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Environmental dose rate determination using a passive dosimeter: Techniques and workflow for α-Al2O3:C chips
- Source :
- Geochronometria, Geochronometria, Sciendo, 2018, 45 (1), pp.56-67. ⟨10.1515/geochr-2015-0086⟩
- Publication Year :
- 2018
- Publisher :
- HAL CCSD, 2018.
-
Abstract
- In situ dosimetry (active, passive dosimeters) provides high accuracy by determining environmental dose rates directly in the field. Passive dosimeters, such as α-Al2O3:C, are of particular interest for sites with desired minimum disturbance (e.g., archaeological sites). Here, we present a comprehensive approach obtaining the environmental cosmic and γ-dose rate using α-Al2O3:C chips. Our procedure consists of (1) homemade field containers, (2) a homemade bleaching box, (3) a rapid measurement sequence and (4) software based on R to process the measurement results. Our validation steps include reproducibility, irradiation time correction, cross-talk evaluation and source calibration. We further simulate the effect of the container against the infinite matrix dose rate, resulting in attenuation of ca. 6%. Our measurement design uses a lexsyg SMART luminescence reader equipped with green LEDs. The irradiation is carried out under the closed β-source. The minimum dose that can be determined was estimated with ca. 10 μGy. However, we also show that for the equipment used, an irradiation time correction of ca. 2.6 s is needed and irradiation cross-talk should be taken into account. The suggested procedure is cross-checked with four reference sites at Clermont-Ferrand showing a good γ-dose rate for three out of the four sites. Finally, an application example, including needed analytical steps, is presented for dosimeters buried at the archaeological site of the Sierra de Atapuerca (Spain).
- Subjects :
- 010506 paleontology
Dosimeter
Materials science
[SHS.STAT]Humanities and Social Sciences/Methods and statistics
[SDE.IE]Environmental Sciences/Environmental Engineering
Radiochemistry
01 natural sciences
030218 nuclear medicine & medical imaging
03 medical and health sciences
0302 clinical medicine
Workflow
[SDE]Environmental Sciences
Earth and Planetary Sciences (miscellaneous)
Dosimetry
Dose rate
Luminescence
ComputingMilieux_MISCELLANEOUS
0105 earth and related environmental sciences
Subjects
Details
- Language :
- English
- ISSN :
- 17338387 and 18971695
- Database :
- OpenAIRE
- Journal :
- Geochronometria, Geochronometria, Sciendo, 2018, 45 (1), pp.56-67. ⟨10.1515/geochr-2015-0086⟩
- Accession number :
- edsair.doi.dedup.....bdea3ead033c806acf0a6a0725b21fd3
- Full Text :
- https://doi.org/10.1515/geochr-2015-0086⟩