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The Moments of the Hydrogen Atom by the Method of Brackets
Symmetry, integrability and geometry: methods and applications, Tome 13 (2017) Cet article a éte moissonné depuis la source Math-Net.Ru

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Expectation values of powers of the radial coordinate in arbitrary hydrogen states are given, in the quantum case, by an integral involving the associated Laguerre function. The method of brackets is used to evaluate the integral in closed-form and to produce an expression for this average value as a finite sum.
Keywords: non-relativistic hydrogen atom; method of brackets; hypergeometric function; associated Laguerre functions. 
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Ivan Gonzalez; Karen T. Kohl; Igor Kondrashuk; Victor H. Moll; Daniel Salinas. The Moments of the Hydrogen Atom by the Method of Brackets. Symmetry, integrability and geometry: methods and applications, Tome 13 (2017). http://geodesic.mathdoc.fr/item/SIGMA_2017_13_a0/

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