J S Vogel

Biographic Data

ID5597120
NAMEJ S Vogel
GIVEN NAMESJ S
FAMILY NAMEVogel
SIGNATUREVOGEL J S
VERIFIEDNo
TOTAL WORKS11
TOTAL CITATIONS425
WORKS AS AUTHOR11
WORKS AS EDITOR0
FIRST PUBLICATION YEAR1983
LATEST PUBLICATION YEAR1992
H-INDEX6

  • Progress in AMS Measurements at the LLNL Spectrometer

    Open AccessJ R Southon, J S Vogel et al.ARTICLERadiocarbon1992Cited by: 6References: 5

    We report on the present status of the Lawrence Livermore AMS spectrometer, including sample throughput and progress towards routine 1% measurement capability for 14 C, first results on other isotopes and experience with a multisample high-intensity ion source

  • Lithium Contamination in AMS Measurements of 14 C

    Open AccessD H Loyd, J S Vogel et al.ARTICLERadiocarbon1991Cited by: 5References: 5

    High count rates of lithium ions in an AMS measurement system for 14 C were traced to the lithium content in the quartz tubes used in the graphitization of the samples. The lithium contamination was nearly eliminated by the use of borosilicate glass reaction tubes at a lower reaction temperature. The ion beam current and the measurement precision of the isotope ratio were not affected

  • Memory Effects in an AMS System

    Open AccessJ S Vogel, J R Southon et al.ARTICLERadiocarbon1990Cited by: 4References: 2

    A sample with a 14 C concentration estimated to be greater than 30,000 Modern was inadvertently graphitized and measured in an AMS system. No measurable contamination of the cesium sputter ion source was observed. Simple cleaning procedures removed the contamination from the sample preparation system, with the exception of the reaction vessel in which the sample was graphitized. Sample cross-contamination factors were estimated for all of the pre…

  • Accuracy and Precision in Dating Microgram Carbon Samples

    Open AccessJ S Vogel, D E Nelson et al.ARTICLERadiocarbon1989Cited by: 6References: 7

    The accuracy of AMS radiocarbon determinations on very small samples has been tested by measuring a suite of microgram-sized samples of a known-age material. The total measurement precision for the smallest sample (50μg) was found to be ± 3% and the precision improved with larger sample size. The accuracies of the measurements were found to be within the measurement precisions

  • AMS 14C Measurements of Fractionated Soil Organic Matter

    S E Trumbore, J S Vogel et al.ARTICLERadiocarbon1989Cited by: 9

    14 C measurements are reported for fractionated soil organic matter from a genetic soil sequence which was sampled several times during the period of atmospheric nuclear weapons testing. Fractionation of the soils by density followed by acid hydrolysis was successful in separating the organic matter into components with mean residence times for carbon ranging from 5 to 20 years (low density fraction) to several thousand years (residue after acid …

  • Ultra-Small Carbon Samples and the Dating of Sediments

    J S Vogel, Madeleine Briskin et al.ARTICLERadiocarbon1989Cited by: 4

    Radiocarbon dates from sediment core samples are usually obtained on the whole organic carbon portion in order to use as little of the valuable sediment as possible. Such measurements may not result in an accurate chronology of the sediment because the material may include carbon from different reservoirs at the time of deposition. The development of AMS techniques for dating ultra-small (20–500 μ g) carbon samples permits dating various componen…

  • Improved Collagen Extraction by Modified Longin Method

    Open AccessT A Brown, D E Nelson et al.ARTICLERadiocarbon1988Cited by: 315References: 5

    A re-evaluation of the Longin collagen-extraction method shows that a lower reflux temperature reduces degradation of protein (“collagen”) remnants. This allows additional purification through ultrafiltration to isolate the >30kDalton fraction of the reflux product

  • C Background Levels in An Accelerator Mass Spectrometry System

    Open AccessJ S Vogel, D E Nelson et al.ARTICLERadiocarbon1987Cited by: 61References: 7

    The levels and sources of the measurement background in an AMS 14 C dating system have been studied in detail. The relative contributions to the total background from combustion, graphitization, storage, handling, and from the accelerator were determined by measuring the C concentrations in samples of anthracite coal ranging in size from 15μg to 20mg. The results show that, for the present system, the uncertainty in the background is greater than…

  • Radiocarbon Dating Blood Residues on Prehistoric Stone Tools

    Open AccessD E Nelson, T H Loy et al.ARTICLERadiocarbon1986Cited by: 10References: 4

    We report here the first radiocarbon dating of blood residues on prehistoric stone tools. The residues found on two stone artifacts were subjected to various exploratory biochemical techniques to identify the species from which they were derived and to separate a suitable sample for dating by accelerator mass spectrometry. Although these techniques need much further development and detailed testing, the ages obtained in this first study were cons…

  • Accelerator Radiocarbon Dating at SFU

    Open AccessD E Nelson, J S Vogel et al.ARTICLERadiocarbon1986Cited by: 4References: 2

    The Simon Fraser University accelerator mass spectrometry (AMS) facility has now been in semi-routine use since the beginning of 1985. The advantages and limitations for 14 C dating are described

  • Tandem Accelerator Measurements of 10 Be Deposition Rates

    Open AccessDE Nelson, R G Korteling et al.ARTICLERadiocarbon1983Cited by: 1References: 7

    A Tandem Van de Graaff accelerator has been modified for use in the direct measurement of natural abundances of 10 Be and 14 C. A description of the system is given and some 10 Be results on oceanographic samples are discussed