Polarizational bremsstrahlung in collisions of slow atomic particles

Abstract

The polarizational bremsstrahlung problem is considered in collisions of slow atomic particles. It is demonstrated that the polarizational bremsstrahlung dominates in the region of high impact parameters and small photon frequencies over the welt-known molecular orbital X-ray emission. The contribution of the polarizational bremsstrahlung to the total radiation spectrum is significant over a wide frequency range.

Polarizational bremsstrahlung in non-relativistic collisions

“…In such processes another mechanism, known as molecular orbital radiation, becomes important (see, e.g., [123]). Nevertheless, the polarizational BrS is important in asymmetric slow collisions of atoms and ions in the region of large impact parameters [75]. The intensity of the OBrS is negligibly small due the large masses of the colliders.…”

“…We restrict ourselves to the case of 'fast' collisions, when the translational motion of the colliders can be described by plane waves. The peculiar features of the BrS formed in slow collisions, and, in particular, its relationship to the well-known molecular orbital radiation, are discussed in [75].…”

“…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].…”