The Institute of Physics ( IOP ) по журналам "Journal of Physics B: Atomic and Molecular Physics"
Отображаемые элементы 120 из 108

(19850214)First calculations of the absolute hardness parameter eta are reported for a large number of atoms in the ground electronic state using the relativistic local density functional which includes the effects due to electron ...

A classical model for multipleelectron capture in slow collisions of highly charged ions with atoms(19860928)A new version of the classical overbarrier model for multipleelectron capture in slow collisions between ions and atoms is described. This version accounts for the different ways in which an exchange of a certain number ...

(19760401)The absolute photoionization cross section of potassium is reported from the 3p ionization limit at 50 nm down to 32 nm. Measurements on the shapes of the autoionizing resonances at 65.3 and 66.2 nm are also described. ...

(19751111)The firstorder BetheGoldstone theory (BG1) is defined as the BetheGoldstone equation for the twoparticle Green's function with the oneparticle Green's function calculated in the HartreeFock approximation. It is shown ...

(19820114)The working out of an empirical expression for the cross section for production of atomic Kshell vacancies by electrons is described. The basis is a critical analysis of the existing experimental data. The ranges for which ...

(19710401)A number of bands of MgO have been observed in the region 25002800 AA in emission from a d.c. arc between magnesium electrodes in an atmosphere of oxygen at low pressure. A detailed fine structure analysis of one of the ...

(19760621)The angular correlation of autoionization electrons or of photons ejected from collisionally aligned excited atoms is calculated assuming unpolarized beam and target, and polarizationinsensitive detectors. Starting from ...

(19801214)Innershell excitation of molecular chlorine has been studied by the electron energyloss technique, at an incident electron energy of 1.5 keV and with an energy resolution of 65 meV. Excitation energies of states in the ...

(19860814)Odd Rydberg states of lithium in a uniform magnetic field have been excited from the ground state by sigma polarised light. In the recorded energy range, as the field strength increases, several adjacent diamagnetic n ...

(19680101)A simplification of the second Born approximation, in which the terms arising from coupling to the lowest N levels are evaluated exactly and those arising from coupling to all the higher levels with principal quantum numbers ...

(19760621)Approximate quantummechanical vibrational transition probabilities are calculated for a collinear collision of an atom and a diatomic molecule. The approach consists of solving the timedependent Schrodinger equation with ...

(19720401)In the HartreeFockRoothaan (HFR) formulation for molecules of the form XHN, molecular orbitals (MO) may be written as a one centre expansion (OCE) or as a poly centre expansion (PCE). The isoelectronic molecules CH4 and ...

(19710201)For two atoms whose ionization potentials are considerably different, an exact asymptotic expression for the exchange interaction is derived. This interaction is connected with the energy level shift of an excited atom, ...

(19820114)The highresolution spectrum of methyl bromide in the wavelength range 1100 to 1250 AA has been studied by using synchrotron radiation as a background source. Discrete structure due to the excitation of the 4p pi lone pair ...

(19710901)Thirty previously unclassified emission lines all broadened by autoionization, have been observed in the Hg I spectrum. Half of these have been assigned to transitions involving 5d96s27s 3D2, 3D3 and 5d106p23P2' as upper ...

(19860828)The authors report the observation of highly stripped siliconion spectra. These spectra have been obtained after excitation of a 44 MeV siliconion beam travelling through a thin carbon foil. 2p to 1s transitions have ...

(19791128)The broadening and shift constants of the K 404.4, 404.7 nm doublet and the depolarisation cross sections of the 52P level perturbed by the rare gases are studied. The broadening and shift by helium, argon, neon and xenon ...

(19861128)An intersecting beam technique has been used to study charge transfer and ionisation in collisions of protons with Al+, Ga+, In+ and Tl+ ions at centreofmass energies in the range 50597 keV. Total cross sections for the ...

(19840328)Electron capture by protons from the L and K shells of Li atoms is studied in a wide energy range 0.6400 keV (lab) using twocentre atomic orbital expansions with translational factors within the impact parameter formalism ...

(19840314)The beam attenuation method has been used to determine the total destruction cross section for H2 molecules and H2+ and H3+ ions in collision with H2 molecules. In the case of H2H2 collisions, the present results, together ...
Отображаемые элементы 120 из 108