SelectedWorks - John B. Delos

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Selected Works of John B. Delos

Professor of Physics

John B. Delos' research interests include Theoretical atomic physics, and quantum chaos.

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About John B. Delos

John B. Delos' research interests include Theoretical atomic physics, and quantum chaos.

Present	Professor of Physics, William & Mary ‐ Mathematics Department
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Physics and Quantum Physics

Articles (110)

Article

Effect of Closed Classical Orbits on Quantum Spectra: Ionization of ...

Physical Review A (1988)

M. L. Du and John B. Delos

A formula is derived for oscillations in the near-threshold absorption spectrum of an atom in a magnetic field. Three approximations ...

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Article

Atomic Electrons in Strong Magnetic Fields: Transition from Elliptical to ...

Physical Review A (1988)

John B. Delos, Stephen Knudson, Shena Sikora, Robert Leonard Waterland, et al.

The behavior of an atomic electron in a static magnetic field strong enough to correspond to the transition regime is ...

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Article

Laser-induced Collisional Detachment

Physical Review A (1988)

D. Luo, John B. Delos and S. Geltman

A theoretical study is presented of the process of photodetachment of a negative ion by sub-threshold-frequency radiation in the presence ...

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Article

Semiclassical Interpretation of Eigenvectors for Excited Atoms in External Fields

Physical Review A (1988)

Robert Leonard Waterland, M. L. Du and John B Delos

Eigenvectors for an electron in an atom in parallel electric and magnetic fields are calculated, and a semiclassical interpretation of ...

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Article

Collisions of F+ with Ne

Physical Review A (1987)

M. Hottoka, B. Roos, John B. Delos, R. Srivastava, et al.

Measurements of inelastic collisions of F+ with Ne have been made. Transitions between 3P and 1D terms of F+ are ...

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Article

High Rydberg States of an Atom in Parallel Electric and ...

Physical Review A (1987)

Robert L. Waterland, John B. Delos and M. L. Du

We have calculated the energy spectrum of a highly excited atom in parallel electric and magnetic fields. The eigenvalues were ...

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Article

Catastrophes and Stable Caustics in Bound States of Hamiltonian Systems

Journal of Chemical Physics (1987)

John B. Delos

Caustics—envelopes of families of classical trajectories, or boundaries between classically allowed and forbidden regions—correspond to singular points of a phase‐space ...

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Article

Bound State Semiclassical Wave Functions

Journal of Chemical Physics (1986)

Stephen Knudson, John B. Delos and D. W. Noid

The semiclassical theory developed by Maslov and Fedoriuk is used to calculate the wave function for a two‐dimensional bound state ...

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Article

Electron Detachment in Negative-Ion Collisions. III. Model Calculations.

Physical Review A (1986)

T. S. Wang and John B. Delos

With the use of a previously developed close-coupling theory, and simple models for the energy gap and propagator that arise ...

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Article

Probability Conservation in Theories of Collisional Ionization and Detachment

Physical Review A (1986)

M. L. Du and John B. Delos

The semiclassical local-complex-potential theory has been widely used to describe detachment and ionization in atom-atom and ion-atom collisions. However, it ...

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Article

Semiclassical Calculation of Quantum-Mechanical Wave Functions for a Two-Dimensional Scattering ...

Journal of Chemical Physics (1985)

Stephen Knudson, John B. Delos and B. Bloom

The semiclassical theory developed by Maslov and Fedoriuk is used to calculate the wave function for two‐dimensional scattering from a ...

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Article

Trajectories of an Atomic Electron in a Magnetic Field

Physical Review A (1984)

John B. Delos, Stephen Knudson and D. W. Noid

Classical trajectories of an atomic electron in a magnetic field are calculated for various values of the field strength B. ...

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Article

Construction of a Multidimensional Potential Energy Surface from an Energy ...

Journal of Chemical Physics (1984)

Robert Leonard Waterland and John B. Delos

A method for the systematic construction of a multidimensional potential energy surface from an energy spectrum is presented. We show ...

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Article

Electron Detachment in Negative-Ion Collisions. I. Time-dependent theory and Models ...

Physical Review A (1984)

T. S. Wang and John B. Delos

A theory of electron detachment in slow collisions of negative ions with atoms is developed. The theory is based on ...

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Article

Electron Detachment in Negative-Ion Collisions. II. The Dynamical Complex Potential

Physical Review A (1984)

T. S. Wang and John B. Delos

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Article

Electron Detachment for H-(D-) in Collisions with Ne

Journal of Chemical Physics (1983)

T. S. Wang and John B. Delos

Total cross sections for electron detachment in collisions of H− and D− with Ne are calculated, using a model based ...

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Article

Highly Excited States of a Hydrogen Atom in a Strong ...

Physical Review A (1983)

John B. Delos, Stephen Knudson and D. W. Knudson

Classical trajectories and semiclassical energy eigenvalues are calculated for an atomic electron in a high Rydberg state in an external ...

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Article

Quantum Theory of Slow Atomic Collisions

International Journal of Quantum Chemistry (1983)

John B. Delos

Quantum-mechanical and semiclassical theories of slow atomic collisions are reviewed, with attention to electron-translation factors and their effects.

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Article

Theory of Near-Adiabatic Collisions. III. Coupled Equations Arising from Expansions ...

Physical Review A (1981)

John B. Delos

The conventional quantum-mechanical formulation of near-adiabatic collision theory is known to have a number of defects. These defects arise because ...

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Article

Theory of Electronic Excitations in Slow Atomic Collisions

Reviews of Modern Physics (1981)

John B. Delos

This review deals with quantitative descriptions of electronic transitions in atom-atom and ion-atom collisions. In one type of description, the ...

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Article

Diabatic and Adiabatic Representations for Atomic Collision Processes

Journal of Chemical Physics (1979)

John B. Delos and W. R. Thorson

ABSTRACT A consistent general definition of diabatic representations has not previously been given, even though many practical examples of such ...

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Article

Semiclassical Calculations of Vibrational Energy Levels for Non-Separable Systems Using ...

Journal of Chemical Physics (1979)

Randall T. Swimm and John B. Delos

We present a semiclassical method of calculating vibrational energy levels for a system of nonseparable coupled oscillators. For a Hamiltonian ...

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Article

Theory of Near-Adiabatic Collisions. I. Electron-Translation-Factor Method

Physical Review A (1978)

W. R. Thorson and John B. Delos

The theory of near-adiabatic collisions is formulated in a fully quantum-mechanical form, correctly taking into account the role of electron ...

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Article

Theory of Near-Adiabatic Collisions. II. Scattering Coordinate Method

Physical Review A (1978)

W. R. Thorson and John B. Delos

A rigorously correct and fully quantum-mechanical theory of slow atomic collisions is presented, which removes the formal defects and spurious ...

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Article

Generalization of the Rosen-Zener Model of Noncrossing Interactions. I. Total ...

Physical Review A (1977)

T. R. Dinterman and John B. Delos

The formalism developed previously to study electronic transitions by the curve-crossing mechanism is used to obtain a general model for ...

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About John B. Delos

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Articles (110)