Rotational and translational effects in collisions of electronically excited diatomic hydrides

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Molecular Physics Laboratory, SRI International, National Aeronautics and Space Administration, National Technical Information Service, distributor , Menlo Park, Calif, [Washington, D.C, Springfield, Va
Diatomic molecules., Energy transfer., Excitation., Hydrides., Molecular collisions., Quenching (Atomic physics), Vibra
StatementDavid R. Crosley.
SeriesNASA CR -- 186770., NASA contractor report -- NASA CR-186770.
ContributionsSRI International., United States. National Aeronautics and Space Administration.
The Physical Object
FormatMicroform
Pagination1 v.
ID Numbers
Open LibraryOL16132290M

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Description Rotational and translational effects in collisions of electronically excited diatomic hydrides EPUB

Rotational and translational effects in collisions of electronically excited diatomic hydrides. [David R Crosley; SRI International.; United States. National Aeronautics and Space Administration.]. Rotational and translation effects in collisions of electronically excited diatomic hydrides.

ADVERTISEMENT. Log In Register. Cart Rotational and translation effects in collisions of electronically excited diatomic hydrides. David R. Crosley. Rotational-translational relaxation effects in diatomic-gas flows V.V.

Riabov Department of Computer Science, Rivier College, Nashua, New Hampshire USA 1 Introduction The problem of deriving the nonequilibrium gas dynamic equations from the first prin-ciples of the kinetic theory of gases was studied by Ferziger and Kaper [1] in the.

Rotational energy transfer cross sections have been computed in the rigid rotor model, for the energy range – eV, using an analytic fit to Cited by: Results are presented of calculations of cross sections for scattering of electrons by diatomic molecules in specific excited vibrational-rotational states.

The calculations were made using an approximation based on a quantum theory of scattering in a system of several bodies which can be applied to calculations of direct reactions and Cited by: 2. The problem on Barnett slip of gas along a plane surface is solved within the suggested kinetic model for a diatomic gas with rotational degrees of freedom of molecules, which takes into account transitions from rotational degrees of freedom to translational and vice versa.

The Barnett slip coefficient is obtained in the form of a function dependent on the frequency of Cited by: 2. Ex- perimental studies on rotational and vibrational ener- gy transfer in molecule solid encounters are being pursued in several laboratories [2].

Also, several theo- retical investigations ofrotational-translational ener- gy exchange in such collisions were recently reported [3].Cited by: At a translational energy of kJ mol − 1, O 3 molecules with high internal energy and medium rotational excitation (angular momentum quantum number J = 31) gain energy in 60% of the collisions (but not more than kJ mol − 1), while at J = (close to the limit where the entire internal energy is rotational) only about 30% of the.

Effects of the initial vibrational and rotational energy of a diatomic molecule on reaction rates of atom-diatomic molecule reactions have been studied using classical trajectory calculations.

The reaction probabilities, cross-sections and rate constants were calculated using the three-dimensional Monte-Carlo method. Rotational Spectroscopy of Diatomic Molecules Starting from fundamental principles, this book develops a theory that analyzes the energy levels of diatomic molecules and summarizes the many experimental methods used to study the spectra of these molecules in the gaseous state.

grows monotonically with both translational and vibrational energy in the postthreshold region (at least up to Er "'" 1 e V), and that an increase in the rotational excitation of the H2 molecule at low collision energies (Er. The anisotropic charge distribution of a molecule can easily induce a rotational transition in the molecule during an electron collision.

Further, since the level spacing of the rotational states is very small, the transition can take place over a wide range of electron energies. The rotational excitation is the dominant energy-loss process for an electron in a molecular gas, when the.

Rotational and vibrational dynamics in the protonated fluorescein show only effects of molecular alignment and rotational dephasing. The time resolved rotational anisotropy of protonated fluorescein is ences between deprotonated and protonated fluorescein are ascribed to their differ-ent higher lying electronically excited states and Cited by: 5.

Classical rotational excitation probabilities for collisions of HF, HCl, and OH with three atomic species have been calculated in three dimensions using a Monte Carlo procedure. Results are presented for the rotational excitation of both rigid diatomic rotors and those coupled via a classical harmonic by: Low-energy rotational-excitation cross sections have been calculated for collisions between ground-state helium atoms and the diatomic molecules HCl, DCl, DF, and HF from model-potential surfaces.

