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dc.creatorSalem, Lionelen_US
dc.date.accessioned2006-06-15T13:09:29Z
dc.date.available2006-06-15T13:09:29Z
dc.date.issued1961en_US
dc.identifier1961-K-6en_US
dc.identifier.urihttp://hdl.handle.net/1811/8109
dc.description$^{\dagger}$The research was made possible by support extended Harward University by the Office of Naval Research under ONR Contract Nom 1866, Task Order XIV.en_US
dc.descriptionAuthor Institution: Mallinckrodt Chemical Laboratory, Harvard Universityen_US
dc.description.abstractA new sum-rule is derived for certain sums of the form \[ \Sigma^{\prime}_{i}\frac{<0|A_{op}.|i>\;<i|B_{op}.|o>}{E_{i}-E_{o}} \] The result is exact and involves no approximations such as energy averages, etc. The rule is applied to the study of two cases where the Hellmann-Feynman theorem yields incorrect forces if unperturbed wave functions are used to calculate the electron density: a) the neutral atom in a uniform electric field; b) the London-van der Waals interaction of two neutral atoms.en_US
dc.format.extent64270 bytes
dc.format.mimetypeimage/jpeg
dc.language.isoEnglishen_US
dc.publisherOhio State Universityen_US
dc.titleA NEW SUM RULE AND SOME SIMPLE $APPLICATIONS^{\dagger}$en_US
dc.typearticleen_US


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