Analyse_SAR.OSLdata: Analyse SAR CW-OSL measurements.

In Luminescence: Comprehensive Luminescence Dating Data Analysis

Analyse SAR CW-OSL measurements.

Description

The function analyses SAR CW-OSL curve data and provides a summary of the measured data for every position. The output of the function is optimised for SAR OSL measurements on quartz.

Usage

Analyse_SAR.OSLdata(
  input.data,
  signal.integral,
  background.integral,
  position,
  run,
  set,
  dtype,
  keep.SEL = FALSE,
  info.measurement = "unkown measurement",
  output.plot = FALSE,
  output.plot.single = FALSE,
  cex.global = 1,
  ...
)

Arguments

input.data	Risoe.BINfileData (required): input data from a Risø BIN file, produced by the function read_BIN2R.
signal.integral	vector (required): channels used for the signal integral, e.g. signal.integral=c(1:2)
background.integral	vector (required): channels used for the background integral, e.g. background.integral=c(85:100)
position	vector (optional): reader positions that want to be analysed (e.g. position=c(1:48). Empty positions are automatically omitted. If no value is given all positions are analysed by default.
run	vector (optional): range of runs used for the analysis. If no value is given the range of the runs in the sequence is deduced from the Risoe.BINfileData object.
set	vector (optional): range of sets used for the analysis. If no value is given the range of the sets in the sequence is deduced from the Risoe.BINfileData object.
dtype	character (optional): allows to further limit the curves by their data type (DTYPE), e.g., dtype = c("Natural", "Dose") limits the curves to this two data types. By default all values are allowed. See Risoe.BINfileData for allowed data types.
keep.SEL	logical (default): option allowing to use the SEL element of the Risoe.BINfileData manually. NOTE: In this case any limitation provided by run, set and dtype are ignored!
info.measurement	character (with default): option to provide information about the measurement on the plot output (e.g. name of the BIN or BINX file).
output.plot	logical (with default): plot output (TRUE/FALSE)
output.plot.single	logical (with default): single plot output (TRUE/FALSE) to allow for plotting the results in single plot windows. Requires output.plot = TRUE.
cex.global	numeric (with default): global scaling factor.
...	further arguments that will be passed to the function calc_OSLLxTxRatio (supported: background.count.distribution, sigmab, sig0; e.g., for instrumental error) and can be used to adjust the plot. Supported" mtext, log

Details

The function works only for standard SAR protocol measurements introduced by Murray and Wintle (2000) with CW-OSL curves. For the calculation of the Lx/Tx value the function calc_OSLLxTxRatio is used.

Provided rejection criteria

⁠[recyling ratio]⁠: calculated for every repeated regeneration dose point.

⁠[recuperation]⁠: recuperation rate calculated by comparing the Lx/Tx values of the zero regeneration point with the Ln/Tn value (the Lx/Tx ratio of the natural signal). For methodological background see Aitken and Smith (1988)

⁠[IRSL/BOSL]⁠: the integrated counts (signal.integral) of an IRSL curve are compared to the integrated counts of the first regenerated dose point. It is assumed that IRSL curves got the same dose as the first regenerated dose point. Note: This is not the IR depletion ratio described by Duller (2003).

Value

A plot (optional) and list is returned containing the following elements:

LnLxTnTx	data.frame of all calculated Lx/Tx values including signal, background counts and the dose points.
RejectionCriteria	data.frame with values that might by used as rejection criteria. NA is produced if no R0 dose point exists.
SARParameters	data.frame of additional measurement parameters obtained from the BIN file, e.g. preheat or read temperature (not valid for all types of measurements).

Function version

0.2.17

How to cite

Kreutzer, S., Fuchs, M.C., 2024. Analyse_SAR.OSLdata(): Analyse SAR CW-OSL measurements.. Function version 0.2.17. 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

Note

Rejection criteria are calculated but not considered during the analysis to discard values.

The analysis of IRSL data is not directly supported. You may want to consider using the functions analyse_SAR.CWOSL or analyse_pIRIRSequence instead.

The development of this function will not be continued. We recommend to use the function analyse_SAR.CWOSL or instead.

Author(s)

Sebastian Kreutzer, Institute of Geography, Heidelberg University (Germany)
Margret C. Fuchs, HZDR, Freiberg (Germany) , RLum Developer Team

References

Aitken, M.J. and Smith, B.W., 1988. Optical dating: recuperation after bleaching. Quaternary Science Reviews 7, 387-393.

Duller, G., 2003. Distinguishing quartz and feldspar in single grain luminescence measurements. Radiation Measurements, 37 (2), 161-165.

Murray, A.S. and Wintle, A.G., 2000. Luminescence dating of quartz using an improved single-aliquot regenerative-dose protocol. Radiation Measurements 32, 57-73.

See Also

calc_OSLLxTxRatio, Risoe.BINfileData, read_BIN2R, plot_GrowthCurve

Examples

##load data
data(ExampleData.BINfileData, envir = environment())

##analyse data
output <- Analyse_SAR.OSLdata(input.data = CWOSL.SAR.Data,
                              signal.integral = c(1:5),
                              background.integral = c(900:1000),
                              position = c(1:1),
                              output.plot = TRUE)

##combine results relevant for further analysis
output.SAR <- data.frame(Dose = output$LnLxTnTx[[1]]$Dose,
                         LxTx = output$LnLxTnTx[[1]]$LxTx,
                         LxTx.Error = output$LnLxTnTx[[1]]$LxTx.Error)
output.SAR

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