CONTENTS -- Preface -- Session I: Calculations of Atomic and Molecular Properties -- The Transition from Mathematician to Astrophysicist M. R. Flannery -- 1. Some Distinct Landmarks -- 1.1. The Dalgarno-Lewis Method -- 1.2. Associative Detachment -- 1.3. The Arthurs-Dalgarno Method -- 1.4. The Founding of Molecular Astrophysics -- 2. The Modus Operandi -- 3. The Result of the Transition -- 4. The Beginning and End of the Transition -- References -- Calculations of Atomic and Molecular Properties G. W. F. Drake -- 1. Introduction -- 2. Dipole Response Theory: Basic Ideas -- 3. Pseudospectral Theory -- 4. Sample Pseudostate Calculation for Hydrogen -- 5. Relationship of α(ω) to Other Atomic Properties -- 6. Applications and Results -- 7. Applications to the Study of Light Halo Nuclei -- 7.1. Solution to the Nonrelativistic Schrödinger Equation -- 7.2. Finite Nuclear Mass E.ects -- 7.3. Relativistic and Quantum Electrodynamic Corrections -- 7.4. Results for Nuclear Charge Radii -- 8. Concluding Remarks -- Acknowledgments -- References -- An Elastic Approximation for Spin Flipping Transitions in Collisions of Hydrogen Atoms B. Zygelman -- 1. Introduction -- 2. Multichannel Theory -- 2.1. The Born Approximation -- 2.2. Partial Wave Analysis -- 3. Summary, Conclusion and Personal Reflections -- Acknowledgments -- References -- Matrix Element Sums Evaluated via Differential Equations in Calculations of Atomic and Molecular Properties Michael Jamieson -- 1. Introduction -- 2. The Di.erential Equation Method -- 2.1. Perturbation Theory -- 2.2. Static and Dynamic Polarizabilities -- 2.3. Sum Rules -- 3. Applications -- 3.1. Polarizabilities, Shielding and Relativistic Energies -- 3.2. Static and Time-dependent Hartree-Fock Theory -- 3.3. Predissociation -- 3.4. Rayleigh and Raman Scattering -- 3.5. Recent Calculations of Long-range Forces -- 4. Conclusion.

Acknowledgments -- References -- Linear Response Time Dependent Density Functional Theory for Dispersion Coefficients Between Atomic Pairs Xi Chu and G. C. Groenenboom -- 1. Introduction -- 2. Perturbation Theory for Dispersion Interactions -- 3. TDDFT Calculation of Dynamic Polarizabilities -- 4. Numerical Method -- 5. Exchange-Correlation Functionals -- 6. Isotropic C6 Coefficients -- Acknowledgment -- References -- Session II: Astrochemistry -- Some Thoughts on Interstellar Chemistry William Klemperer -- References -- Astrochemistry: Building on Dalgarno's Legacy Ewine F. van Dishoeck -- 1. Introduction -- 2. Diffuse Cloud Chemistry -- 2.1. Interstellar CH and Related Molecules -- 2.2. H+ 3 and the Cosmic-Ray Ionization Rate -- 3. H2 Excitation and Chemistry -- 3.1. H2 Photodissociation -- 3.2. H2 Infrared Emission -- 3.3. H2 Formation -- 3.4. HD Chemistry and [D]/[H] -- 3.5. H2 Cooling -- 4. Cold Molecular Cores -- 4.1. H2D+ and Extreme Deuteration -- 4.2. Negative Ions -- 5. Warm and Dense Molecular Clouds -- 5.1. Dense PDRs and XDRs -- 5.2. Shocks and Outflows -- 6. Chemistry in Star- and Planet-Forming Regions -- 6.1. Ices: Solid-state Astrochemistry -- 6.2. Hot Cores: Complex Molecules -- 6.3. Protoplanetary Disks and the Water Trail -- 6.4. Exo-Planetary Atmospheres -- 7. Concluding Remarks -- Acknowledgments -- References -- Atomic and Molecular Probes for Astronomical Environments Stephen H. Lepp -- 1. Introduction -- 2. Cosmic Background Radiation -- 3. Deuterated Fractionation -- 4. OH Chemistry -- 5. Supernova 1987A -- 6. Conclusion -- Acknowledgments -- References -- H- Photodetachment in Atomic Physics and Astrophysics P. C. Stancil, S. Miyake, H. R. Sadeghpour, B. M. McLaughlin, and R. C. Forrey -- 1. Introduction -- 2. H- in Astrophysics -- 2.1. Primordial Gas -- 2.2. Radiative Feedback from Primordial Objects.

