No abstract available

[en] An atomic beam is excited by laser radiation to a state with large principal quantum number. The beam is irradiated with infrared or millimeter wave radiation which is to be detected. The atoms absorb the radiation by making transitions to higherlying states. The transitions are sensed by applying an electric field which ionizes atoms in the final state, but not the initial state. The ions ae collected and detected by conventional pulsecounting or direct current methods

[en] The properties of Rydberg atoms in electric and magnetic fields have been considerd. Stark effect in Rydberg atoms has been studied. Diagram of energy-level shifts of H and He atoms that has been obtained in the course of experiments is close to the one calculated with the quantum mechanics techniques. The Rydberg atom is shown to be an ideal system for studying the tunnel effect. The stark effect structure analysis, has shown that overlapping the levels of Rydberg atoms may be explained by a certain specific symmetry. Thus, the presence of such a symmetry allows one to assume that the atomic electron motion in a external magnetic field obeys a certain regularity, yet unknown

[en] Highly excited atoms are often called Rydberg atoms. These atoms have a wealth of exotic properties which are discussed. Of special interest, are the effects of electric and magnetic fields on Rydberg atoms. Ordinary atoms are scarcely affected by an applied electric or magnetic field; Rydberg atoms can be strongly distorted and even pulled apart by a relatively weak electric field, and they can be squeezed into unexpected shapes by a magnetic field. Studies of the structure of Rydberg atoms in electric and magnetic fields have revealed dramatic atomic phenomena that had not been observed before

No abstract available

[en] If a single valence electron of any atom is promoted to a state of high principal quantum number n, the electron experiences an essentially Coulombic potential and behaves in many respects like a highly excited electron in hydrogen. An atom in such a state is known as a Rydberg atom. How this title originated does not seem to be known, but presumably the term is associated with the fact that the spectra of many single-electron atoms are accurately described by Rydberg's hydrogen-like formula. How large n must be for an atom to qualify as a Rydberg atom is vague, but a reasonable working definition is n > 10. Bohr's correspondence principle requires that states with increasingly high quantum numbers assume increasingly classical properties, which might be taken to imply that Rydberg atom research essentially represents a regression from the quantum world to the well-trod world of classical dynamics. However, Rydberg atom research provides a means for changing the scale of atomic interactions by many orders of magnitude, and whenever such a change of scale occurs in physics one can look forward to new discoveries and unexpected phenomena. These introductory lectures summarize some of the discoveries and surprises that have emerged from Rydberg atom research since its modern phase began slightly over ten years ago. 14 references, 14 figures, 1 table

[en] The author touches on a few topics of recent interest in the area of atomic and molecular physics research. He begins by noting that this old field is working on very new and exciting problems today, almost all of which would not even by found in subject surveys of only three years ago. He discusses work in cavily quantum electrodynamics, the manipulation of atoms with light, chaos and quantum mechanics, and advances in trapped ion research. In the last area, work has varied from precision experiments on single trapped ions, to collective effects in small numbers of trapped ions, to plasma behavior for even larger ion densities. Traps have even been able to capture anti-protons

[en] Recent experimental advances in the study of highly-excited atoms and molecules are reviewed. Rydberg states of krypton, rate constants for electron attachment to SF₆, cross sections for angular momentum changing collisions of nd states of sodium in various rare gases, Stark effect level diagrams for sodium, and ionization curves for cesium, hydrogen, and sodium are shown. 27 references

[en] A new measurement has been made of the proton magnetic moment in a spherical sample of water. The result is obtained to an estimated 10 ppb using an NMR technique

[en] The creation of spin-polarized atomic hydrogen (H) points the way to improved methods for producing polarized proton sources and targets. The systematics of H are reviewed and applications are outlined for an intense H^- source, a polarized atomic jet, and gaseous and solid targets. A technique is proposed for producing solid polarized deuterium for use in a fusion reactor plasma, or as a polarized target. 24 references, 9 figures