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feynman1965

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[ÇóÖú] electrostatic potential

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The calculation of the atomic and molecular electrostatic
potential energy surfaces was performed using ab initio
methods. Geometry optimization and electrostatic potential
calculations for Z51 were performed using the GAUSSIAN
program16 at the unrestricted Hartree¨CFock level using the
6-311g(3df,2p) basis set for N2 and C6H6. For the xenon
calculation the LANL2MB frozen core basis set was employed.
The criteria for convergence for these calculations
was 1026 H. For the calculations of the barrier length for the
molecular systems, the symmetry axis incorporating the
maximum number of nuclei ~along the NN bond for N2 and
through C1 and C4 for C6H6! was used for the onedimensional
electrostatic potential. The resulting potentials
are shown in Fig. 1 for the cases of the zero-range, Coulombic,
xenon, N2, and C6H6 systems. Comparison of the zerorange
and Coulomb potentials with the ab initio potentials
demonstrates that the Coulomb potential is an appropriate
model for the atomic Xe and the diatomic N2 at displacements
1.png

[ Last edited by feynman1965 on 2012-11-11 at 16:27 ]
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