Assessing the uncertainty on particle size and shape: Implications for ESR and OSL dating of quartz and feldspar grains

M. Duval; I. Campana; V. Guilarte; L. Miguens; J. Iglesias; S. Gonzalez Sierra

doi:10.1016/j.radmeas.2015.01.012

Assessing the uncertainty on particle size and shape: Implications for ESR and OSL dating of quartz and feldspar grains

M. Duval^*, I. Campana, V. Guilarte, L. Miguens, J. Iglesias, S. Gonzalez Sierra

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

Grain size and shape are two important parameters in Electron Spin Resonance (ESR) and Optically Stimulated Luminescence (OSL) dating of sediment, since they have a direct impact on several correction factors that are used for evaluating the dose rate. These parameters were evaluated by static image analysis for a wide range of quartz and feldspar grain samples. Our results indicate that there are many factors that may influence the final grain size and shape. Overall, grains are not perfect spheres, but should be rather approximated to smooth slightly elongated ellipsoids, with a width that is on average about 25% smaller than the length. For multiple grains dating, this may have an influence of a few percents on the beta dose rate evaluation, and thus even less on the total dose rate. However, in the case of single grain dating, the impact may be somewhat more significant given the large variability in size and shape between grains that may be encountered in a natural sediment. For beta micro-dosimetry purpose, it may be thus useful to better characterize the single grain that is going to be dated.

Original language	English
Pages (from-to)	116-122
Number of pages	7
Journal	Radiation Measurements
Volume	81
DOIs	https://doi.org/10.1016/j.radmeas.2015.01.012
Publication status	Published - 1 Oct 2015

Access to Document

10.1016/j.radmeas.2015.01.012

Cite this

@article{7c129db444544392b953d799c3fe5cdd,

title = "Assessing the uncertainty on particle size and shape: Implications for ESR and OSL dating of quartz and feldspar grains",

abstract = "Grain size and shape are two important parameters in Electron Spin Resonance (ESR) and Optically Stimulated Luminescence (OSL) dating of sediment, since they have a direct impact on several correction factors that are used for evaluating the dose rate. These parameters were evaluated by static image analysis for a wide range of quartz and feldspar grain samples. Our results indicate that there are many factors that may influence the final grain size and shape. Overall, grains are not perfect spheres, but should be rather approximated to smooth slightly elongated ellipsoids, with a width that is on average about 25% smaller than the length. For multiple grains dating, this may have an influence of a few percents on the beta dose rate evaluation, and thus even less on the total dose rate. However, in the case of single grain dating, the impact may be somewhat more significant given the large variability in size and shape between grains that may be encountered in a natural sediment. For beta micro-dosimetry purpose, it may be thus useful to better characterize the single grain that is going to be dated.",

keywords = "Beta dose attenuations, ESR dating, Feldspar grains, OSL dating, Quartz, Shape, Size",

author = "M. Duval and I. Campana and V. Guilarte and L. Miguens and J. Iglesias and Sierra, {S. Gonzalez}",

year = "2015",

month = oct,

day = "1",

doi = "10.1016/j.radmeas.2015.01.012",

language = "English",

volume = "81",

pages = "116--122",

journal = "Radiation Measurements",

issn = "1350-4487",

publisher = "Elsevier Ltd.",

}

TY - JOUR

T1 - Assessing the uncertainty on particle size and shape

T2 - Implications for ESR and OSL dating of quartz and feldspar grains

AU - Duval, M.

AU - Campana, I.

AU - Guilarte, V.

AU - Miguens, L.

AU - Iglesias, J.

AU - Sierra, S. Gonzalez

PY - 2015/10/1

Y1 - 2015/10/1

N2 - Grain size and shape are two important parameters in Electron Spin Resonance (ESR) and Optically Stimulated Luminescence (OSL) dating of sediment, since they have a direct impact on several correction factors that are used for evaluating the dose rate. These parameters were evaluated by static image analysis for a wide range of quartz and feldspar grain samples. Our results indicate that there are many factors that may influence the final grain size and shape. Overall, grains are not perfect spheres, but should be rather approximated to smooth slightly elongated ellipsoids, with a width that is on average about 25% smaller than the length. For multiple grains dating, this may have an influence of a few percents on the beta dose rate evaluation, and thus even less on the total dose rate. However, in the case of single grain dating, the impact may be somewhat more significant given the large variability in size and shape between grains that may be encountered in a natural sediment. For beta micro-dosimetry purpose, it may be thus useful to better characterize the single grain that is going to be dated.

AB - Grain size and shape are two important parameters in Electron Spin Resonance (ESR) and Optically Stimulated Luminescence (OSL) dating of sediment, since they have a direct impact on several correction factors that are used for evaluating the dose rate. These parameters were evaluated by static image analysis for a wide range of quartz and feldspar grain samples. Our results indicate that there are many factors that may influence the final grain size and shape. Overall, grains are not perfect spheres, but should be rather approximated to smooth slightly elongated ellipsoids, with a width that is on average about 25% smaller than the length. For multiple grains dating, this may have an influence of a few percents on the beta dose rate evaluation, and thus even less on the total dose rate. However, in the case of single grain dating, the impact may be somewhat more significant given the large variability in size and shape between grains that may be encountered in a natural sediment. For beta micro-dosimetry purpose, it may be thus useful to better characterize the single grain that is going to be dated.

KW - Beta dose attenuations

KW - ESR dating

KW - Feldspar grains

KW - OSL dating

KW - Quartz

KW - Shape

KW - Size

UR - http://www.scopus.com/inward/record.url?scp=84921795854&partnerID=8YFLogxK

U2 - 10.1016/j.radmeas.2015.01.012

DO - 10.1016/j.radmeas.2015.01.012

M3 - Article

SN - 1350-4487

VL - 81

SP - 116

EP - 122

JO - Radiation Measurements

JF - Radiation Measurements

ER -

Assessing the uncertainty on particle size and shape: Implications for ESR and OSL dating of quartz and feldspar grains

Abstract

Access to Document

Other files and links

Fingerprint

Cite this