On the Diffusion Parameters of Plumbous Ions in KCl

Reisfeld, Renata; Glasner, A.; Honigbaum, A.

doi:10.1063/1.1697246

Cited by 10 publications

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References 10 publications

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“…The absorption s pectrum of KBr : T1 in polycrystalline disks and single crystals is well known [60,62] and is presented in figure 12. The concentration dependence of the absorption maximum is presented in figure 13.…”

Section: B Thallium-doped Potassium Bromide Disksmentioning

confidence: 99%

Inorganic ions in glasses and polycrystalline pellets as fluorescence standard reference materials

Reisfeld¹

1972

J. RES. NATL. BUR. STAN. SECT. A.

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The absorption and fluorescence of inorgan ic glasses and polycrystalline disks doped by heavy metal ions is discuss ed , and their use as fluoresce nce stand ard s is evaluated. The advantages of the glass standards over other media is summarized.The glass standards are divided into two groups (1) glasses doped by trivale nt rare earths such as Gd3 +, Tb3 +, Eu3 +, Sm3 +, and Tm3+ which have narrow band optical s pectra as a result of intraconfig~rational transitions, and (2) glasses and polycrystalline disks doped by ions s uch as Tl+, Pb 2 +, Ce 3 +, and Cu + whi ch have broad spectral bands since th e optical spectra originate from interconfigurationally allowed transitions. Optical and physical parameters , including matrix effects, quantum efficiencies, decay characteristics, Stokes' shifts and spin-orbit versus orbit-lattice interaction s due to the different trans itions wi ll be discussed.Group (1) glasses are suitable for use as standards where a narrow well-defined fluorescence range is required, and group (2) glasses are suitable for use as standards whenever a substance with a wide range of fluorescen ce is measured. Special em phasis will be placed on energy transfer between donor and acceptor ions.

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Section: B Thallium-doped Potassium Bromide Disksmentioning

confidence: 99%

Inorganic ions in glasses and polycrystalline pellets as fluorescence standard reference materials

Reisfeld¹

1972

J. RES. NATL. BUR. STAN. SECT. A.

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Studies on the Purification of Kcl.: II. Spectrophotometric Determination of Magnesium and Aluminium in A. R. Alkali Halides

Glasner

1965

Israel Journal of Chemistry

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Methods for the determination of magnesium and aluminium, present as impurities, in A.R. alkali halides have been developed. Both ions were separated by co‐precipitation in the form of their hydroxides, and improved spectrophotometric methods were used for their quantitative analysis. These and other methods have been used to follow the purification of KCl by re‐crystallization from aqueous solutions, and some illustrative observations are reported.

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The Diffusion of Divalent Europium into Single Crystals of Potassium Chloride

Reisfeld

Honigbaum

1968

Israel Journal of Chemistry

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A8STRACTThe diffusion of europium was studied in single crystals of potassium chloride by the spectrophotometric method. Measurements were carried out in the temperature range 418-550·C. The absorption spectra as welJ as the fluorescence spectra of crystals showed that europium diffused in its divalent state, being reduced by the crystal field of potassium chloride. The diffusion of europium can be represented by the equation D = 6.45' 10-zexp(-29,400/RT). It is concluded that the activation energy consists of the sum of the jump energy of EUZ+ and of the enthalpy of solution of EUCIz in KC!.

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On the Diffusion Parameters of Plumbous Ions in KCl

Cited by 10 publications

References 10 publications

Inorganic ions in glasses and polycrystalline pellets as fluorescence standard reference materials

Inorganic ions in glasses and polycrystalline pellets as fluorescence standard reference materials

Studies on the Purification of Kcl.: II. Spectrophotometric Determination of Magnesium and Aluminium in A. R. Alkali Halides

The Diffusion of Divalent Europium into Single Crystals of Potassium Chloride

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