## Treatise on materials science and technology |

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Page 52

For the F center in alkali halides, the correct structure was first proposed by de

Boer (1937), namely a single anion vacancy with a single trapped ... It can also

be generated by optical bleaching of crystals containing F centers with

light.

For the F center in alkali halides, the correct structure was first proposed by de

Boer (1937), namely a single anion vacancy with a single trapped ... It can also

be generated by optical bleaching of crystals containing F centers with

**F band**light.

Page 54

N is the concentration of centers per cubic meter, / is the oscillator strength of the

absorption band, y\ is the refractive index at the peak of ... For allowed electric

dipole transitions, /is always near unity; it is about 0.7 for

.

N is the concentration of centers per cubic meter, / is the oscillator strength of the

absorption band, y\ is the refractive index at the peak of ... For allowed electric

dipole transitions, /is always near unity; it is about 0.7 for

**F bands**in alkali halides.

Page 57

Since there are 17 alkali halides with the NaCl structure, it is fairly easy to

determine experimentally how the position of the

parameter. Figure 6 shows that the prediction of the particle in the box model is

not too ...

Since there are 17 alkali halides with the NaCl structure, it is fairly easy to

determine experimentally how the position of the

**F band**does vary with latticeparameter. Figure 6 shows that the prediction of the particle in the box model is

not too ...

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### Contents

Introduction | 2 |

Formal Relations for Solutions | 3 |

Phase Relations | 12 |

Copyright | |

17 other sections not shown

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### Common terms and phrases

alkali halides applied stress atomic ordering behavior Burgers vector center concentration Chem color centers components configuration cross slip cyclic deformation dislocation loop disordered alloy effect elastic collisions equation equilibrium excited F amplitudes F band F centers FeCo alloy flow stress fracture fully ordered given by Eq grain high energy impurities interaction interstitial ionic irradiation lattice low temperatures luminescence magnetic Marcinkowski materials McLellan measurements mechanism nearest neighbor neutron nuclear occur optical absorption ordered alloys ordinary dislocations pair production pairs particle photochemical photoluminescence photon Phys plastic fatigue plastic strain point defects Pooley Proc produced R. G. Davies radiation damage processes recombination room temperature shown in Fig shows Sibley single crystals slip bands slip plane sodalite solid solute atoms Sonder stage Status Solidi stress-strain curves structure studies superlattice dislocation techniques temperature dependence thermal thermodynamic tion trapped twinning vacancies values yield stress