New method for the polarizational bremsstrahlung calculation

Abstract

A new algorithm is introduced for the calculation of the polarizational bremsstrahlung cross section. This method is particularly efficient for carrying out the slowly converging partial-wave series, which characterize the cross section of the process. The frequency and the angular distributions of photons emitted in a collision of a 0.2-10 keV electron with Eu are calculated for the photon frequencies above the 4d-threshold: omega =100-200 eV. The polarizational bremsstrahlung is taken into account.

The role of target polarization in electron–ion recombination

“…To understand the enhancement of σ tot over σ RR in non-resonant energy regions qualitatively, one can use arguments similar to those developed in the theory of polarizational bremsstrahlung, where the analogous effect , Amusia et al 1985, Korol 1992, Korol et al 2002 is known as the 'stripping' phenomenon (Amusia et al 1985).…”

Bremsstrahlung spectra produced by kilovolt electron impact on thick targets

“…The first awareness of PB probably [6] came from Amusia's 1982 paper [7], and much of the work on it was summarized by Tystovich and Oiringel [8]. In the past years, Korol and Solov'yov have developed new calculation methods for PB and enabled comparisons between experiment and theory [9][10][11]. Recently evidence for the PB contribution to the photon spectrum from freeatom targets has been demonstrated [12].…”

Polarizational bremsstrahlung in non-relativistic collisions

“…The PBrS amplitude can be expressed in terms of the generalized dynamic polarizability α(ω, q). Omitting the details (see [60]) we present the result:…”

“…A general approach to consider the BrS process (both the ordinary and the polarizational) in collisions with many-electron targets is based on a consistent application of quantum mechanics and quantum many-body theory. The main results obtained by using this approach include: (a) application of the many-body theory for accurate calculations of the dynamic generalized polarizability of the target [60][61][62][63][64] (b) development of the methods for approximate treatment of of the dynamic response of the target [65][66][67][68][69][70], (c) calculation of the total BrS spectra of in collisions of nonrelativistic electrons on many-electron atoms over wide range of emitted photon energies including the regions of giant resonances [71][72][73][74], (d) theoretical description of the PBrS in collisions of slow atomic particles and in collisions involving atoms in the excited states [75][76][77], (e) numerical calculations of inelastic BrS [78,79], (f) theoretical and numerical description of the BrS process in electron-cluster collisions [80][81][82][83][84], (g) the full relativistic description of the BrS in a charged particle-atom collision [85][86][87].…”