Investigations and Properties of PXR

Abstract

A brief historical sketch on investigations of parametric X-ray radiation (PXR) is presented. The nature of PXR is discussed. The main spectral, angular and polarization properties of the PXR are described. Some possible applications of PXR as a source of linearly polarized, quasi monochromatic, smoothly tunable X-ray beams for energies from a few keY to several hundreds of keY are noted.•

Focusing of parametric X-ray radiation

“…The natural spectral peak width of focused PXR may be of microelectronvolts range at PXR spectral peak energy of about 10 keV [23].…”

<title>Diffraction in forward direction of parametric X-ray radiation from relativistic particles of moderate energy</title>

“…Let us discuss the question: can the incident electrons of moderate energy diffract of PXR in forward direction? In this case usually 2 0 and the Ter-Mikaelian density effect does not work and PXR at reflection is well described by kinematical theory (see [10][11][12][13][14].…”

“…For comparison, one can note that the difference in frequencies at the maximum of PXR reflection (14) at moderate energy of incident electron exceeds significantly typical frequency half-width of the Darvin table , where n a number of crystallographic planes participating in the formation of PXR with attenuation of radiation in the crystal taken into account. If the crystal is thin and the number of crystallographic planes is low enough, the width of the PXR spectral peak increases and can reach and exceed the difference between Bragg and PXR frequencies.…”

“…Reviews on properties and investigation of parametric X-ray radiation (PXR) may be found e.g. in works [10][11][12][13][14] . Recently the forward diffracted PXR has been observed (see e.g.…”