Computational models in atomic collision studies. Appearance of gauge potentials in atomic collision physics. On the impulse approximation in atomic collision physics.
Catalog Record: Case studies in atomic collision physics | HathiTrust Digital Library
Atomic Physics from Atmospheric and Astrophysical Studies. Atomic physics. Atomic collision cascades in solids. Atomic collision calculations. Atomic Collision Processes. Presses Universitaires de France. The author has undertaken a difficult task, on the one hand to set his level of explanation suitable to undergraduate students or below, but on the other hand to explain some of the extremely sophisticated systems now in use in such a way as to satisfy the post graduate students who, one would think, are the ones who would most wish to use this book.
The results of this compromise are sometimes uneasy-those who need Chapter I cannot hope to gain much from Chapter V, and vice versa.
Case Studies Atomic Physics
Nevertheless the author has succeeded in setting down for the first time in one book much material which is scattered about in the technical literature and which if translated into the modem Lingua Franca would be appreciated by students starting Radio Astronomy in any country. Trns is the last volume of Case Studies in Atomic Collision Physics at least in the sense that the hard-backed compilation is being changed into a bimonthly journal covering all of atomic and molecular physics and called Case Studies in Atomic Physics. Each contribution to the volume is a useful but straightforward survey.
There is little evidence of the analytic dimension suggested by the words Case Studies. Three-body recombination of positive and negative ions M. Flannery ; 2. In an ideal, perfectly elastic collision, there is no net conversion of kinetic energy into other forms such as heat, noise, or potential energy. During the collision of small objects, kinetic energy is first converted to potential energy associated with a repulsive force between the particles when the particles move against this force, i. Collisions of atoms are elastic, for example Rutherford backscattering.
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Averaged across the entire sample, molecular collisions can be regarded as essentially elastic as long as Planck's law forbids black-body photons to carry away energy from the system. In the case of macroscopic bodies, perfectly elastic collisions are an ideal never fully realized, but approximated by the interactions of objects such as billiard balls. Consider particles 1 and 2 with masses m 1 , m 2 , and velocities u 1 , u 2 before collision, v 1 , v 2 after collision.
Momentum and Collisions: Problem Set
The conservation of the total momentum before and after the collision is expressed by:. Likewise, the conservation of the total kinetic energy is expressed by:. As can be expected, the solution is invariant under adding a constant to all velocities, which is like using a frame of reference with constant translational velocity. Indeed, to derive the equations, one may first change the frame of reference so that one of the known velocities is zero, determine the unknown velocities in the new frame of reference, and convert back to the original frame of reference. This is why a neutron moderator a medium which slows down fast neutrons , thereby turning them into thermal neutrons capable of sustaining a chain reaction is a material full of atoms with light nuclei which do not easily absorb neutrons: the lightest nuclei have about the same mass as a neutron.
That is, the relative velocity of one particle with respect to the other is reversed by the collision. With respect to the center of mass, both velocities are reversed by the collision: a heavy particle moves slowly toward the center of mass, and bounces back with the same low speed, and a light particle moves fast toward the center of mass, and bounces back with the same high speed.
The velocity of the center of mass does not change by the collision. According to special relativity ,. Where p denotes momentum of any particle with mass, v denotes velocity, and c is the speed of light. In the center of momentum frame where the total momentum equals zero,.
Since the total energy and momentum of the system are conserved and their rest masses do not change, it is shown that the momentum of the colliding body is decided by the rest masses of the colliding bodies, total energy and the total momentum. Relative to the center of momentum frame , the momentum of each colliding body does not change magnitude after collision, but reverses its direction of movement.
Comparing with classical mechanics, which gives accurate results dealing with macroscopic objects moving much slower than the speed of light , total momentum of the two colliding bodies is frame-dependent. Theory of Electron-Atom Collisions - Klonover, A.. Vo Ky Lan.
Lane, N. The State of the Theory - The theory of electron-molecule collisions - Lane, N. Lefebvre-Brion, H.. Decay of Feshbach Resonances - Lucchese, R. Macek, J. Anisotropy and Time-Dependence in Collision Processes - McCurdy, C. Moiseiwitsch, B. Electron and Positron Scattering - Moores, D. Morrison, M. Nesbet, R. Electronic Correlation in Electron-Atom Scattering - Variational Methods in Electron-Molecule Collisions - Norcross, D.
Oset, E.. Single-Particle Glauber Matrix Elements,28, Peterkop, R.. Rau, A. Nonstatistical Branching Ratios in Atomic Processes - Raseev, G.. Correlation Effects in Electron-Atom Scattering - Reed, M.. Methods of Modern Mathematical Physics, Vol. Rescigno, T. Recent Developments in Complex Scaling - Electron-Molecule and Photon-Molecule Collisions - Schneider, B.
Addis Ababa University Libraries catalog › Details for: Case studies in atomic collision physics.
Spruch, L.. Low Energy Electron-Molecule Scattering - Introduction to Electron-Molecule Collisions - Truhlar, D.
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Polarization Potentials for Electron Scattering - Walker, D. Walters, H. Positron Collisions - Case Studies in Atomic Collisions Physics,1, Drachman, R. Positron-Atom Collisions - Ghosh, A. Positron-Atom and Positron-Molecule Collisions - Griffith, T. Experimental Aspects of Positron Collisions in Gases - Horvath, D.. Exotic Atoms: A Bibliography — - Humberston, J.
Theoretical Aspects of Positron Collisions in Gases - Kauppila, W. Stein, T. Positron-Gas Scattering Experiments - Positronium: Review of the Theory - Stroscio, M. Biggs, F.. Hartree-Fock Compton Profiles for the Elements,16, Brown, R. Ford, A. Gavrila, M.. Photon-Atom Elastic Scattering - Hubbell, J.
Pratt, L. Kissel, P. Kane and S. Rayleigh Scattering - Physics Reports, to be published.
Rank, D. Light Scattering - Methods of Experimental Physics - Vol. Rollnik, H.. Compton Scattering - Schaupp, D.. Storm, E..