Optimizing a readout protocol for low dose retrospective OSL-dosimetry using household salt

Health Phys. 2012 Jun;102(6):631-6. doi: 10.1097/HP.0b013e31824108f5.

Abstract

The authors' aim has been to find a single aliquot regenerative dose (SAR) protocol that accurately recovers an unknown absorbed dose in the region between 1-250 mGy in household salt. The main investigation has been conducted on a specific mine salt (>98.5% NaCl) intended for household use, using optical stimulation by blue LED (λ = 462 nm). The most accurate dose recovery for this brand of salt is found to be achieved when using Peak Signal Summing (PSS) of the OSL-decay and a preheat temperature of 200°C after the test dose. A SAR protocol for the household salt with preset values of regenerative doses (R1--R5) and a test dose (TED) of 17 mGy is also suggested here. Under laboratory conditions, the suggested protocol recovers unknown absorbed doses in this particular brand within 5% (2 SD) in the dose range between 1-250 mGy. This is a very promising result for low dose applications of household salt as a retrospective dosimeter after a nuclear or radiological event.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Luminescent Measurements / methods*
  • Optical Phenomena*
  • Radiation Dosage*
  • Radioactive Hazard Release
  • Radiometry / methods*
  • Retrospective Studies
  • Sodium Chloride, Dietary*

Substances

  • Sodium Chloride, Dietary