Geodesic
Quasiclassical expansion of the amplitude of potential scattering
Teoretičeskaâ i matematičeskaâ fizika, Tome 45 (1980) no. 3, pp. 390-393

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A simple method is proposed for calculating the corrections of higher orders in the expansion with respect to the quasielassical parameter of the angle-dependent amplitude of scattering on a spherically symmetric potential. The approach is based on the recently proposed representation of the complex deflection angIe for the amplitude. An explicit expression for the first-order correction is given. 
@article{TMF_1980_45_3_a8,
     author = {V. N. Ostrovskii},
     title = {Quasiclassical expansion of the amplitude of potential scattering},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {390--393},
     publisher = {mathdoc},
     volume = {45},
     number = {3},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1980_45_3_a8/}
}
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V. N. Ostrovskii. Quasiclassical expansion of the amplitude of potential scattering. Teoretičeskaâ i matematičeskaâ fizika, Tome 45 (1980) no. 3, pp. 390-393. http://geodesic.mathdoc.fr/item/TMF_1980_45_3_a8/