3. H- in Atomic Physics -- 3.1. Non-resonant Photodetachment -- 3.2. Resonant Photodetachment -- 3.3. Oscillator Strength Sum Rules -- 3.4. Radiative Attachment -- 3.5. Stimulated Radiative Attachment -- 3.6. Other H- Destroying Processes -- 4. Summary -- Acknowledgments -- References -- Astrochemistry: An Unfinished Symphony John H. Black -- 1. Introduction -- 2. First Movement: A Testable Prediction of Astrochemistry -- 3. Spectroscopic Signatures of Processes in Shocks -- 4. Atomic and Molecular Processes in Cosmology -- 5. Perspective -- References -- Session III: Interstellar Medium and Molecular Astrophysics -- Still More Thoughts on Interstellar Chemistry Patrick Thaddeus -- How Interstellar Chemistry (and Astrochemistry More Generally) Became Useful T. W. Hartquist, S. van Loo, and S. A. E. G. Falle -- 1. Introduction (by T. W. Hartquist) -- 2. Alex's Work on Diagnostics -- 3. Others' Work on Diagnostics -- 4. Alex's Work on Chemical and Quantum Control -- 5. Others' Work on Chemical and Quantum Control -- 6. Alex's Work on Quantum Processes Relevant to Astrophysics -- 7. Others' Work on Quantum Processes Relevant to Astrophysics -- 8. Closing Remarks -- References -- Atoms, Molecules, and Radiation: From Star-Forming Regions to Quasars A. Sternberg -- 1. Introduction -- 2. Charge Transfer -- 3. Photon-Dominated Regions -- 4. Molecular Hydrogen -- 5. X-ray Dominated Regions -- Acknowledgements -- References -- Molecular Astrophysics with the Spitzer Space Telescope: Studies of Interstellar Shocks David A. Neufeld -- 1. Introduction -- 1.1. The Origin and Effects of Interstellar Shocks -- 1.2. Infrared Spectroscopy with Spitzer -- 2. Spitzer Observations of Interstellar Hydrides -- 2.1. Molecular Hydrogen -- 2.2. Hydrogen Deuteride -- 2.3. Water Vapor -- 2.4. Hydroxyl Radicals -- 3. Future Studies -- 4. Concluding Remarks -- References.

A Common Origin for Interstellar + CH and + 3 H Cesare Cecchi-Pestellini -- 1. Introduction -- 2. The Formation of H+ 3 in Diffuse Interstellar Clouds -- 3. Conclusions -- References -- Session IV: Atomic and Molecular Processes in the Solar System and Planetary Atmospheres -- Alexander Dalgarno Jane L. Fox -- References -- Atomic and Molecular Processes in the Solar System and Planetary Atmospheres: An Overview and Some Examples T. E. Cravens -- 1. Atomic and Molecular Processes in the Solar System and Contributions of Alex Dalgarno -- 2. Ion-Neutral Collisions in the Inner Coma of Comet Halley -- 3. Ion-Neutral Collisions and the Water Plume of Enceladus -- 4. Atomic and Molecular Processes in the Ionosphere of Titan -- 5. Summary -- Acknowledgments -- References -- Approach to Thermal Equilibrium in Atomic Collisions Peng Zhang and Vasili Kharchenko -- 1. Introduction -- 2. Theory and Computational Details -- 2.1. Ab Initio Calculations of the Diatomic Potential Energy Curves -- 2.2. Elastic Collision Cross Sections -- 2.3. Linear Boltzmann Equation -- 3. Results and Discussion -- 3.1. Diatomic Potential Energy Curves -- 3.2. Differential and Total Cross Sections of Elastic Collisions -- 3.3. Energy Relaxation Kinetics -- 4. Conclusions -- Acknowledgments -- Appendix -- References -- Heliospheric X-rays Induced by Charge-Exchange Collisions V. A. Kharchenko -- 1. Introduction -- 2. Charge-Exchange Mechanism of X-ray Emission -- 3. Astrophysical Sources of Charge-exchange X-rays -- 4. X-ray Diagnostics of Astrophysical Plasmas -- 5. Planetary X-ray Emission -- Acknowledgments -- References -- Session V: Ultra-cold Collisions/Long-range Interactions -- A Tribute to Alex's Leadership and Support: The Examples of Model Potentials and Cold Molecules Françoise Masnou-Seeuws -- 1. Introduction.

2. A Long Tradition of Work on Long Range Forces Flourishing into Model Potentials -- 3. Going Directly to Key Problems and Structuring an Emerging Research Field -- 3.1. Going Directly to Key Problems: The Example of Cold Collisions and Cold Molecules -- 3.2. Structuring a Research Field: The Blooming of Cold Molecules -- 4. Conclusion -- References -- Photoassociation of Ultracold Atoms R. G. Hulet -- 1. Introduction -- 2. Interactions in Ultracold Atomic Gases -- 3. Photoassociation and the Scattering Length -- 3.1. Two-photon Photoassociation -- 4. Implications of Interactions in Quantum Gases of Lithium -- 4.1. Bose-Einstein Condensation -- 4.2. Pairing of Fermions -- 5. Limits to the Rate of Association -- 5.1. Photoassociation Near a Feshbach Resonance -- 6. Summary -- Acknowledgments -- References -- Forming Ultracold Molecules Robin Côté -- 1. Introduction -- 2. My Early Days with Alex -- 3. Photoassociation: Early Results -- 4. Feshbach Optimized Photoassociation: FOPA -- 5. Saturation Effects -- 6. Conclusions -- References -- Quantum Theory of Atomic and Molecular Scattering Based on the Fully Uncoupled Space-fixed Representation R. V. Krems -- 1. Introduction -- 2. Close Coupling Scattering Theory -- 3. The Wigner-Eckart Theorem -- 4. Uncoupled Spherical Tensor Representation of ˆVAB -- 4.1. Interaction of Two Open-Shell Atoms -- 4.2. Molecule - Molecule Interaction -- 5. Recent Work Based on Uncoupled Representations -- References -- Collisions and Reactions in Ultracold Gases N. Balakrishnan -- 1. Introduction -- 2. Properties of Low Energy Scattering -- 3. Nonreactive Collisions -- 3.1. Atom-Diatom Systems -- 3.2. Molecule-Molecule Systems -- 4. Reactive Collisions -- 4.1. Barrier Reactions -- 4.2. Barrierless Reactions -- 5. Summary and Perspective -- Acknowledgments -- References -- Session VI: Undergraduate Collaborations.

The HFS of + 2 H : Electron-Nuclear Coupling of Spins and Momenta James F. Babb.