Luminescence (version 0.9.21)

analyse_portableOSL: Analyse portable CW-OSL measurements

Description

The function analyses CW-OSL curve data produced by a SUERC portable OSL reader and produces a combined plot of OSL/IRSL signal intensities, OSL/IRSL depletion ratios and the IRSL/OSL ratio.

Usage

analyse_portableOSL(
  object,
  signal.integral = NULL,
  invert = FALSE,
  normalise = FALSE,
  plot = TRUE,
  ...
)

Value

Returns an S4 RLum.Results object with the following elements:

$data

.. $summary: data.frame with the results

.. $data: list with the RLum.Analysis objects

.. $args: list the input arguments

Arguments

object

RLum.Analysis (required): RLum.Analysis object produced by read_PSL2R. The input can be a list of such objects, in such case each input is treated as a separate sample and the results are merged.

signal.integral

numeric (required): A vector of two values specifying the lower and upper channel used to calculate the OSL/IRSL signal. Can be provided in form of c(1, 5) or 1:5.

invert

logical (with default): TRUE to calculate and plot the data in reverse order.

normalise

logical (with default): TRUE to normalise the OSL/IRSL signals by the mean of all corresponding data curves.

plot

logical (with default): enable/disable plot output

...

other parameters, supported are sample to provide a sample name, if the input is a list, this is set automatically.

Function version

0.0.4

Author

Christoph Burow, University of Cologne (Germany), Sebastian Kreutzer, Institute of Geography, Ruprecht-Karls-University of Heidelberg, Germany , RLum Developer Team

How to cite

Burow, C., Kreutzer, S., 2023. analyse_portableOSL(): Analyse portable CW-OSL measurements. Function version 0.0.4. 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., 2023. Luminescence: Comprehensive Luminescence Dating Data Analysis. R package version 0.9.21. https://CRAN.R-project.org/package=Luminescence

Details

This function only works with RLum.Analysis objects produced by read_PSL2R. It further assumes (or rather requires) an equal amount of OSL and IRSL curves that are pairwise combined for calculating the IRSL/OSL ratio. For calculating the depletion ratios the cumulative signal of the last n channels (same number of channels as specified by signal.integral) is divided by cumulative signal of the first n channels (signal.integral).

See Also

RLum.Analysis, RLum.Data.Curve, read_PSL2R

Examples

# (1) load example data set
data("ExampleData.portableOSL", envir = environment())

# (2) merge and plot all RLum.Analysis objects
merged <- merge_RLum(ExampleData.portableOSL)
plot_RLum(
 object = merged,
 combine = TRUE,
 records_max = 5,
 legend.pos = "outside")
merged

# (3) analyse and plot
results <- analyse_portableOSL(
  merged,
  signal.integral = 1:5,
  invert = FALSE,
  normalise = TRUE)
get_RLum(results)