Prof Christopher Ramsey: Publications

Radiocarbon Calibration and Analysis of Stratigraphy: The OxCal Program

Radiocarbon Cambridge University Press (CUP) 37:2 (1995) 425-430

Abstract:

People usually study the chronologies of archaeological sites and geological sequences using many different kinds of evidence, taking into account calibrated radiocarbon dates, other dating methods and stratigraphic information. Many individual case studies demonstrate the value of using statistical methods to combine these different types of information. I have developed a computer program, OxCal, running under Windows 3.1 (for IBM PCs), that will perform both 14C calibration and calculate what extra information can be gained from stratigraphic evidence. The program can perform automatic wiggle matches and calculate probability distributions for samples in sequences and phases. The program is written in C++ and uses Bayesian statistics and Gibbs sampling for the calculations. The program is very easy to use, both for simple calibration and complex site analysis, and will produce graphical output from virtually any printer.

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Radiocarbon dates from the Oxford AMS system: Archaeometry Datelist 19

Archaeometry 37:1 (1995) 195-214

Authors:

REM Hedges, RA Housley, C Bronk Ramsey, GJ van Klinken

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Radiocarbon dates from the Oxford AMS system: Archaeometry Datelist 20

Archaeometry 37:2 (1995) 417-430

Authors:

REM Hedges, RA Housley, C Bronk Ramsey, GJ van Klinken

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Radiocarbon with Gas Chromatography

Radiocarbon Cambridge University Press (CUP) 37:2 (1995) 711-716

Authors:

Christopher Bronk Ramsey, REM Hedges

Abstract:

In 14C tracer studies, and when looking for modern contamination in archaeological samples, it is often necessary to measure the 14C concentration of individual chemical fractions. Gas chromatography (GC) is one method that is frequently used for separation of chemical fractions. The gas ion source at the Oxford Radiocarbon Accelerator Unit for accelerator mass spectrometry (AMS) provides the opportunity to measure fractions from a GC instrument directly. Although the first investigations are likely to be 14C tracer studies, such a GC-AMS system could find much wider application. We present results from a pilot study of the peak sensitivity, baseline stability and crosstalk of the accelerator system used in this way. We also discuss the practical considerations in developing a GC-AMS instrument for routine use.

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Carbon dioxide sputter source development at Oxford

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms Elsevier BV 92:1-4 (1994) 100-104

Authors:

C Bronk Ramsey, REM Hedges

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Prof Christopher Ramsey

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Radiocarbon Calibration and Analysis of Stratigraphy: The OxCal Program

Abstract:

Radiocarbon dates from the Oxford AMS system: Archaeometry Datelist 19

Authors:

Radiocarbon dates from the Oxford AMS system: Archaeometry Datelist 20

Authors:

Radiocarbon with Gas Chromatography

Authors:

Abstract:

Carbon dioxide sputter source development at Oxford

Authors:

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