Results 221 to 230 of about 84,873 (261)

Cloud of virtual photons in the ground state of the hydrogen atom

Physical Review A, 1985
A spinless, nonrelativistic hydrogen atom coupled to an electromagnetic field is considered. The interaction is taken in the minimal-coupling form, and the ground state of the coupled system is obtained by straightforward perturbation theory. The form of the cloud of virtual photons surrounding the atom is studied through the quantum-mechanical average
, Passante, , Compagno, , Persico
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Ground-State Energy of Metallic Hydrogen. I

Physical Review, 1962
The ground-state energy of metallic hydrogen is calculated within the framework of a perturbation expansion by interpreting the perturbation series as that for two simpler systems weakly interacting, one being the electron gas system, the other that of electrons moving in the periodic potential of the lattice neutralized by a uniformly distributed ...
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Dynamics of Hydrogen Bromide Dissolution in the Ground and Excited States

Science, 2002
The dissolution of acids is one of the most fundamental solvation processes, and an important issue is the nature of the hydration complex resulting in ion pair formation. We used femtosecond pump-probe spectroscopy to show that five water molecules are necessary for complete dissolution of a hydrogen bromide molecule to form the contact ...
S M, Hurley, T E, Dermota, D P, Hydutsky, A W, Castleman   +3 more
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The ground and excited states of hydrogen sulfide, methanethiol, and hydrogen selenide

Journal of Molecular Spectroscopy, 1984
Abstract Ab initio SCF and CI investigations of the ground and excited singlet electronic states of hydrogen sulfide 1, methanethiol 2, and hydrogen selenide 3 have been carried out. The moderately large atomic basis sets are augmented by bond functions for polarization and by sets of diffuse s and p functions to enable the description of the lower ...
Arvi Rauk, Scott Collins
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Ground state of hydrogen as a zero-point-fluctuation-determined state

Physical Review D, 1987
We show here that, within the stochastic electrodynamic formulation and at the level of Bohr theory, the ground state of the hydrogen atom can be precisely defined as resulting from a dynamic equilibrium between radiation emitted due to acceleration of the electron in its ground-state orbit and radiation absorbed from zero-point fluctuations of the ...
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Determination of density of hydrogen atoms in the ground state

Vacuum, 1996
Abstract An improved electrical probe capable of measuring not only plasma density, electron temperature, and plasma potential, but also the density of neutral hydrogen atoms in the ground state is described. The probe is made of a small disc connected to a pair of thin thermo-couple wires.
M Mozetič, M Drobnič, A Pregelj, K Zupan   +3 more
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Hyperfine splitting in the ground state of hydrogen

American Journal of Physics, 1982
The hyperfine structure of atomic hydrogen is derived in a simple and self-contained way that makes the theory accessible to advanced undergraduates in a first course on quantum mechanics.
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Multiphoton Ionization of Atomic Hydrogen in the Ground State

Physical Review, 1968
The general theory of multiphoton ionization of hydrogen atoms by simultaneous absorption of several photons is discussed. In the nonrelativistic dipole approximation, the calculations lead to a recursion relationship concerning angular functions and involve radial matrix elements containing many summations over intermediate states.
Y. Gontier, M. Trahin
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Collisional quenching of metastable hydrogen by ground-state hydrogen atoms

Physica, 1971
Abstract The quenching of the 2s metastable state of hydrogen by hydrogen atom impact appears to be controlled, at low incident energies, by a single 2s-2p transition, with subsequent decay to the 1s state rather than by direct de-excitation to the ground state.
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A study of the ground electronic state of hydrogen peroxide

Journal of Molecular Spectroscopy, 1989
Abstract A quartic force field for H 2 O 2 is presented in terms of curvilinear displacement coordinates, the result of an ab initio calculation with DZP, TZ2P, and TZ2P+ f basis sets. The MP2 method was used for the quadratic part with the SCF method used for the cubic and quartic parts.
Andrew Willetts, Jeffrey F. Gaw, Nicholas C. Handy, Stuart Carter   +3 more
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