WKB approximation in atomic physics

This book has evolved from lectures devoted to applications of the Wentzel - Kramers - Brillouin- (WKB or quasi-classical) approximation and of the method of 1/N -expansion for solving various problems in atomic and nuclear physics. The intent of this book is to help students and investigators in this field to extend their knowledge of these important calculation methods in quantum mechanics. Much material is contained herein that is not to be found elsewhere. WKB approximation, while constituting a fundamental area in atomic physics, has not been the focus of many books. A novel method has been adopted for the presentation of the subject matter, the material is presented as a succession of problems, followed by a detailed way of solving them. The methods introduced are then used to calculate Rydberg states in atomic systems and to evaluate potential barriers and quasistationary states. Finally, adiabatic transition and ionization of quantum systems are covered. Read more... WKB Approximation in Quantum Mechanics -- 1/N-Expansion in Quantum Mechanics -- Rydberg States of Atomic Systems -- Penetrability of Potential Barriers and Quasi-Stationary States -- Transitions and Ionization in Quantum Systems This book describes applications of the Wentzel-Kramer Brillouin- approximation and of the method of 1/N - expansion for solving various problems in atomic and nuclear physics. Presents the material as a series of problems, with detailed methods for solving