@article {10.3844/jmssp.2007.70.76, article_type = {journal}, title = {A Priori Estimation of the Resolvent on Approximation of Born-Oppenheimer}, author = {Bouheroum-Mentri, Sabria and Benbernou, Amina}, volume = {3}, year = {2007}, month = {Jun}, pages = {70-76}, doi = {10.3844/jmssp.2007.70.76}, url = {https://thescipub.com/abstract/jmssp.2007.70.76}, abstract = {In this study, we estimate the resolvent of the two bodies Shrodinger operator perturbed by a potential of Coulombian type on Hilbert space when h tends to zero. Using the Feschbach method, we first distorted it and then reduced it to a diagonal matrix. We considered a case where two energy levels cross in the classical forbidden region. Under the assumption that the second energy level admits a non degenerate point well and virial conditions on the others levels, a good estimate of the resolvent were observed.}, journal = {Journal of Mathematics and Statistics}, publisher = {Science Publications} }