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An accurate determination of three-body intermolecular forces in the helium trimer

โœ Scribed by Fu-Ming Tao


Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
324 KB
Volume
227
Category
Article
ISSN
0009-2614

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โœฆ Synopsis


Three-body nonadditive interaction energies in the helium trimer are calculated by the complete fourth-order Mlaller-Plesset perturbation theory with large basis sets including bond functions. It is shown that the three-body energy can be easily converged to the complete basis set limit only if the counterpoise procedure is properly employed. The exchange-repulsion effect dominates the contribution to the three-body energy while the correlation contribution is in accord with the Axilrod-Teller-Muto tripledipole perturbation expression.


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