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Household salt for retrospective dose assessments using OSL: signal integrity and its dependence on containment, sample collection, and signal readout.

Christiansson, Maria LU ; Bernhardsson, Christian LU ; Geber, Therese LU ; Mattsson, Sören LU and Rääf, Christopher LU (2014) In Radiation and Environmental Biophysics 53(3). p.559-569
Abstract
The aim of this work was to determine how a latent optically stimulated luminescence (OSL) signal in irradiated household salt is preserved under various ambient conditions, from the time of exposure to the time of signal readout. The following parameters were examined: optical fading in fluorescent light and under darkroom conditions (red light), thermal stability of the OSL signal during storage in a light-tight container, optical fading in representative container types, and sensitization effects of the OSL signal in exposed household salt. Furthermore, the influence of grain mixing within the saltshaker or salt container was studied by determining the dose gradient within typical salt packages. Finally, the signal integrity of salt... (More)
The aim of this work was to determine how a latent optically stimulated luminescence (OSL) signal in irradiated household salt is preserved under various ambient conditions, from the time of exposure to the time of signal readout. The following parameters were examined: optical fading in fluorescent light and under darkroom conditions (red light), thermal stability of the OSL signal during storage in a light-tight container, optical fading in representative container types, and sensitization effects of the OSL signal in exposed household salt. Furthermore, the influence of grain mixing within the saltshaker or salt container was studied by determining the dose gradient within typical salt packages. Finally, the signal integrity of salt irradiated under field conditions in a village in Belarus contaminated by Chernobyl fallout was investigated. The results show that the OSL signal in household salt is preserved in large cardboard box containers, but not in white plastic salt containers or in small portion bags used in, e.g., fast food restaurants. Furthermore, the continuous wave blue OSL signal in household salt does not fade significantly during storage up to 140 days. On the contrary, the signal appears to slowly increase during storage ("inverse fading"). Field tests of two different salt containers (with and without black tape to block light) located in Belarussian households confirmed that the signal is preserved in white plastic salt containers when they are covered with extra light-shielding material. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Radiation and Environmental Biophysics
volume
53
issue
3
pages
559 - 569
publisher
Springer
external identifiers
  • pmid:24811727
  • wos:000339898300009
  • scopus:84925227910
ISSN
1432-2099
DOI
10.1007/s00411-014-0544-7
language
English
LU publication?
yes
id
fade5729-79f1-4fc3-9eb8-e2e38a306f21 (old id 4455618)
alternative location
http://www.ncbi.nlm.nih.gov/pubmed/24811727?dopt=Abstract
date added to LUP
2014-06-03 21:42:21
date last changed
2017-09-17 03:22:44
@article{fade5729-79f1-4fc3-9eb8-e2e38a306f21,
  abstract     = {The aim of this work was to determine how a latent optically stimulated luminescence (OSL) signal in irradiated household salt is preserved under various ambient conditions, from the time of exposure to the time of signal readout. The following parameters were examined: optical fading in fluorescent light and under darkroom conditions (red light), thermal stability of the OSL signal during storage in a light-tight container, optical fading in representative container types, and sensitization effects of the OSL signal in exposed household salt. Furthermore, the influence of grain mixing within the saltshaker or salt container was studied by determining the dose gradient within typical salt packages. Finally, the signal integrity of salt irradiated under field conditions in a village in Belarus contaminated by Chernobyl fallout was investigated. The results show that the OSL signal in household salt is preserved in large cardboard box containers, but not in white plastic salt containers or in small portion bags used in, e.g., fast food restaurants. Furthermore, the continuous wave blue OSL signal in household salt does not fade significantly during storage up to 140 days. On the contrary, the signal appears to slowly increase during storage ("inverse fading"). Field tests of two different salt containers (with and without black tape to block light) located in Belarussian households confirmed that the signal is preserved in white plastic salt containers when they are covered with extra light-shielding material.},
  author       = {Christiansson, Maria and Bernhardsson, Christian and Geber, Therese and Mattsson, Sören and Rääf, Christopher},
  issn         = {1432-2099},
  language     = {eng},
  number       = {3},
  pages        = {559--569},
  publisher    = {Springer},
  series       = {Radiation and Environmental Biophysics},
  title        = {Household salt for retrospective dose assessments using OSL: signal integrity and its dependence on containment, sample collection, and signal readout.},
  url          = {http://dx.doi.org/10.1007/s00411-014-0544-7},
  volume       = {53},
  year         = {2014},
}