Infra-Red Color Center Bands in the Alkali Halides

1949 ◽  
Vol 76 (8) ◽  
pp. 1254-1254 ◽  
Author(s):  
E. Burstein ◽  
J. J. Oberly
Keyword(s):  
Color Center ◽  
Alkali Halides ◽  
Red Color ◽  
Infra Red

Infra-red spectra and spectral shifts of CO adsorbed on evaporated alkali-halides. Part 1.—Films of sodium salts

1969 ◽  
Vol 65 (0) ◽  
pp. 2206-2214 ◽  
Author(s):  
R. Gevirzman ◽  
Y. Kozirovski ◽  
M. Folman
Keyword(s):  
Alkali Halides ◽  
Sodium Salts ◽  
Spectral Shifts ◽  
Infra Red

Proposed Excitonic Mechanism of Color-Center Formation in Alkali Halides

1966 ◽  
Vol 148 (2) ◽  
pp. 928-932 ◽  
Author(s):  
Herbert N. Hersh
Keyword(s):  
Color Center ◽  
Alkali Halides ◽  
Excitonic Mechanism

Absorption and Infra-Red Emission of Nickel and Cobalt Doped Alkali Halides

1968 ◽  
Vol 30 (1) ◽  
pp. 97-103 ◽  
Author(s):  
M. L. Reynolds ◽  
W. E. Hagston ◽  
G. F. J. Garlick
Keyword(s):  
Alkali Halides ◽  
Red Emission ◽  
Infra Red

Stable, broadly tunable cw color center lasers in Tl+-doped alkali halides

1981 ◽  
Author(s):  
W. Gellermann ◽  
F. Luty ◽  
C. R. Pollock
Keyword(s):  
Color Center ◽  
Alkali Halides

Infra-red spectra and spectral shifts of CO adsorbed on evaporated alkali-halides. Part 2.—Films of caesium salts

1971 ◽  
Vol 67 (0) ◽  
pp. 2686-2698 ◽  
Author(s):  
R. Gevirzman ◽  
Y. Kozirovski
Keyword(s):  
Alkali Halides ◽  
Spectral Shifts ◽  
Infra Red

Infra-red luminescence of metastable electron excess centers in alkali halides

1975 ◽  
Vol 16 (7) ◽  
pp. 957-959 ◽  
Author(s):  
J.M. Ortega ◽  
P. Lagarde ◽  
Y. Farge
Keyword(s):  
Alkali Halides ◽  
Infra Red ◽  
Red Luminescence

The temperature dependence of the infra-red absorption due to U centres in alkali halides

1966 ◽  
Vol 13 (126) ◽  
pp. 1113-1121
Author(s):  
J. R. Hardy
Keyword(s):  
Temperature Dependence ◽  
Alkali Halides ◽  
Infra Red

Color Center Formation by Pulse Irradiation of Alkali Halides

1963 ◽  
Vol 3 (3) ◽  
pp. 516-522 ◽  
Author(s):  
J. H. Schulman ◽  
J. W. Boag
Keyword(s):  
Color Center ◽  
Alkali Halides ◽  
Pulse Irradiation

Infra-red studies of water adsorbed on alkali halides

1958 ◽  
Vol 247 (1251) ◽  
pp. 467-468 ◽  
Keyword(s):  
Metal Ion ◽  
Relative Size ◽  
Negative Ions ◽  
Alkali Halides ◽  
Adsorbed Water ◽  
Positive Ions ◽  
Air Temperatures ◽  
Infra Red ◽  
Stretching Vibration ◽  
Straight Lines

sed disks formed from finely powdered alkali halides act as matrices of large ce area on which the infra-red spectra of thin films of adsorbed water can be eniently studied. While completely transparent to visible and infra-red radia- electron micrographs show that the disks are mosaics of tiny crystals about n diameter packed very closely together. Satisfactory disks can be made from halide formed from Na, K, Rb and Cs with Cl, Br and I and spectroscopic ies have been made on water adsorbed on all twelve of these matrices. In this it is possible to follow the effect of the variation of size and electronegativity Le crystal ions on the water bands. The spectra have been examined under high lution both at room and liquid-air temperatures. Figure 40 shows the frequency of the strongest band in the 3000 to 3500 cm -1 ion plotted as ordinate against a unitary displacement of the negative halogen as abscissa. Straight lines join the bands with a common metal ion. The band responds to a modified asymmetrical stretching vibration of the water molecule. graphs indicate that the greatest shift in frequency relative to the free lecule is produced by the lattice with the halogen of greatest electronegativity the metal ion of lowest electropositive character. This indicates that the water attached by hydrogen bonding to the negative ions. This is supported by considerations of the relative size of the ions. The positive ions, particularly tho of sodium and potassium, being smaller, tend to be buried in the structure by t negative ions and are relatively inaccessible from the outside.

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