title: Optimizing a readout protocol for low dose retrospective OSL-dosimetry using household salt.
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.
authors.affiliation: Medical Radiation Physics, Department of Clinical Sciences, Malmö, Lund University, Skåne University Hospital Malmö, Malmö, Sweden. maria.christiansson@med.lu.se
authors.forename: Maria
authors.initials: M
authors.lastname: Christiansson
authors.forename: Sören
authors.initials: S
authors.lastname: Mattsson
authors.forename: Christian
authors.initials: C
authors.lastname: Bernhardsson
authors.forename: Christopher L
authors.initials: CL
authors.lastname: Rääf
mesh_terms: D008163:Luminescent Measurements / Q000379:methods*; D055620:Optical Phenomena; D011829:Radiation Dosage; D018788:Radioactive Hazard Release; D011874:Radiometry / Q000379:methods*; D012189:Retrospective Studies; D017673:Sodium Chloride, Dietary
chemical_list: D017673:Sodium Chloride, Dietary