The C_(4)H_(10) molecule has been studied by high resolution(e,2e)spectrometer at a total energy of 1200eV and using symmetric non-coplanar kinematics.The binding energy spectra ranging up to 32eV are measured at out-...The C_(4)H_(10) molecule has been studied by high resolution(e,2e)spectrometer at a total energy of 1200eV and using symmetric non-coplanar kinematics.The binding energy spectra ranging up to 32eV are measured at out-of-plane azimuthal angles from 0° to 22° corresponding to target electron momentum from about 0.1 to 1.8 a.u.The binding energy spectra and electron momentum distributions obtained for the valence orbitals are compared with the theoretical result calculated by using restricted Hartree-Fock and density functional theory methods.The agreement between theory and experiment of orbital electron momentum distributions is generally good.展开更多
A semi-relativistic distorted wave method has been developed to calculate the differential cross section(DCS)and Stokes parameters for electron impacting excitation of gold atom at 30 eV.At large angle(≥60°)our ...A semi-relativistic distorted wave method has been developed to calculate the differential cross section(DCS)and Stokes parameters for electron impacting excitation of gold atom at 30 eV.At large angle(≥60°)our DCS results are within the experimental error limit.At small angle(≤60°)our DCS results deviate a little from the experimental data.In the whole range our DCS data are roughly the same as those of complete relativistic distorted wave(RDW)method.The P1 and P2 calculated from our semi-relativistic method both in structure and tendency are similar to those of the complete RDW method.In particularly,-P3 calculated from two kinds of relativistic methods are almost the same in magnitude and structure.The difference between our results and those of complete RDW method may come from the neglecting direct relativistic of incident electron in our calculation.By comparing the results with those of experiment and complete RDW method it is deduced that the semi-relativistic distorted wave is a convenient and reliable method.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No.19874037.
文摘The C_(4)H_(10) molecule has been studied by high resolution(e,2e)spectrometer at a total energy of 1200eV and using symmetric non-coplanar kinematics.The binding energy spectra ranging up to 32eV are measured at out-of-plane azimuthal angles from 0° to 22° corresponding to target electron momentum from about 0.1 to 1.8 a.u.The binding energy spectra and electron momentum distributions obtained for the valence orbitals are compared with the theoretical result calculated by using restricted Hartree-Fock and density functional theory methods.The agreement between theory and experiment of orbital electron momentum distributions is generally good.
基金the National Natural Science Foundation of China under Grant No.19874037.
文摘A semi-relativistic distorted wave method has been developed to calculate the differential cross section(DCS)and Stokes parameters for electron impacting excitation of gold atom at 30 eV.At large angle(≥60°)our DCS results are within the experimental error limit.At small angle(≤60°)our DCS results deviate a little from the experimental data.In the whole range our DCS data are roughly the same as those of complete relativistic distorted wave(RDW)method.The P1 and P2 calculated from our semi-relativistic method both in structure and tendency are similar to those of the complete RDW method.In particularly,-P3 calculated from two kinds of relativistic methods are almost the same in magnitude and structure.The difference between our results and those of complete RDW method may come from the neglecting direct relativistic of incident electron in our calculation.By comparing the results with those of experiment and complete RDW method it is deduced that the semi-relativistic distorted wave is a convenient and reliable method.
