calc_CobbleDoseRate: Calculate dose rate of slices in a spherical cobble

View source: R/calc_CobbleDoseRate.R

calc_CobbleDoseRateR Documentation

Calculate dose rate of slices in a spherical cobble

Description

Calculates the dose rate profile through the cobble based on Riedesel and Autzen (2020).

Corrects the beta dose rate in the cobble for the grain size following results of Guérin et al. (2012). Sediment beta and gamma dose rates are corrected for the water content of the sediment using the correction factors of Aitken (1985). Water content in the cobble is assumed to be 0.

Usage

calc_CobbleDoseRate(input, conversion = "Guerinetal2011")

Arguments

input

data.frame (required): A table containing all relevant information for each individual layer. For the table layout see details.

conversion

Which dose rate conversion factors to use. For accepted values see BaseDataSet.ConversionFactors

Details

The input table layout

COLUMN DATA TYPE DESCRIPTION
Distance numeric distance from the surface of the cobble to the top of each rock slice in mm. The distance for each slice will be listed in this column
DistanceError numeric Error on the distance in mm
Thickness numeric Thickness of each slice in mm
TicknessError numeric uncertainty of the thickness in mm.
Mineral character 'FS' for feldspar, 'Q' for quartz, depending which mineral in the cobble is used for dating
Cobble_K numeric K nuclide content in % of the bulk cobble
Cobble_K_SE numeric error on K nuclide content in % of the bulk cobble
Cobble_Th numeric Th nuclide content in ppm of the bulk cobble
Cobble_Th_SE numeric error on Th nuclide content in ppm of the bulk cobble
Cobble_U numeric U nuclide content in ppm of the bulk cobble
CobbleU_SE numeric error on U nuclide content in ppm of the bulk cobble
GrainSize numeric average grain size in µm of the grains used for dating
Density numeric Density of the cobble. Default is 2.7 g cm^-3
CobbleDiameter numeric Diameter of the cobble in cm.
Sed_K numeric K nuclide content in % of the sediment matrix
Sed_K_SE numeric error on K nuclide content in % of the sediment matrix
Sed_Th numeric Th nuclide content in ppm of the sediment matrix
Sed_Th_SE numeric error on Th nuclide content in ppm of the sediment matrix
Sed_U numeric U nuclide content in ppm of the sediment matrix
Sed_U_SE numeric error on U nuclide content in ppm of the sediment matrix
GrainSize numeric average grain size of the sediment matrix
WaterContent numeric mean water content of the sediment matrix in %
WaterContent_SE numeric relative error on water content

Water content The water content provided by the user should be calculated according to:

(Wet_weight - Dry_weight) / Dry_weight * 100

Value

The function returns an RLum.Results object for which the first element is a matrix (DataIndividual) that gives the dose rate results for each slice for each decay chain individually, for both, the cobble dose rate and the sediment dose rate. The second element is also a matrix (DataComponent) that gives the total beta and gamma-dose rates for the cobble and the adjacent sediment for each slice of the cobble.

Function version

0.1.0

How to cite

Riedesel, S., Autzen, M., 2024. calc_CobbleDoseRate(): Calculate dose rate of slices in a spherical cobble. Function version 0.1.0. In: Kreutzer, S., Burow, C., Dietze, M., Fuchs, M.C., Schmidt, C., Fischer, M., Friedrich, J., Mercier, N., Philippe, A., Riedesel, S., Autzen, M., Mittelstrass, D., Gray, H.J., Galharret, J., 2024. Luminescence: Comprehensive Luminescence Dating Data Analysis. R package version 0.9.24. https://CRAN.R-project.org/package=Luminescence

Author(s)

Svenja Riedesel, Aberystwyth University (United Kingdom)
Martin Autzen, DTU NUTECH Center for Nuclear Technologies (Denmark) , RLum Developer Team

References

Riedesel, S., Autzen, M., 2020. Beta and gamma dose rate attenuation in rocks and sediment. Radiation Measurements 133, 106295.

See Also

convert_Concentration2DoseRate

Examples

## load example data
data("ExampleData.CobbleData", envir = environment())

## run function
calc_CobbleDoseRate(ExampleData.CobbleData)


Luminescence documentation built on June 22, 2024, 9:54 a.m.