發(fā)布時(shí)間：2018-08-28 17:11

【摘要】：同一樣品不同厚度(b_1和b_2)的兩單光束譜ф_(b_1)和ф_(b_2)經(jīng)線性組合得到雜化單光束譜ф_α=αф_(b_1)+(1-α)ф_(b_2)=αф_0e-Kb_1+(1-α)ф_0e~(-Kb_2),α為雜化系數(shù)。通過改變雜化系數(shù)α,就可獲得任意強(qiáng)度的雜化譜ф_α。系統(tǒng)研究了雜化光譜ф_α的性質(zhì)。研究表明,只要控制合適的條件,則厚度為(b_2-αb_2+αb_1)的真實(shí)樣品的單光束譜ф_b(b=b_2-αb_2+αb_1)與雜化譜ф_α高度相似,ф_α的失真程度可忽略不計(jì)。也就是說,厚度在b_1~b_2間任一厚度b的真實(shí)樣品的單光束譜都可用雜化譜ф_α來表達(dá),ф_α≈ф_b。因此,不需制備厚度為b的樣品,通過改變雜化系數(shù)α就可獲得研究者所希望強(qiáng)度的單光束譜ф_b。雜化譜方法有望在扣除背景干擾等方面得到廣泛應(yīng)用。
[Abstract]:Two single beam spectra of the same sample (bStu1 and bsti2) have been obtained by linear combination of the two single beam spectra of the same thickness (bStub1 and bStub2). The hybrid single beam spectrum 偽 = 偽 ~ (B _ (1) (1- 偽) _ (b2) = 偽 -tit 0e-Kb1 (1- 偽) ~ (-Kb2) can be obtained by linear combination. A is a hybrid coefficient. By changing the hybrid coefficient 偽, a hybrid spectrum of arbitrary intensity can be obtained. The properties of hybrid spectra were systematically studied. The results show that the single beam spectrum of the real sample with the thickness of (bstu- 偽 b 2 偽 b _ 1) is very similar to that of the hybrid spectrum, and the distortion is negligible, provided that the appropriate conditions are controlled. The results show that the single beam spectrum of the real sample with the thickness of (bstu- 偽-b 2 偽 b _ 1) is similar to that of the hybrid spectrum, and that the single beam spectrum of the real sample is very similar to that of the hybrid spectrum, and the distortion of the real sample is negligible. That is to say, the single beam spectrum of the real sample with any thickness b in the b_1~b_2 can be expressed by the hybrid spectrum. Therefore, a single beam spectrum of desired intensity can be obtained by changing the hybrid coefficient 偽 without preparing a sample with a thickness of b. Hybrid spectrum method is expected to be widely used in background interference reduction.
【作者單位】： 華南理工大學(xué)化學(xué)與化工學(xué)院;
【基金】：國家自然科學(xué)基金項(xiàng)目(20873136)資助
【分類號】：O657.33;O644.1

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