Temperature dependence of crossluminescence characteristics in CsCl and CsBr in the 20–300 K range

Abstract

Crossluminescence characteristics of CsCl and CsBr crystals were studied in the temperature range 20–300 K under excitation by synchrotron radiation with photon energies 13–20 eV. Temperature dependences of parameters of high-energy bands in crossluminescence spectra of both crystals show sharp changes at temperature T < 100 K. Data are analyzed on the basis of the hypothesis of coexistence in the crystal of different states of core hole separated by an activation barrier.

Key Words:

• crossluminescence
• temperature dependence
• core hole
• activation barrier
• synchrotron radiation.