Accession Number:

ADP011921

Title:

Excited State Absorption of the Cr(6+)O(2-) Center in Li2B4O7 Glass

Descriptive Note:

Conference proceedings

Corporate Author:

NICHOLAS COPERNICUS UNIV OF TORUN (POLAND) INST OF PHYSICS

Report Date:

2001-01-01

Pagination or Media Count:

4.0

Abstract:

We present excited state absorption ESA measurements of the CrLi2B4O7 glass CrLBO-glass along with preliminary interpretation. The most distinct feature in the ESA characteristics is connected with the presence of chromium in its hexe-dsup 0 valence states. The Cr6 ions appear to contribute in the deexcitation processes and their evidence can be seen in the ESA spectra under excitation wavelength at 308 nm. We interpret the ESA spectra detected with UV excitation in terms of transitions in the framework of Cr5O- center which forms after charge- transfer -type absorption in CrO42- group. We assume the presence of the double-electron state of the 3dsup 22psup 4 electronic configuration together with crystal field-split states of the 3dsup 12psup 5 configuration, both allow to reproduce the obtained ESA spectra.

Subject Categories:

  • Inorganic Chemistry
  • Ceramics, Refractories and Glass
  • Crystallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE