File: Reference_Data.Rd

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% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/RCarb-package.R
\docType{data}
\name{Reference_Data}
\alias{Reference_Data}
\title{Reference data}
\format{\code{Reference_Data}: \link{list} \cr

\tabular{llll}{
\strong{NAME} \tab \strong{TYPE} \tab \strong{DIM} \tab \strong{DESCRIPTION}\cr
DATAek \tab	 \code{matrix} \tab 4 x 4 \tab correction factors for electrons for water and carbonate to sediment mass ratio for K\cr
DATAet \tab	 \code{matrix} \tab 4 x 4 \tab correction factors for electrons for water and carbonate to sediment mass ratio for Th \cr
DATAet230 	\tab \code{matrix} \tab 4 x 4 \tab correction factors for electrons for water and carbonate to sediment mass ratio for Th-230\cr
DATAeu 	\tab \code{matrix} \tab 4 x 4 \tab correction factors for electrons for water and carbonate to sediment mass ratio for U\cr
DATAeu234 	\tab \code{matrix} \tab 4 x 4 \tab correction factors for electrons for water and carbonate to sediment mass ratio for U-234\cr
DATAeu238 	\tab \code{matrix} \tab 4 x 4 \tab correction factors for electrons for water and carbonate to sediment mass ratio for U-238\cr
DATApk \tab	 \code{matrix} \tab 4 x 4 \tab correction factors for photons for water and carbonate to sediment mass ratio for K\cr
DATApt \tab	 \code{matrix} \tab 4 x 4 \tab correction factors for photons for water and carbonate to sediment mass ratio for T\cr
DATApt230 \tab	 \code{matrix} \tab 4 x 4 \tab correction factors for photons for water and carbonate to sediment mass ratio for Th-230\cr
DATApu \tab	 \code{matrix} \tab 4 x 4 \tab correction factors for photons for water and carbonate to sediment mass ratio for U\cr
DATApu234 \tab	 \code{matrix} \tab 4 x 4 \tab correction factors for photons for water and carbonate to sediment mass ratio for U-234\cr
DATApu238 \tab	 \code{matrix} \tab 4 x 4 \tab correction factors for photons for water and carbonate to sediment mass ratio for U-238\cr
mejdahl \tab	 \code{data.frame} \tab 36 x 4 \tab beta-dose attenuation values for quartz grains according to Mejdahl (1979)
}}
\description{
Correction factors for beta and gamma radiation used for internal calculations.
These values are used instead of the correction factors given in Aitken (1985) for the carbonate model.
}
\details{
The reference values are used internally to account for: (1) grain size depend beta-attenuation
factors (Mejdahl, 1979) and (2) to correct nuclide dependent beta and gamma radiation for water/carbonate proportions.
The latter values are given as matrix and precise values are interpolated during the modelling process.

Different values quoted for U-238 and U-234 accounts for different activity ratios. For further details
on the origin of these data we refer to Nathan & Mauz (2008) and Nathan (2010).\cr

\strong{Nuclear data origin according to Nathan & Mauz (2008)}

The gamma primary energy spectra of uranium, thorium and potassium are drawn from
Evaluated Nuclear Structure Data File (ENSDF) database at \url{http://www.nndc.bnl.gov} (2002-01-16)
and the beta primary energy spectra was derived from ENSDF end-point energies using a
Fermi beta decay model (Evans, 1955) modified by Behrens & Szybisz (1976).
For the simulations of the collisional mass stopping powers for quartz the software ESTAR
(Berger et al., 2000) was used. The mass energy-absorption coefficients for quartz were
tabulated by Hubbell & Seltzer (2004).

\emph{For further details and references please read Nathan & Mauz (2008)}
}
\section{Version}{
 0.1.0
}

\examples{

data(Reference_Data, envir = environment())
str(Reference_Data)
Reference_Data$DATAek

}
\references{
Mejdahl, V., 1979. Thermoluminescence dating: beta-dose attenuation in quartz grains. Archaeometry 21, 61-72.
\url{http://ancienttl.org/ATL_32-2_2014/ATL_32-2_Mauz_p24-32.pdf}

Nathan, R.P., Mauz, B., 2008. On the dose-rate estimate of carbonate-rich sediments for trapped charge dating.
Radiation Measurements 43, 14-25. \doi{10.1016/j.radmeas.2007.12.012}

Nathan, R.P., 2010. Numerical modelling of environmental dose rate and its application to trapped-charge dating.
DPhil thesis, St Hugh’s College, Oxford. \url{https://ora.ox.ac.uk/objects/ora:6421}\cr

\strong{Further reading}

Aitken, M.J., 1985. Thermoluminescence dating. Academic Press.

Berger, M.J., Coursey, J.S., Zucker, M.A., 2000. ESTAR, PSTAR, and
ASTAR: Computer Programs for Calculating Stopping-Power and Range
Tables for Electrons, Protons, and Helium Ions (version 1.2.2).
http://physics.nist.gov/Star (2005-08-09).
National Institute of Standards and Technology, Gaithersburg, MD.

Behrens, H., Szybisz, L., 1976. Shapes of beta spectra. Physics Data 6-1,
Zentralstelle fuer Atomkernenergie-Dokumentation (ZAED), Germany.

Evans, R.D., 1955. The Atomic Nucleus. McGraw-Hill, NY.

Hubbell, J.H., Seltzer, S.M., 2004. Tables of X-Ray Mass Attenuation Coefficients and Mass
Energy-Absorption Coefficients (version 1.4). http://physics.nist.gov/xaamdi
(2005-08-09). National Institute of Standards and Technology, Gaithersburg, MD.
}
\keyword{datasets}