Gamma coloration of mixed crystals of KCl–KBr doped with Pb2+

Z, E. Cruz; Negrón, Ana Valderrama; A, A. Ramos; B, S. Ramos; A, J. Hernández; Jaqué, F.; S, H. Murrieta

doi:10.1016/s0969-806x(01)00292-4

Cited by 13 publications

(7 citation statements)

References 2 publications

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“…As shown in previous work the color center formation, in the form of F-centers, is closely related to the TL process (Aceves et al, 1994). The fact that the F-centers as a function of composition x have been measured in KCl1−xBrx: Pb 2+ gamma irradiated samples (Cruz-Zaragoza et al, 2002) and that their TL dependence upon the composition have been quite well characterized (Cruz et al, 2001), indicates that the main electron charge carrier present in the TL phenomenon are related to the F-centers produced by irradiation. It is very likely that those electron trapped in the form of F-centers, stimulated or released by heat may become the main charge carriers that eventually recombine radiatively with an excited or ionized state of the Pb 2+ ion present in the mixed matrix.…”

Section: Discussionsupporting

confidence: 70%

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Defects generated by irradiation with gamma rays in lead doped KCl–KBr mixed single crystals

Cruz-Zaragoza

Ramos

Barboza-Flores

et al. 2004

Radiation Measurements

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Section: Discussionsupporting

confidence: 70%

“…The F-center production e ciency was larger for x = 0:98. The F-center absorption band shifted from 540 to 620 nm towards the low-energy side as the composition x increases (Cruz et al, 2001). Also, the TL properties of KCl1−xBrx: Pb 2+ exposed to radiation at high dose have been investigated recently (Cruz-Zaragoza et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Defects generated by irradiation with gamma rays in lead doped KCl–KBr mixed single crystals

Cruz-Zaragoza

Ramos

Barboza-Flores

et al. 2004

Radiation Measurements

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“…It is established now that I -ions are distributed in RbBr-RbI mixed systems not randomly but selectively and preferentially around Tl + ions. A similar effect has been observed in gamma irradiated KBr 1-x I x :TlI and KCl 1-x Br x :Pb 2+ mixed crystals at room temperature [26,27]. The broadening and shifting of the F-absorption band in the case of mixed alkali halides may be related to both the intermediate energy levels within the band gap [28] and the change in the lattice parameter.…”

Section: Introductionsupporting

confidence: 66%

Optical absorption behavior of Tl+ DOPED Rb(Br1–x I x ) system

Eswarana

Nagarajan

2011

J Appl Spectrosc

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The optical absorption behavior of Tl + doped Rb(Br 1-x I x ) mixed crystals (with x = 0.00, 0.05, and 0.10) grown under vacuum by slow cooling from the melt has been studied. Absorption spectra of the mixed crystals recorded at room temperature showed that the characteristic A-absorption band of Tl + ions in the Rb(Br 1-x I x ) system (0.1 mol. %) with x = 0.00 (i.e., RbBr:Tl + ) broadened with the iodine content towards the low energy side. Changes in the absorption spectra of the mixed crystals are due to creation of some complex centers involving Tl + , Br -, and I − ions with energy levels inside the band gap while forming the mixed crystal. The absorption spectra of gamma-irradiated mixed crystals showed the F-band, which shifted towards the low energy side due to the existence of iodine ions in the mixed crystals.

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“…The association of F-centers with the glow curve contributes with the identification of the principal irradiation pair-defect associated with the production of the main peak of the glow curve of the thermoluminescence phenomenon [6].…”

Section: Remarksmentioning

confidence: 99%

Coloration dependence in the thermoluminescence properties of the double doped NaCl single crystals under gamma irradiation

Sánchez‐Mejorada

Gelover-Santiago

Frias

2006

Phys. Status Solidi (c)

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In this work the behaviour of calcium manganese doped NaCl single crystals under gamma irradiation is reported. Various single crystals of NaCl doped with Ca and Mn have been irradiated at different doses with ionising radiation. The production of defects has been correlated to the increase in the intensity of the thermo luminescent glow curve as a function of doses. The glow curves intensity as a function of doses shows the potential use of these materials as dosimeters. Optical properties of such crystals after irradiation with gamma rays have also been studied; results have shown their potentiality as a good detector and optical store memory devices. Since the creations of colour centres by photons with energy less than the band gap energy has been detected also in ns 2 -ion doped alkali halides.

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Gamma coloration of mixed crystals of KCl–KBr doped with Pb2+

Cited by 13 publications

References 2 publications

Defects generated by irradiation with gamma rays in lead doped KCl–KBr mixed single crystals

Defects generated by irradiation with gamma rays in lead doped KCl–KBr mixed single crystals

Optical absorption behavior of Tl+ DOPED Rb(Br1–x I x ) system

Coloration dependence in the thermoluminescence properties of the double doped NaCl single crystals under gamma irradiation

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