摘要
The valence-shell excitations of nitrous oxide are studied by fast electron energy loss spectroscopy.From the spectra measured at 2.5keV and scattering angles of 3.5°-8.5°,it is found that the asymmetric peak of the transition B 1△ can be well fitted by Haarhoff-Van der Linde function,while the symmetric peaks of the transitions of C1Π and D1∑+ can be well fitted by the Voigt function.The parameters of the peak profiles of B1△,C1Π and D1∑+,i.e.,their energy level positions and linewidths,are determined.With the aid of these parameters,the overlapping spectra measured at the low-energy electron impact can be deconvolved,which provides the possibility to determine the quantitative differential cross sections.The present results also show that the peak profiles of the transitions of B1△,C1Π and D1∑+ are independent of the momentum transfer.
作者
LIU Ya-Wei
WANG You-Yan
ZHU Lin-Fan
刘亚伟;王友燕;朱林繁(Hefei National Laboratory for Physical Sciences at Microscale,Department of Modern Physics,University of Science and Technology of China,Hefei 230026)
基金
Supported by the National Natural Science Foundation of China under Grants Nos 10734040,10874168 and 10979040
the National Basic Research Program of China under Grant No 2010CB923301
the Research Fund for the Doctoral Program of Higher Education of China.
