Production of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>V</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>Centers in KCl by X Rays

Christy, R. W.; Phelps, D. H.

doi:10.1103/physrev.124.1053

Cited by 46 publications

(3 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In view of this and the presence and behaviour of the OHband it is considered that this initial stage is to be associated with the formation of the U-band [24]. The "late-stage" growth discussed above is assigned as the growth of the V,-band, this interpretation being in agreement with the conclusions of Christy and co-workers [25,26].…”

Section: Behaviour Of V-centressupporting

confidence: 81%

Temperature Dependence of Defect Production in KBr and KCl (II)

Comins

1971

Physica Status Solidi (b)

View full text Add to dashboard Cite

Studies of the growth of F-centres in Harshaw KBr and KC1 during X-irradiation as a function of temperature show that the "late-stage" production rate progressively decreases as the temperature of irradiation T is increased above w 195 "K for KBr and above w 213 "K for KCl. Various mechanisms are examined to explain this effect. The results are found to be in semi-quantitative agreement with the predictions of the excitonic mechanism of defect production, but arguments are presented to show that the mechanism of suppression involving mobile vacancies makes some contribution. The V-bands formed in the range investigated (196 OK < T < 298 "K) show a continuing progressive change in shape and peak position with increasing temperature of irradiation. Their growth behaviour becomes increasingly non-proportional to F-centre growth as T increases, but nevertheless the overall "late-stage" rate decreases in a manner comparable with that found for F-centres, and provides evidence that they are of an interstitial nature. The growth of the 213 nm band shows a two-stage behaviour, the first resulting from decomposition of OHcentres to form the U-band, while the later stage is considered to be due to the formation of V,-mntres.Untersuchungen des F-Zentren-Wachstums in Harshaw-KBr-und KC1-Kristallen wiihrend Rijntgenbestrahlung bei verschiedenen Temperaturen zeigen, d a B die ,,Endstadium"-Erzeugungsrate progreasiv abnimmt, wenn die Beatrahlungstemperatur auf fiber 196 "K fiir KBr und auf fiber 213 "K fiir KCl erhoht wird. Verschiedene Vorgiinge werden untersucht, um diesen Effekt zu erkliren. Die Ergebnisse stimmen halb-quantitativ mit dem ,,Exziton-Mechanismus" fiir Defekterzeugung fiberein. Argumente werden jedoch vorgebracht, um zu zeigen, d a B der Mechanismus der Beweglichkeitsunterdrickung von Leerstellen einen Beitrag liefert. Die V-Bander, die in dem untersuchten Temperaturbereich von 195 OK < T < 298 "K gebildet werden, zeigen mit zunehmender Beatrahlungstemperatur eine kontinuierlich progressive h d e r u n g der Form und des Maximums der Kurve. Das Anwachsen dieser V-Bander wird mit wachsender Temperatur in zunehmendem MaBe nichtproportional dem F-Zentren-Wachstum. Jedoch nimmt die totale ,,Endstadium"-Rate in vergleichbarer Weise wie fiir F-Zentren ab und liefert den Beweis, daD die V-Zentren ihren Ursprung im Zwischengitter haben. Das Anwachsen der 213 nm-Bande zeigt unterschiedliches Verhalten in zwei Abschnitten. Es riihrt im ersten Abschnitt von der Aufspaltung von OH--Zentren her, wahrend fiir den zweiten Abschnitt angenommen wird, da.0 das Anwachsen durch Bildung von V,-Zentren hervorgerufen wird.

show abstract

Section: Behaviour Of V-centressupporting

confidence: 81%

Temperature Dependence of Defect Production in KBr and KCl (II)

Comins

1971

Physica Status Solidi (b)

View full text Add to dashboard Cite

show abstract

“…Indeed, Christy and Phelps [22] have reported that in C13-spectra for X-rayed KC1 crystals only one unresolved band appears at 5.77 eV, as also reported for CI 3-spectra for aqueous solutions [3].…”

Section: Br 3-and C13-molecular Ionsmentioning

confidence: 78%

Optical absorption spectra of I₃ ^- molecular ions in KI crystals and aqueous solutions

Okada

Hata

1981

Molecular Physics

View full text Add to dashboard Cite

A semiempirical molecular orbital method including spin-orbit interaction is used to study optical absorption spectra of 13-molecular ions in (KI + Is) aqueous solutions and in KI crystals coloured additively or electrolytically. The splitting of two strong absorption bands observed for these specimens is considered to be due to the spin-orbit interaction in the iodine atoms. The values of the spin-orbit coupling constants for I3-in aqueous solutions and coloured KI crystals are estimated to be 0.56 and about 0-47 eV, respectively. The oscillator strengths of the two strong bands for these specimens is also discussed.

show abstract

“…The peak of 6.7eV is attributed to OH - (Klein e al., 1968). In the spectra of the X-irradiated KCl, the peak of F-(2.2eV) band is seen and the peak of 5.8-6.0eV is attributed to V 3 -band and OH - (Christy, 1961 for NaCl and for KCl, respectively. The F-center concentration in NaCl is ten times larger than in KCl.…”

Section: Methodsmentioning

confidence: 99%

Interaction between dislocation and defects induced by X-irradiation in alkali halide crystals

Ohgaku

Migiuma

Nagahira

2011

Radiation Measurements

View full text Add to dashboard Cite

Interaction between dislocation and defect induced by X-irradiation has been investigated in NaCl and KCl single crystals by strain rate cycling tests under superimposition of ultrasonic oscillation during plastic deformation. The interaction energy between dislocation and radiation-induced defect has been obtained by fitting Barnett model to experimental results, assuming that the defect is tetragonal. The interaction energies between dislocation and defect were determined to be 0.39 and 0.87eV for NaCl and KCl, respectively. The larger interaction energy for KCl presents its larger tetragonality of defect induced by X-irradiation than NaCl.

show abstract

Production ofV3Centers in KCl by X Rays

Cited by 46 publications

References 30 publications

Temperature Dependence of Defect Production in KBr and KCl (II)

Temperature Dependence of Defect Production in KBr and KCl (II)

Optical absorption spectra of I₃ ^- molecular ions in KI crystals and aqueous solutions

Interaction between dislocation and defects induced by X-irradiation in alkali halide crystals

Contact Info

Product

Resources

About

Production ofV3Centers in KCl by X Rays

Cited by 46 publications

References 30 publications

Temperature Dependence of Defect Production in KBr and KCl (II)

Temperature Dependence of Defect Production in KBr and KCl (II)

Optical absorption spectra of I3 - molecular ions in KI crystals and aqueous solutions

Interaction between dislocation and defects induced by X-irradiation in alkali halide crystals

Contact Info

Product

Resources

About

Optical absorption spectra of I₃ ^- molecular ions in KI crystals and aqueous solutions