[Wien] about the near edge x-ray absorption spectrum

[Vera Zhuang]

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!

Yushan Wang wrote:

>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:
>
>  
>
>>Yes, under the condition he also has the X-ray emission spectrum
>>obtained on the ssme energy scale.
>>
>>Yushan Wang wrote:
>>
>>    
>>
>>>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
>>>Wien at zeus.theochem.tuwien.ac.at
>>>http://zeus.theochem.tuwien.ac.at/mailman/listinfo/wien
>>>
>>>
>>>      
>>>
>>_______________________________________________
>>Wien mailing list
>>Wien at zeus.theochem.tuwien.ac.at
>>http://zeus.theochem.tuwien.ac.at/mailman/listinfo/wien
>>
>>    
>>
>
>_______________________________________________
>Wien mailing list
>Wien at zeus.theochem.tuwien.ac.at
>http://zeus.theochem.tuwien.ac.at/mailman/listinfo/wien
>  
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://zeus.theochem.tuwien.ac.at/pipermail/wien/attachments/20040730/bc979036/attachment.html