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Cation colloidal particles in alkaline-earth halides

Conference:

Abstract

The formation of calcium, strontium and barium colloids both in heavily electron irradiated samples and in additively colored crystals of CaF/sub 2/, SrF/sub 2/ and BaF/sub 2/ has been investigated. Detailed data on the temperature dependence of the efficiency of colloid formation by irradiation have been obained. The growth of metallic particles in additively colored samples containing F and M centers has been studied for different color center concentrations and annealing temperatures. The optical absorption bands due to metallic colloids have been calculated using the theory of Mie. To take account of the pressure exerted by the matrix on the metallic particles several corrections to the optical constants of the metals have been introduced. A good agreement between theoretical calculations and experimental results has been obtained. The evolution of colloids along several thermal annealing experiments has also been investigated. A diffusion-limited model has been used which accounts for the dependence of the colloid radii with the annealing time.
Authors:
Alcala, R; Orera, V M [1] 
  1. Zaragoza Univ. (Spain). Facultad da Ciencias
Publication Date:
Jan 01, 1976
Product Type:
Conference
Reference Number:
AIX-08-344755; EDB-78-033026
Resource Relation:
Journal Name: J. Phys. (Paris), Colloq.; (France); Journal Volume: 7; Conference: 2. Europhysical topical conference on lattice defects in ionic crystals, Berlin, Germany, F.R., 30 Aug - 3 Sep 1976
Subject:
36 MATERIALS SCIENCE; BARIUM FLUORIDES; COLLOIDS; PHYSICAL RADIATION EFFECTS; CALCIUM FLUORIDES; STRONTIUM FLUORIDES; ANNEALING; ELECTRON BEAMS; F CENTERS; M CENTERS; ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; BEAMS; CALCIUM COMPOUNDS; CALCIUM HALIDES; COLOR CENTERS; CRYSTAL DEFECTS; CRYSTAL STRUCTURE; DISPERSIONS; FLUORIDES; FLUORINE COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; HEAT TREATMENTS; LEPTON BEAMS; PARTICLE BEAMS; POINT DEFECTS; RADIATION EFFECTS; STRONTIUM COMPOUNDS; VACANCIES; 360605* - Materials- Radiation Effects
OSTI ID:
5312385
Country of Origin:
France
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: JPQCA
Submitting Site:
INIS
Size:
Pages: C7.520-C7.525
Announcement Date:
May 13, 2001

Conference:

Citation Formats

Alcala, R, and Orera, V M. Cation colloidal particles in alkaline-earth halides. France: N. p., 1976. Web.
Alcala, R, & Orera, V M. Cation colloidal particles in alkaline-earth halides. France.
Alcala, R, and Orera, V M. 1976. "Cation colloidal particles in alkaline-earth halides." France.
@misc{etde_5312385,
title = {Cation colloidal particles in alkaline-earth halides}
author = {Alcala, R, and Orera, V M}
abstractNote = {The formation of calcium, strontium and barium colloids both in heavily electron irradiated samples and in additively colored crystals of CaF/sub 2/, SrF/sub 2/ and BaF/sub 2/ has been investigated. Detailed data on the temperature dependence of the efficiency of colloid formation by irradiation have been obained. The growth of metallic particles in additively colored samples containing F and M centers has been studied for different color center concentrations and annealing temperatures. The optical absorption bands due to metallic colloids have been calculated using the theory of Mie. To take account of the pressure exerted by the matrix on the metallic particles several corrections to the optical constants of the metals have been introduced. A good agreement between theoretical calculations and experimental results has been obtained. The evolution of colloids along several thermal annealing experiments has also been investigated. A diffusion-limited model has been used which accounts for the dependence of the colloid radii with the annealing time.}
journal = {J. Phys. (Paris), Colloq.; (France)}
volume = {7}
place = {France}
year = {1976}
month = {Jan}
}