EPR of a New O       2    −     Centre in KCl | Zendy

Callens R. | Zendy; Callens F. | Zendy; Matthys P. | Zendy; Boesman E. | Zendy

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EPR of a New O 2 − Centre in KCl

Author(s) -

Callens R.,

Callens F.,

Matthys P.,

Boesman E.

Publication year - 1988

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.2221480227

Subject(s) - electron paramagnetic resonance , orthorhombic crystal system , impurity , principal axis theorem , ion , doping , materials science , spectral line , crystallography , tilt (camera) , chemistry , nuclear magnetic resonance , crystal structure , physics , geometry , mathematics , optoelectronics , organic chemistry , astronomy

EPR results are given of a new O 2 − paramagnetic defect, formed following room temperature X‐ray irradiation in KCl, heavily doped in the melt with KNO 2 . The EPR spectra indicate that the O 2 − molecular ion has two equivalent equilibrium positions between which it jumps. Above 10 K the EPR spectrum of this molecular ion is orthorhombic, with principal axes [110], [001], and [1 1 0]. Below this transition temperature the principal axes are tilted by 1° with respect to the [110] and [1 1 0] directions in the (110) plane. A possible model for the perturbing impurity responsible for this tilt is proposed.

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