The polarizability of a pair of hydrogen atoms at long range |
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Authors: | AD Buckingham PH Martin RS Watts |
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Institution: | Department of Theoretical Chemistry, University of Cambridge, Cambridge, UK |
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Abstract: | The coefficients of R?6 and R?9 in the long-range expansion of the parallel and perpendicular components of the polarizability of a pair of hydrogen atoms at a separation R have been calculated. The results are A(6)6 = 2558.59. A(6)⊥ = 1268.25, A(8)6 = 90639.5 and A(8)⊥ = 22010.3 au. The values of A(6)6 and A(6)6 and A(6)| are somewhat larger than previous theoretical estimates and much larger than the classical values of 729 and 182.25 au. The terms in R?8 arise from distortion associated with the dispersion forces and from the field of the quadrupole moment induced by the field-gradient at each atom. |
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