Geodesic
Born method in the problem of entry of a term into the continuum through a sloping boundary
Teoretičeskaâ i matematičeskaâ fizika, Tome 37 (1978) no. 1, pp. 84-101 
A. K. Kazanskii. Born method in the problem of entry of a term into the continuum through a sloping boundary. Teoretičeskaâ i matematičeskaâ fizika, Tome 37 (1978) no. 1, pp. 84-101. http://geodesic.mathdoc.fr/item/TMF_1978_37_1_a8/
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     title = {Born method in the problem of entry of a~term into the continuum through a~sloping boundary},
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Voir la notice de l'article provenant de la source Math-Net.Ru

In the framework of the quantum variant of the Demkov–0sherov model, various cases of the position of a sloping boundary of the continuum and a term of the system are considered. The problem is solved by the Born method, i.e., the principal terms of the asymptotic: behaviors of different characteristics with respect to the parameter $\sqrt{m_e/M}$ ($m_e$ is the electron mass and $M$ is the reduced mass of the atoms) are studied.

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