Ab initio properties and potential energy surface of the ground electronic state of BeHe2

作者: Alister J. Page , David J.D. Wilson , Ellak I. von Nagy-Felsobuki

DOI: 10.1016/J.CPLETT.2006.08.017

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摘要: Abstract UCCSD(T) and IC-MRCI methods have been employed in conjunction with large contracted basis sets for He [5s, 4p, 3d, 2f] Be [9s, 8p, 6d, 4f, 2g] to characterize the ground electronic state of BeHe 2 + . For both wave functions, set superposition errors were included, size-extensivity corrections included calculations. results are agreement predicted trends geometry, vibration frequencies potential well-depths. A 45-point energy surface was calculated using from which a (4,4) Pade analytical function constructed yielding an absolute error fit (χ2)1/2 3.88 cm−1.

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