The coloration effect in KCl: Eu2+ crystals γ‐irradiated at 200 K

H. Opyrchal; B. Macalik; K. D. Nierzewski

doi:10.1002/crat.2170240210

The coloration effect in KCl: Eu²⁺ crystals γ‐irradiated at 200 K

H. Opyrchal, B. Macalik, K. D. Nierzewski

Research output: Contribution to journal › Article › peer-review

Abstract

The formation of colour centers at 200 K in γ‐irradiated KCl crystals doped with Eu²⁺ ions in a wide concentration range is studied by optical absorption, EPR, and ITC method. The EPR and ITC measurements reveal the drastic decrease of concentration of isolated europium dipoles induced by irradiation at 200 K. Moreover, no correlation between concentration changes of colour centers and Eu²⁺ dipoles induced by irradiation and postirradiated annealing has been found. The results obtained are explained by radiation stimulated aggregation of Eu²⁺ dipoles into small clusters at 200 K.

Original language	English (US)
Pages (from-to)	175-180
Number of pages	6
Journal	Crystal Research and Technology
Volume	24
Issue number	2
DOIs	https://doi.org/10.1002/crat.2170240210
State	Published - Feb 1989
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Chemistry
General Materials Science
Condensed Matter Physics

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title = "The coloration effect in KCl: Eu2+ crystals γ‐irradiated at 200 K",

abstract = "The formation of colour centers at 200 K in γ‐irradiated KCl crystals doped with Eu2+ ions in a wide concentration range is studied by optical absorption, EPR, and ITC method. The EPR and ITC measurements reveal the drastic decrease of concentration of isolated europium dipoles induced by irradiation at 200 K. Moreover, no correlation between concentration changes of colour centers and Eu2+ dipoles induced by irradiation and postirradiated annealing has been found. The results obtained are explained by radiation stimulated aggregation of Eu2+ dipoles into small clusters at 200 K.",

author = "H. Opyrchal and B. Macalik and Nierzewski, {K. D.}",

year = "1989",

month = feb,

doi = "10.1002/crat.2170240210",

language = "English (US)",

volume = "24",

pages = "175--180",

journal = "Crystal Research and Technology",

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TY - JOUR

T1 - The coloration effect in KCl

T2 - Eu2+ crystals γ‐irradiated at 200 K

AU - Opyrchal, H.

AU - Macalik, B.

AU - Nierzewski, K. D.

PY - 1989/2

Y1 - 1989/2

N2 - The formation of colour centers at 200 K in γ‐irradiated KCl crystals doped with Eu2+ ions in a wide concentration range is studied by optical absorption, EPR, and ITC method. The EPR and ITC measurements reveal the drastic decrease of concentration of isolated europium dipoles induced by irradiation at 200 K. Moreover, no correlation between concentration changes of colour centers and Eu2+ dipoles induced by irradiation and postirradiated annealing has been found. The results obtained are explained by radiation stimulated aggregation of Eu2+ dipoles into small clusters at 200 K.

AB - The formation of colour centers at 200 K in γ‐irradiated KCl crystals doped with Eu2+ ions in a wide concentration range is studied by optical absorption, EPR, and ITC method. The EPR and ITC measurements reveal the drastic decrease of concentration of isolated europium dipoles induced by irradiation at 200 K. Moreover, no correlation between concentration changes of colour centers and Eu2+ dipoles induced by irradiation and postirradiated annealing has been found. The results obtained are explained by radiation stimulated aggregation of Eu2+ dipoles into small clusters at 200 K.

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U2 - 10.1002/crat.2170240210

DO - 10.1002/crat.2170240210

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VL - 24

SP - 175

EP - 180

JO - Crystal Research and Technology

JF - Crystal Research and Technology

IS - 2

ER -

The coloration effect in KCl: Eu²⁺ crystals γ‐irradiated at 200 K

Abstract

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