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- W1995405587 abstract "Generalized x-ray scattering factors for atoms (pseudoatoms) in diatomic molecules are determined from a finite multipole expansion of the charge density about each nucleus. The Fourier–Bessel coefficients of the pseudoatom radial density functions are determined by a least squares fit to the molecular form factor. All molecular one-center averages of the form 〈g (ra) Pj(cosϑa) 〉 are correctly given by the pseudoatom superposition whenever j?J, where J is the highest order multipole included in the a pseudoatom, regardless of the highest multipole order K for the b pseudoatom. To illustrate this property, a number of relationships between moments of the molecular charge distribution and of the pseudoatom are given. In addition, a sum rule relating the molecular form factor to the expectation values 〈ra−(j+1)Pj(cosϑa) 〉 and 〈rb−(k+1)Pk(cosϑb) 〉 is derived. For H2 the theoretical, coherent x-ray scattering intensity is reproduced to about 1% for J=K=1 and to about 0.1% for J=K=2." @default.
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- W1995405587 date "1975-11-01" @default.
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- W1995405587 title "Generalized x-ray scattering factors in diatomic molecules" @default.
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- W1995405587 doi "https://doi.org/10.1063/1.431871" @default.
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