Subject: 回复:CCL:vibrational structure in the photoelectron spectrum

From: WEIJUN ZHENG <zhengwj=at=jhu.edu>
Date: Tue, 09 Mar 2004 15:14:23 -0500

Dear Mr. Ding,

Usually this depends on your experimental condition. 
In principle, if you used helium gas expansion to cool your anions 
and did it in the right way, the anions should be at ground state.
Therefore, the vibrational structures on the PES should correspond 
to the neutral.

People can observe some vibrational structures of the anions when 
the source condition is not cold enough. This is so called hot 
band, which shows up at the low electron binding energy side of the 
spectrum. Usually, people need some skill in tuning the source 
condition to get rid of the hot band. 

The best way to find out whether the vibrational structures are from the 
anions or the neutral or both is to look at the change of the spectrum 
at difference source conditions. 

Best Wishes,

Weijun

***************************************************
Weijun Zheng
Department of Chemistry
Johns Hopkins University
3400 N. Charles Street
Baltimore, MD 21218
Homepage: http://jhunix.hcf.jhu.edu/~wz13
*****************************************************

----- T-SJ<~ -----
4S: "6!Q8@W" <dxl=at=mail.ustc.edu.cn>
HUFZ: PGFZ6~, H}TB 9HU, 2004 IONg0:15
VwLb: CCL:vibrational structure in the photoelectron spectrum

> Dear CCL#:
> 
> !!!!We can get the vibrational structure in the photoelectron 
> spectrum (PES) of an anion molecule .
> I want to know which the vibration is corresponding to, the 
> vibration of the anionic or of the 
> neutral molecule, or maybe both of them?
> 
>    Thank you for your help!!!!!!!!!!!!!!!!!
>                         	
> !!!!!!!!!!!!!!!!!!!!!!!!!!!!Ding Xunlei
> !!!!!!!!!!!!!!!!!!!!!!!!!!!!2004-03-09
> ______________________________________________
> Ding Xunlei, Ph.D. Candidate
> Open Laboratory of Bond Selective Chemistry
> University of Science & Technology of China
> Hefei, Anhui 230026, P.R.China
> Tel.: 0086-551-3603418
> Fax.: 0086-551-3602969
> E-mail: dxl=at=mail.ustc.edu.cn
> Http://www.bsc.ustc.edu.cn/~dxl
> 
> 
> 
> 
> 
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