu3 + 光学跃迁矩阵元的特点 ,从发射光谱获得了Eu3 + 光学跃迁的J O参数Ω2 和Ω4 ,并研究了Ω2 和Ω4 对xPbF2 ( 79 5-x)H3 BO3 0 5Eu2 O5玻璃体系组分的依赖关系 ,提出了用Eu3 + 离子作为玻璃材料微观环境探针 ,并通过实验证实了其可行性。

The trivalent rare earth ions have partially filled 4 f\+N shell.In the free atomic states,4 f\+N electrons contributes to same parity.In the bounded state,static crystal field leads to the mixing of opposite parity configuration,accordingly electronic dipole transition between 4 f\+N configuration is allowed.Judd Ofelt obtained the relationship between crystal field and the transition intensity based on the configuration mixing theory,and built up a method for calculating the transition intensity parameters from the absorption spectra.But the use of J O theory is limited,because in a lot of conditions the measurement of absorption spectra is difficult. In this work,the absorption,excitation and emission spectra of Eu 3+ doped glasses,which contained PbF 2 and H\-3BO\-3,was measured.The refractive index of different glasses was calculated.The Ω 2 and Ω 4 parameters of Eu\+\{3+\} for optical transition were calculated,in terms of reduced matrix U (t) (λ=2,4,6) character for optical transitions.The dependence of the Ω 2 and the Ω 4 parameter on the content of H 3BO 3 was obtained and discussed.The purpose of this work is that,using the Eu\+\{3+\} as a probe to study the microenvironment in glasses.Lastly we attest to the possibility of this purpose in experiment.