Premium
Kinetics of the Thermal Mutual Conversion of F and Z 2 Color Centers in KCl:Sr Crystals
Author(s) -
Wolfram G.,
Witt V.
Publication year - 1967
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.19670220130
Subject(s) - center (category theory) , kinetics , thermal , chemistry , activation energy , thermal equilibrium , analytical chemistry (journal) , molar ratio , crystallography , thermodynamics , physics , catalysis , biochemistry , chromatography , quantum mechanics
The thermal equilibrium between F and Z 2 color centers in KCl:Sr crystals is studied as a function of the Sr ++ concentration c , and the activation energies for the conversion of the centers are determined. For Sr ++ molar concentrations between 0.4 × 10 −4 and 9 × 10 −4 the equilibrium equation is [F]/[Z 2 ] = (2.6/ c ) exp (− 0.28 eV/ kT ). The activation energies for the conversions F → Z 2 and Z 2 → F are qf = 0.76 eV and qr = 1.07 eV, respectively. The results given support the Seitz, model for the Z 2 center.