400-6699-117转1000
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工商注册信息已核实!参考报价: | 面议 | 型号: | Standard Types |
品牌: | incoatec | 产地: | 德国 |
关注度: | 15 | 信息完整度: | |
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产地类别 | 进口 | 供应商性质 | 总代理 |
组件类别 | 光学元件 |
组件类别 | 光学元件 |
400-6699-117转1000
LiF(200), LiF(220), LiF(420)
LiF crystal types exist in a variety of lattice planes (200, 220, 420, etc.). In the sequence (200) --> (220) --
> (420), resolution increases and reflectivity decreases (Fig. 17).
Fig. 17: Intensities of the crystals LiF(220) and LiF(420) in relation to LiF(200). (Intensity LiF(200) =
1)
LiF(200):
A universally usable crystal for the element range atomic number 19 (K) onwards; high reflectivity, high
sensitivity.
LiF(220):
Lower reflectivity than LiF(200) but higher resolution; can be used for the element range atomic number
23 (V) onwards; particularly suitable for better peak separation where peaks overlap.
Examples of the application of the LiF(220) for reducing peak overlaps:
Cr Ka1,2 - V Kb1
Mn Ka1,2 - Cr Kb1
U La1 - Rb Ka1,2
LiF(420):
One of the special crystals; can be used for the element range atomic number 28 (Ni or Co Kb1) onwards;
best resolution but low reflectivity.
Figure 17 shows a reflectivity of only 10% of that of LiF(200) for LiF(420) in the energy range around 10
keV.
PET:
A universal crystal for the elements Al to Ti (K-peaks), Kr to Xe (L-peaks) and Hf to Bi (M-peaks).
ATTENTION
The PET is the crystal with the greatest heat-expansion coefficients, i.e. temperature fluctuations are
most noticeable here.
Fundamental Principles Introduction to X-Ray Fluorescence (XRF)
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