Simple atoms are atoms consisting of no more than three particles. They are the test-bench of atomic physics and quantum mechanics. This book presents these findings, bridging the gap between textbook descriptions of these systems and the latest research.

Counterintuitive phenomena in simple atomic and molecular systems are revealed, along with their fundamental importance and practical applications. These include the advanced methods for lasing in the infra-red and microwave ranges, the improved design of X-ray lasers, and advanced methods for spectroscopic diagnostics of plasmas. The analytical solutions of simple atoms and their role in theoretical physics is also discussed. The book is aimed at graduate students and researchers in the field of atomic and molecular physics.

Key Features

• Presents a possible explanation of dark matter based on the existence of alternative hydrogen atoms

• Examines results on the shape of spectral lines of two-electron atoms and ions

• Describes the measuring nuclear shapes in atomic experiments

• Provides advanced designs of plasma-based tunable X-ray lasers

• Includes applications of spectroscopic diagnostics of plasmas