ELECTRON-NUCLEAR DOUBLE RESONANCE SPECTRUM OF AN F-CENTER ELECTRON IN ALKALI HALIDES (WITH NaCl STRUCTURE)
From the de Boer model of the F center, a spin Hamiltonian describes the hyperfine interaction of the F-center electron with an arbitrary nucleus in the lattice. This Hamiltonian is used to construct a spin Hamiltonian describing the hyperfine interaction of the F electron with all nuclei in the lattice in the presence of a constant and uniform magnetic field. The electron-nuclear double resonance spectrum for the F electron is deduced. The negativeion vacancy (in a cubic lattice) is an inversion center, and the magnetic field is a pseudovector. Consequently, nuclei at sites which are mapped into each other by an inversion. in the vacancy are physically equivalent. This entire electron-nuclear double resonance spectrum may be viewed as a set of spectra, each associated with the interaction of the F electron with a particular pair of physically equivalent nuclei. This contrasts with theory assuming that the F electron interacts with individual nuclei. The new theory leads improved agreement between calculated and observed spectra. The calculated spectrum is sensitive to the relative sign of the nuclear g factor and the electric quadrupole coupling constant. Data can be used to determine the magnitude and the sign of the electric-field gradient at lattice sites close to the F center. (auth)
- Research Organization:
- Univ. of Illinois, Urbana
- NSA Number:
- NSA-16-024317
- OSTI ID:
- 4820175
- Journal Information:
- Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Vol. Vol: 126; Other Information: Orig. Receipt Date: 31-DEC-62
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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