Secondary photon spectra in radiative decay of an auto-ionized state in a strong field

Radiative decay of an auto-ionized state in a strong field is examined with consideration of degeneration of the atom's continuous spectrum states. It is shown that this degeneration affects the form of the spontaneous photon spectrum significantly.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 12, pp. 7–10, December, 1987.     

Doubly inelastic collisions with relativistic heavy ions and target recoil momentum spectroscopy

We consider relativistic collisions of heavy hydrogenlike ions with hydrogen and helium atoms in which the ion-atom interaction causes both colliding particles to change their internal states. Concentrating on the study of the longitudinal momentum spectrum of the atomic recoil ions, we discuss the role of relativistic and higher order effects, predict a surprisingly strong influence of the projectile's electron on the momentum transfer, and show that the important information about the doubly inelastic collisions could be obtained in experiment merely by measuring the recoil momentum spectrum.     

Spectra of phonons emitted under Rydberg autoionization in a resonance electromagnetic field

The spectra have been obtained of photons emitted during resonance fluorescence and Raman scattering under laser-induced Rydberg autoionization of an atom. The spectra are studied for various ratios between the problem parameters, when several autoionization states participate in their formation simultaneously to a comparable degree.V. I. Lenin Tashkent State University. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 11, pp. 3–7, November, 1993.     

Influence of direct continuum transitions on the spectrum of photoelectrons in autoionization in a strong electromagnetic field

We obtain the spectrum of photoelectrons in autoionization in a strong resonance electromagnetic field with regard to direct transitions to the continuum of an atomic system. Calculation of continuum transitions is essential for small values of the Fano parameters for corresponding transitions.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 7, pp. 49–52, July, 1991.     

Ionization of atomic vapors and helium by collision with relativistic heavy ions

We have studied collisions of atomic vapors and helium with relativistic, highly charged ions having Z v c. Formulas for the cross-sections of ionization and excitation of discrete levels of the atomic vapor and the cross-section of single and double ionization of helium atoms have been obtained. Comparisons with experimental data of the single and double ionization of helium are presented.Tashkent University. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 2, pp. 23–29, February, 1995.     

Ionization of hydrogen atom induced by relativistic particles collisions accompanied by low momentum transfer

Ionization of a hydrogen atom in soft collisions with a relativistic charged particle is considered for the cases (a) $\overset{\lower0.5em\hbox{$\overset{\lower0.5em\hbox{ Fiziki, Vol. 70, No. 3, 2000, pp. 9–12.     

Radiation field and resonant two-center dielectronic transitions in relativistic ion-atom collisions

We consider projectile-electron excitation and loss in relativistic collisions of ionic projectiles with excited atoms. We show that under certain conditions electron transitions in the ion and atom can be resonantly coupled in the collision via the radiation field. The resonance becomes possible due to the Doppler effect, has a well-defined impact energy threshold, and clearly manifests itself in the cross sections. Since the range of the ion-atom interaction in the resonance case is very long, the presence of other atoms in the target medium as well as the size of the space occupied by the medium have to be taken into account. As a result, the cross section may become dependent on the density of the target atoms and/or the target size.