The Role of Core Levels in Scintillation Processes

Abstract

The Auger decay of a core hole results in appearance of several strongly correlated excitations. This excited region strongly polarizes the lattice and thus the defect creation is possible. In all cases the core hole causes the strong local perturbation of electronic and lattice subsystems. The creation of such excited region with mutual relaxation of correlated electrons and holes can result in the increase of the efficiency of energy transfer to activators, acceleration of the luminescence kinetics, and the appearance of radiation-induced luminescence centers.

Ultraviolet luminescence of CsI and CsCl excited by soft x-ray laser

“…This is the case of ionic crystals such as CsI and CsCl, whose photoexcitation spectra exhibit a strong luminescence increase in the region of the iodine 4d electrons and of the chlorine 5 p electrons, respectively. 5,6 Apart from their practical interest as fast scintillators, these crystals are good samples for investigating the role of Auger processes in luminescence mechanisms since CsCl is known as an ''Auger-free'' luminescent crystal 7 whereas the decay of core holes is dominated by Auger processes in CsI. 8…”

Temperature dependent energy transfer to Eu3+ emission centres in K5Eu(MoO4)4 crystals

“…A number of excitations (e-h pairs) is created in a local volume in such process, especially in the latter case, since the relaxation of core holes is not accompanied by their migration through the crystal. 42 Thus, excitons created at relatively high densities at neighbouring MoO 4…”

“…A number of excitations (e–h pairs) is created in a local volume in such process, especially in the latter case, since the relaxation of core holes is not accompanied by their migration through the crystal. 42 Thus, excitons created at relatively high densities at neighbouring MoO 4 2− oxyanions are supposed to preferentially populate 5 D 1 terms due to resonant energy transfer with consequent increase of emission intensity from these states.…”

Guardians of the Constitution: Constitutional Court Presidents and the Struggle for the Rule of Law in Post-Soviet Europe

“…353 For his part, Zorkin was briefly hospitalized as his colleagues demanded his departure. 354 On Wednesday, October 6, Zorkin resigned his position as President of the Constitutional Court.…”