摘要
Electron energy loss spectra of inner-shell excitations of 2p electrons of argon are measured at an incident electron energy of 2500eV and scattering angles of 0°and 4°.The dipole-forbidden transitions of 2_(p3/2)^(-1)4p and 2_(p3/2)^(-1)5p are observed in the measured spectra and assigned based on the calculations of the Cowan code.The positions and line widths for the excitations of 2_(p3/2)^(-1)nl and 2_(p1/2)^(-1)nl(n≤5)of argon are determined.The present results show that the line widths of the electric quadrupole transitions of 2_(p3/2)^(-1)4p[5/2+3/2]_(2)and the electric monopole one of 2p_(3/2)^(-1)4p[1/2]0 are less than those of the dipole-allowed transitions.
作者
任林茂
王友燕
李东东
苑震生
朱林繁
REN Lin-Mao;WANG You-Yan;LI Dong-Dong;YUAN Zhen-Sheng;ZHU Lin-Fan(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 Grant Nos 10734040,10874168 and 10979040
the National Basic Research Program of China under Grant No 2010CB923301.