Benhui Yang et al.: Collisional quenching of highly rotationally excited HF equations and employing the usual boundary conditions.

k j = p 2 E j=~ denotes the wave vector for the initial channel, E j is the kinetic energy for the initial channel. Ultracold collisions between two light indistinguishable diatomic molecules: Elastic and rotational energy transfer in HD+HD Article in Physical Review A 85(5) November with 27 Reads.

The applicability of asymptotic series expansions of the type introduced by Gailitis () in heavy particle scattering calculations is examined.

The convergence of the solutions, with respect to the value of the scattering coordinate is found to be greatly improved in a model problem of the rovibrational excitation of H(_2) by H(^+). The results of infinite order sudden (IOS) and. From these quantities the molecular field shift parameter, V(i) (i = Pb or Tl), in each diatomic molecule may be derived.

The results show a good comparison with experimental data. In the course of this work various other spectroscopic constants have been calculated for these two classes of compounds and in so doing the performance of. A simple model for collisional rotational excitation of diatomic molecules presented previously (in excellent agreement with experiments and computations for elec- tron-Na 2 collisions at about eV) is extended to N- atomic molecules.

Special attention is given to highly. An understanding of the collisions between micro particles is of great importance for the number of fields belonging to physics, chemistry, astrophysics, biophysics etc.

The present book, a theory for electron-atom and molecule collisions is developed using non-relativistic quantum mechanics in a systematic and lucid : S.P. Khare.

Theory of Electron Atom Collisions [G.f Drukarev] on *FREE* shipping on qualifying offers. London 1st Academic. 8vo., pp., hardcover. Fine in VG by: 2. Loreau, Zhang, and Dalgarno J. Chem.

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Phys.() cm−1 above the ground vibrational state. If the nitrogen molecules are assumed to be in thermal equilibrium, only the v = 0 state will be populated. The ground state configuration of the sodium atom.

The book can be helpful to engineers, scientists, and students interested in plasma physics, plasma chemistry, plasma engineering, and combustion, as well as in chemical physics, lasers, energy systems, and environmental control.

The book contains an extensive database on plasma kinetics and thermodynamics as well as a lot of convenient.

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Details Rotational and translational effects in collisions of electronically excited diatomic hydrides PDF

Mechanics. Table of Contents. 28 CHAPTER 3. COLLISIONS Since this equation holds for any component, the right-hand side must be constant.

Thus we conclude that lnP = a+ unknown constants in P = Aebv2 can then be found by normalization and equipartition (each degree of freedom contributes an average energy per particle 1of 2mhv x2i = 1 2T) to give P(v) =File Size: KB.

UNIT – IV Quantum mechanical treatment of translational motion of a particle, particle in one and three dimensional boxes, harmonic – oscillator, rotational motion of a particle: particle on a ring, particle on a sphere, rigid rotator and hydrogen atom. 'Quo vadis, cold molecules?'.

This was the title chosen by Doyle, Friedrich, Masnou-Seeuws and Krems, for the editorial of the special issue on cold molecules published in in the European Physical Journal D [].This is still a very appropriate question nowadays, as the research field on cold molecules (and atoms) is constantly expanding in many directions, Cited by: Rotational tunneling of small molecular groups has been the subject of considerable theoretical and experimental activity for several decades.

Much of this activity has been driven by the promise of exploiting the extreme sensitivity of quantum tunneling to interatomic potentials, but until recently, there was no straightforward means by which quantitative information about Cited by: Studies of Rotationally and Vibrationally Inelastic Collisions of NaK with Atomic Perturbers by Kara M.

Richter A Dissertation Presented to the Graduate Committee of Lehigh University in Candidacy for the Degree of Doctor of Philosophy in Physics Lehigh University August. for approximately six to seven minutes. This procedure anesthetizes the fly, while anesthetized the fly’s wings and legs are removed.

Hot wax is then used to secure the fly on a metal platform, this wax also serves to cover and prevent the movement of vestigial limbs that could remain from their previous amputation.General Physics AISM/P/COM Page 3 Centre of Mass Conceptually, the point where the whole mass of body or system can be assumed to be concentrated for simplified study of its motion is called the centre of mass.

The centre of mass of an object is the single point that moves in the same way as a point mass having mass equal to the object would move when subjected .b(i) Discuss the rotational – vibrational Raman spectrum of a diatomic molecules.

(8) (ii) Calculate the force constant for H 35 cl from the fact that its fundamental vibrational frequency is X .