<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=ISO-8859-1">
<title></title>
</head>
<body text="#000000" bgcolor="#ffffff">
Well, think about basic physics. The energy seperation of top of the
occupied density of states and the bottom of the unoccupied density of
states is band gap. The former could be extracted from X-ray emission
and the later fron X-ray absorption. We do this all the time at
Advanced Light Source in Berkeley! <br>
<br>
Yushan Wang wrote:<br>
<blockquote type="cite"
cite="midPine.SOL.4.58L.0407301140040.4574@copland.udel.edu">
<pre wrap="">hi, the band gap mentioned above is not the x-ray emmision spectrum, but
the band between the top of the valence band and the bottom of the
conduction band. how can you get it from the near edge x-ray absorption
spectrum?
yushan
On Fri, 30 Jul 2004, Vera Zhuang wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Yes, under the condition he also has the X-ray emission spectrum
obtained on the ssme energy scale.
Yushan Wang wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Dear users,
a famous professor insists that from the near edge x-ray absorption
spectrum he can
obtain the band gap of semiconductor. do you think so?
yushan
_______________________________________________
Wien mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Wien@zeus.theochem.tuwien.ac.at">Wien@zeus.theochem.tuwien.ac.at</a>
<a class="moz-txt-link-freetext" href="http://zeus.theochem.tuwien.ac.at/mailman/listinfo/wien">http://zeus.theochem.tuwien.ac.at/mailman/listinfo/wien</a>
</pre>
</blockquote>
<pre wrap="">_______________________________________________
Wien mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Wien@zeus.theochem.tuwien.ac.at">Wien@zeus.theochem.tuwien.ac.at</a>
<a class="moz-txt-link-freetext" href="http://zeus.theochem.tuwien.ac.at/mailman/listinfo/wien">http://zeus.theochem.tuwien.ac.at/mailman/listinfo/wien</a>
</pre>
</blockquote>
<pre wrap=""><!---->
_______________________________________________
Wien mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Wien@zeus.theochem.tuwien.ac.at">Wien@zeus.theochem.tuwien.ac.at</a>
<a class="moz-txt-link-freetext" href="http://zeus.theochem.tuwien.ac.at/mailman/listinfo/wien">http://zeus.theochem.tuwien.ac.at/mailman/listinfo/wien</a>
</pre>
</blockquote>
</body>
</html>