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Total Cross Sections for Electron Scattering from the Isoelectronic (Z = 14) Molecules (C2H2, CO, HCN and N2) at 100-5000 eV |
| SHI De-Heng1,2,3;ZHU Zun-Lue2;SUN Jin-Feng1,2;YANG Xiang-Dong1;LIU Yu-Fang2;ZHAO Ye2 |
| 1Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065
2Department of Physics, Henan Normal University, Xinxiang 453002
3Department of Foundation, The First Aeronautical College of Air Force, Xinyang 464000 |
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| Cite this article: |
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SHI De-Heng, ZHU Zun-Lue, SUN Jin-Feng et al 2004 Chin. Phys. Lett. 21 474-477 |
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Abstract A complex optical model potential correlated by the concept of bonded atom, which considers the overlapping effect of electron clouds between the two atoms in a molecule, is employed to calculate the total cross sections for electron scattering from the isoelectronic (Z = 14) molecules (C2H2, CO, HCN, and N2) at 100-5000 eV using the additivity rule at the Hartree-Fock level. The difference between the bonded atom and the free one is that the overlapping effect of electron clouds of bonded atoms in molecules is considered. The quantitative molecular total cross section results are compared with the experimental data and with other calculations available and good agreement is obtained above 100 eV. It is shown that the additivity rule along with the complex optical model potential considering the overlapping effect of electron clouds can give results better than when uncorrelated by it. The correlating calculations are much closer to the experiments than the spherical-complex-optical-potential results in the lower energy region [Phys. Rev. A 45 (1992) 202]. Therefore, considering the overlapping effect of electron clouds in the complex optical potential could be helpful for the better accuracy of the total cross section calculations of electron scattering from molecules.
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34.80.Bm
34.80.-i
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Published: 01 March 2004
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