The Institute of Physics ( IOP ) по журналам "Journal of Physics B: Atomic and Molecular Physics"
Отображаемые элементы 120 из 8952

(19721001)The differential cross sections for elastic scattering of positrons by Se and Bi are measured at 30 degrees , 40 degrees , 60 degrees and 85 degrees for energies of 100 and 200 keV, and compared with the Mott theory. Though ...

(19840114)The 1/N expansion, where N is the number of spatial dimensions, is applied to the Schrodinger equation with a Yukawa potential. The authors obtain a recurrence relation that allows them, in principle, to compute the ...

(19750421)A Zexpansion method is used to calculate the energies (including firstorder relativistic corrections) and probabilities of 1s22s2S1/21s2s2p4P5/2 and 1s22s21S01s22s2p3P2 magnetic quadrupole transitions in the lithium ...

(19700601)The total cross section for 1s2p excitation in eH collision has been calculated by the Glauber approximation. In the intermediate energy region the results are in satisfactory agreement with the experimental findings.

(19870428)Differential and total cross sections for the excitation of n=2 sublevels of hydrogen atom by positrons are presented. A consistent version of the distortedwave approximation method (in which distortion due to static and ...

(19740311)Cross sections sigma 11* for the formation of He+ (2S) metastable ions by excitation of 1040 keV He+ ions in passage through He, Ar, Kr, H2, N2 and O2 have been determined. These cross sections are strongly energy dependent ...

(19790914)Cross sections for 1s2s excitation of 225 keV hydrogen atoms in passage through H and H2 have been determined. A tungstentube furnace has been used to provide a target of highly dissociated hydrogen and fast H(2s) ...

(19840328)The modified Glauber approximation is used to investigate the 1s2s excitation of He+ by electron impact at intermediate scattering energies. Formulae of the relevant amplitudes in electronhydrogenlike ion scattering to ...

(19740601)The cross section for the collision processes H(1s)+H+(He2+) to H(3d)+H+(He2+) are evaluated using the distortion approximation of H+ energies between 10 keV to 2000 keV (or He2+ energies between 50 keV to 2000 keV). A ...

(19690101)An expression for the cross section for excitation by fast protons of hydrogen atoms to any state ns has been obtained. Numerical values for the cross section as a function of impact energy and n are exhibited in tabular form.

(19850128)Adiabatic perturbation theory is applied to the ionisation of the 1s sigma molecular orbital (MO) and extended to less adiabatic collisions by imposing an asymptotic matching with the semiclassical approximation. The ...

(19680301)The rotational analysis of three bands of the ga system of S2 has been completed. The transition is 1u1g, and the lower state is also the lower state of the system f1ua1g. Constants for the three states are as follows: ...

(19830414)The leading two terms in the 1/Z expansion of the twoelectron Bethe logarithm are calculated by the application of a new finite basis set method. The results can be expressed in the form ln epsilon (1s21S)=ln(19.77(Z0.0063)2). ...

(19780615)A Zexpansion method, in which the spinorbit and electronelectron Coulomb interactions are treated by firstorder perturbation theory, is developed for 3P101S0 intercombinationline transitions in heliumlike ions. ...

(19721201)Asymptotic expansions in the internuclear separation Rn of the dipole transition moments Q(R)=( psi (r mod R) mod r mod psi '(r mod R)) involving the electronic BornOppenheimer states of H2+ are presented. The four leading ...

(19821228)Reports a number of calculations for the 2P0 resonances in He below the 23P0 state of He. These calculations indicate that there is no 2P0 shape resonance associated with the 23S state of helium that the Feshbach resonance ...

(19810228)The spectral distribution of highenergy noncharacteristic Xrays in symmetric (Z1=Z2) ionatom collisions is investigated in the framework of a dynamical model which takes into account the effects connected with the ...

(19850614)Lines belonging to the Ne Ilike, CrXV, Fe XVII, Ni XIX, Delta n=0 transitions 2s22p53s2s2p63s, emitted around 100 AA have been identified in the TFR tokamak plasma.

(19870326)The results of an analysis of the 2s2p resonance transition of the Li atom as a result of electron impact in the Glauber and modified Glauber approximations are reported. The cross sections of the process in the energy ...

(19820214)Hylleraas method variational calculations up to 367 terms are reported for the three lowest states of neutral helium with 1D and 1F symmetry. Convergence arguments are presented to obtain new estimates of the exact ...
Отображаемые элементы 120 из 8952