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• W2904623914 abstract "In this work, we provide values for the quadrupole moment Θ, the hexadecapole moment Φ, the dipole polarizability α, the quadrupole polarizability C, the dipole-octopole polarizability E, the second dipole hyperpolarizability γ, and the dipole-dipole-quadrupole hyperpolarizability B for the hydrogen molecule in the ground singlet state, evaluated by finite-field configuration interaction singles and doubles (CISD) and coupled-cluster singles and doubles (CCSD) methods for 26 different H–H separations r, ranging from 0.567 a.u. to 10.0 a.u. Results obtained with various large correlation-consistent basis sets are compared at the vibrationally averaged bond length r0 in the ground state. Results over the full range of r values are presented at the CISD/d-aug-cc-pV6Z level for all of the independent components of the property tensors. In general, our values agree well with previous ab initio results of high accuracy for the ranges of H–H distances that have been treated in common. To our knowledge, for H2 in the ground state, our results are the first to be reported in the literature for Φ for r &gt; 7.0 a.u., γ and B for r &gt; 6.0 a.u., and C and E for any H–H separation outside a narrow range around the potential minimum. Quantum Monte Carlo values of Θ have been given previously for H–H distances out to 10.0 a.u., but the statistical error is relatively large for r &gt; 7.0 a.u. At the larger r values in this work, αxx and αzz show the expected functional forms, to leading order in r−1. As r increases further, Θ and Φ vanish, while α, γ, and the components of B converge to twice the isolated-atom values. Components of C and E diverge as r increases. Vibrationally averaged values of the properties are reported for all of the bound states (vibrational quantum numbers υ = 0–14) with rotational quantum numbers J = 0–3." @default.
• W2904623914 created "2018-12-22" @default.
• W2904623914 creator A5039267183 @default.
• W2904623914 creator A5053374300 @default.
• W2904623914 date "2018-12-19" @default.
• W2904623914 modified "2023-10-16" @default.
• W2904623914 title "Dependence of the multipole moments, static polarizabilities, and static hyperpolarizabilities of the hydrogen molecule on the H–H separation in the ground singlet state" @default.
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