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浓度淬灭
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  concentration quenching
    No concentration quenching was observed with increasing the concentration of Yb 3+ ions in fluorozirconate glasses.
    增加Yb3+ 离子掺杂浓度不会发生浓度淬灭效应。
短句来源
    The increase of Cr 3+ ion concentration will cause the increase of emission intensity of glass-ceramics, but it will cause concentration quenching and decrease the effective luminescent efficiency of Cr 3+ ion.
    Cr3 +离子浓度的增加使微晶玻璃的发光强度增加 ,但引起浓度淬灭 ,降低Cr3 +离子的有效发光效率。
短句来源
    No concentration quenching phenomenon occurs in EuGa_2S_4, and the emission peak of Eu~(2+) ion is about at 544 nm.
    同时观察到EuGa2S4具有发光,发射峰靠近544nm,Eu在其中既是基质离子,也是激活剂离子,并没有出现浓度淬灭现象;
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  “浓度淬灭”译为未确定词的双语例句
    Full-concentration ErP_5O_(14) noncrystalline not only hasn't concentartion-quenching of main fluorescent line but also exists stronger energy transfer resulted from its unique crystalline structure.
    全浓度ErP_5O_(14)非晶由于其独特的晶体结构,使其重要的荧光线即未浓度淬灭,又存在较强的能量传递现象。
短句来源
    Therefore, it is of importance to study the photoluminescence properties of Er-doped and Er/Yb co-doped system in various glasses for the development for lasers and amplifiers working at 1.5 μmIn this dissertation, Er-doped, Yb-doped and Er/Yb co-doped borate-silicate laser glasses with various concentrations of Er and Yb were fabricated by high-temperature solid-state reaction.
    本文采用固相反应方法,制备了不同掺杂浓度的掺Er、掺Yb和Er/Yb共掺硼硅酸盐激光玻璃及氟化物玻璃陶瓷。 通过对吸收光谱、光致荧光光谱以及荧光寿命的测量,计算了掺杂离子在硼硅酸盐中的吸收截面和发射截面,分析了浓度淬灭、能量合作上转换等因素对光致荧光特性的影响。
短句来源
    The absorption and photoluminescence (PL) spedctra, together with the lifetime of Er~(3+)>+-~4I_(13/2) were measured.
    对吸收光谱、光致荧光光谱以及荧光寿命进行了测量,计算了Er~(3+)离子在硼硅酸盐中的吸收截面、发射截面,分析了浓度淬灭等因素对光致荧光特性的影响。
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  concentration quenching
It is shown that the luminescence efficiency increases with an increase in the gallium sulfide content due to the displacement of the concentration quenching boundary of Nd3+luminescence with a change in the glass matrix composition.
      
Concentration Quenching of Luminescence of Rare-Earth Ions in Chalcogenide Glasses
      
We suggest that the increase in τ due to adsorption appreciably exceeds the concentration quenching of excited uranyl ions in the course of crystallization of deuterated sulfuric acid.
      
There is no concentration quenching of uranyl up to [UO22+] = 0.14 M.
      
The phenomenon of concentration quenching of the luminescence from donor ions in crystals of La1-xCexF3 solid solutions was studied.
      
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In this paper, the luminescence properties of Dy3+, Sm3+ and Ce3+ in M3La2(BO3)<(M=Ca, Sr, Ba) are reported.M3La2(BO3)4(M = Ca, Sr, Ba) are the compounds with orthorhombic structure. The site symmetry of RE3 + (RE = Dy, Sm, Ce) is lower in Ca3La2 (BO3)4 than that in Sr and Ba compounds .We observe that the energy levels of RE3 ±ions are much more split in Ca matrix.This is well corresponding with the relationship between the splitting of energy levels and site symmetry.The ratio, R = I4F9/2-66H13/2/I4F9/2-6H15/2,of...

