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美玉之国

铁杆木虫 (正式写手)

树化玉虫

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rabbit7708(金币+1):谢谢应助,辛苦了!:)
用紫外吸收光谱来计算禁带,可能要用到ERT方程,Kuhn等人的三流理论和切线法来处理。我这有篇文献不知是否有用。我没有56邮箱。把你的邮箱告诉我吧。
在努力中享受快乐!
11楼2007-03-22 15:57:50
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dicmi

铜虫 (小有名气)

12楼2007-03-22 23:19:57
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helenhao

金虫 (正式写手)

to美玉之国:能否给我也发一份,谢谢了,我的邮箱hyhao79@yahoo.com.cn
13楼2007-03-23 00:00:47
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hot_cool

金虫 (小有名气)

This is one way ?!

★ ★
daiqiguang(金币+2):谢谢应助
To my knowledge, this is one way to determine the absorption edge: find the inflection point on the absorption band in the higher wavelength/lower energy region; draw a tangent line at this point and extend all the way to the x axis; the intercept on the x axis is determined as the absorption edge.

In some case, if higher wavelength side is close to a linear fit, some people just find the intercept of this straight line at the x axis.

To a physicist, they would say that we need to figure out what type of charge transfer transition we have. If necessary, the plot should be also converted into Kubelka-Munk unit. A general power law can be then used to determine if the transition is direct or indirect; allowed or forbidden. Anyway, that is really confusing, at least to me.

[ Last edited by hot_cool on 2007-3-23 at 00:38 ]
14楼2007-03-23 00:36:24
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