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| 本帖產(chǎn)生 1 個 翻譯EPI ，點擊這里進行查看 | |||
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[求助]
翻譯 與高分子材料相關
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Emission and excitation spectra of powders were recorded on a ARC spectrometer (monochromators of 300mm focal length (1200 gmm−1), a 450W Xe-light source, Photomultiplier tube P2) at an angle of incidence of ca. 50◦ using a praying mantis type sample set-up. Reflectance spectra were obtained using an integrating sphere with a diameter of 70mm and 10mm port opening versus commercial white and black references (Labsphere), and BaSO4, respectively. Transparent monoliths were prepared in 1 cm plastic cuvettes, allowing standard absorption and luminescence measurements. The intensity of the 450W Xe source was detected with an Acton Photomultiplier tube P2. The excitation spectra were measured against Lumogen Red doped polymethylmethacrylate (doping level 50 ppm) powder and a polished disk of 3mm thickness, respectively, to evaluate the transparent monoliths. The Lumogen Red, with a constant quantum yield of 42% in the excitation range between 250 nm and 500 nm was generously provided by BASF/Ludwigshafen. It should be pointed out that the quantum yields given may be imprecise by an estimated margin of ±10%, however, the general trends described here will not be affected. |
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【答案】應助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
綠野繁華: 金幣+20, 翻譯EPI+1, ★★★很有幫助 2013-05-26 08:54:00
綠野繁華: 金幣+20, 翻譯EPI+1, ★★★很有幫助 2013-05-26 08:54:00
| 電弧光譜儀(300毫米焦距的單色器(1200(gmm)−1),450w的xe光源, P2光電倍增管) 在大約50◦的入射角使用螳螂型的樣例設置記錄了粉末的發(fā)射光譜和激發(fā)光譜。分別對市售的白(染料)參照樣品和黑（染料）參照樣品(藍菲光學公司)以及BaSO4使用直徑70毫米和10毫米端口開度的積分球來測得各自的反射率光譜。透明的獨石在1厘米的塑料比色皿中制備,可以進行標準吸收和發(fā)光量的測量。450w的Xe源強度通過阿克頓P2光電倍增管來探測。分別測定摻雜有機玻璃(摻雜程度50ppm)的紅（染料）粉末和3mm厚的拋光磁盤的激發(fā)光譜來鑒定透明獨石。激發(fā)范圍在250nm和500nm之間的42%量子產(chǎn)率常數(shù)的紅（染料）是由路德維希港的巴斯夫公司慷慨提供的。需要指出的是得出的量子產(chǎn)率給可能無法精確估計到±10%的范圍內(nèi),然而,這里描述的主要趨勢是不會受到影響的。 |
3樓2013-05-24 20:02:43
2樓2013-05-24 15:06:07
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