In this paper, the luminescence properties of Dy3+, Sm3+ and Ce3+ in M3La2(BO3)<(M=Ca, Sr, Ba) are reported.M3La2(BO3)4(M = Ca, Sr, Ba) are the compounds with orthorhombic structure. The site symmetry of RE3 + (RE = Dy, Sm, Ce) is lower in Ca3La2 (BO3)4 than that in Sr and Ba compounds .We observe that the energy levels of RE3 ±ions are much more split in Ca matrix.This is well corresponding with the relationship between the splitting of energy levels and site symmetry.The ratio, R = I4F9/2-66H13/2/I4F9/2-6H15/2,of Dy3+emission is decreasing with the change of M2+ from Ca2 + to Ba2+. According to Table 1, the blue emission of Dy3 + is more intense than its yellow one in Ca matrix.Notice that, although the site symmetiy of Dy3+ in Sr and Ba matrices is the same, the R are different. This shows that the ratio of yellow to blue emission of Dy3 + is not only affected by the site symmetry, but also by the composition of the compounds.The charge transfer bands of Sm3+ move to longer wavelength with the change of M2 + (from Ca2+ to Ba2+). This phenomenon has been observed and discussed for Eu3 + in the same matrices. The 4f electron configurations of Sm3+, and Eu3+ arc 4f5 and 4f6 respectively. When get an electron from coordination anion, Eu3+ will become 4f7 state(half-filled), which is more stable than the 4f6 state for Sm3 + . Therefore, the energy of charge transfer band of Sm3+ is higher than that of Eu3+ in the same condition. Table 2 makes a comparison.The d-f emission bands of Ce3+ peak at 436 nm in Ca matrix and 424 nm in Sr and Ba compounds respectively.In Sr3La2(1-x)(BO3)4 : RE2x3+ ( RE = Dy, Sm, Ce ), the concentration quenching of Dy3+ and Sm3+ luminescence starts at x=0.02 and x = 0.04 respectively; Ce3+ has higher quenching concentration, no large quenching is observed when x amounts to 0.3.

本文报导了Dy~(3+),Sm~(3+)和Ce~(3+)离子在M_3La_2(BO_3)_4(M=Ca,Sr,Ba)基质中的激发与发射光谱;研究了Dy~(3+)离子黄蓝发射的相强度随基质化合物的组成和结构的不同而呈现的变化规律;讨论了Sm~(3+)离子电荷迁移激发带的能量与基质中近邻阳离子的关系并分析了Sm~(3+)和Eu~(3+)离子4f电子构型对电荷迁移带能量的影响。本文还给出了Dy~(3+),Sm~(3+)和Ce~(3+)离子发光的浓度淬灭值。

Full-concentration ErP_5O_(14) noncrystalline not only hasn't concentartion-quenching of main fluorescent line but also exists stronger energy transfer resulted from its unique crystalline structure. This paper researches the multi-photon absorption phenomenon of Er~(3+) ions in ErP_5O_(14) noncrystalline by 1.06μm laser of Nd~(3+): YAG pulse laser, proves that exists the direct ~4I_(15/2)→~2H_(11/2) two-photon absorption and sequential excitation of ~4I_(9/2)→~4F_(5/2) when laser power is stronger enough.

全浓度ErP_5O_(14)非晶由于其独特的晶体结构,使其重要的荧光线即未浓度淬灭,又存在较强的能量传递现象。本文用调Q的Nd~(3+)∶YAG 1.06μm脉冲激光,研究了ErP_5O_(14)非晶中Er~(3+)离子的多光子吸收现象,证明Er~(3+)离子吸收1.06μm激光导致了~4I_(15/2)→~2H_(11/2)的直接双光子吸收,并且在激光功率密度较大时,还会导致明显的相继~4I_(9/2)→~4F_(5/2)吸收而产生的相继激发三光子过程。

The Eu3+ and Sm3+-doped (LaO)3BO3 have been synthesized with solid state reaction. With the increase of Eu3+ doping level, the charge transfer excitation band (CTB) of Eu3+shifts to shorter wavelength and the red-to-orange intensity ratio I(5D,-7F2)/I(5D0-7F1) of Eu3+emission exhibits a convex behavior with a maximun at about xEu= 0. 2. In comparison with the X-ray diffraction patterns of these materials, it has been concluded that these phenomena are mainly due to the effect of structure distortion. The concentration...

The Eu3+ and Sm3+-doped (LaO)3BO3 have been synthesized with solid state reaction. With the increase of Eu3+ doping level, the charge transfer excitation band (CTB) of Eu3+shifts to shorter wavelength and the red-to-orange intensity ratio I(5D,-7F2)/I(5D0-7F1) of Eu3+emission exhibits a convex behavior with a maximun at about xEu= 0. 2. In comparison with the X-ray diffraction patterns of these materials, it has been concluded that these phenomena are mainly due to the effect of structure distortion. The concentration dependence of the luminescence intensity of Eu3+ and Sm3+ in this material has also been studied and could be explained as an exchange interaction for Eu3+ and dipole-quadrupole interacnon for Sm3+ respectively.

研究了紫外光激发下,(LaO)3BO3基质中Eu(3+)和Sm(3+)的光谱性质,Eu(3+)和Sm(3+)的电荷迁移激发带及发光强度随组成和结构变化的规律性,并探讨了Eu(3+)和Sm(3+)自身浓度淬灭的机理。

 
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