Environmental dose rate determination using a passive dosimeter: Techniques and workflow for α-Al2O3:C chips

• Autorzy: Kreutzer S. , Martin L. , Guérin G. , Tribolo Ch. , Selva P. , Mercier N.

Identyfikatory

DOI

10.1515/geochr-2015-0086

• Języki publikacji: EN

Abstrakty

EN

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).

Słowa kluczowe

EN

α-Al2O3:C; dosimetry; luminescence; R

• Wydawca: De Gruyter
• Czasopismo: Geochronometria
• Rocznik: 2018
• Tom: Vol. 45, no. 1
• Strony: 56--67
• Opis fizyczny: Bibliogr. 39 poz., rys.

Twórcy

autor

Kreutzer S.

• Institut de Recherche sur les Archéomatériaux, UMR 5060 CNRS - Université Bordeaux Montaigne, Centre de Recherche en Physique Appliquée à l'Archéologie (CRP2A), Maison de l'Archéologie, 33607 Pessac cedex, France

autor

Martin L.

• Institut de Recherche sur les Archéomatériaux, UMR 5060 CNRS - Université Bordeaux Montaigne, Centre de Recherche en Physique Appliquée à l'Archéologie (CRP2A), Maison de l'Archéologie, 33607 Pessac cedex, France

autor

Guérin G.

• Institut de Recherche sur les Archéomatériaux, UMR 5060 CNRS - Université Bordeaux Montaigne, Centre de Recherche en Physique Appliquée à l'Archéologie (CRP2A), Maison de l'Archéologie, 33607 Pessac cedex, France

autor

Tribolo Ch.

• Institut de Recherche sur les Archéomatériaux, UMR 5060 CNRS - Université Bordeaux Montaigne, Centre de Recherche en Physique Appliquée à l'Archéologie (CRP2A), Maison de l'Archéologie, 33607 Pessac cedex, France

autor

Selva P.

• Institut de Recherche sur les Archéomatériaux, UMR 5060 CNRS - Université Bordeaux Montaigne, Centre de Recherche en Physique Appliquée à l'Archéologie (CRP2A), Maison de l'Archéologie, 33607 Pessac cedex, France

autor

Mercier N.

• Institut de Recherche sur les Archéomatériaux, UMR 5060 CNRS - Université Bordeaux Montaigne, Centre de Recherche en Physique Appliquée à l'Archéologie (CRP2A), Maison de l'Archéologie, 33607 Pessac cedex, France

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).