Cohen, Anthony S.; O'Nions, R. Keith and Belshaw, Nicholas S.
|DOI (Digital Object Identifier) Link:||http://doi.org/10.1016/0168-1176(92)80020-2|
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Mass spectrometric methods are presented for the precise determination of the isotopic compositions of uranium, thorium and radium. M+ ions were produced by thermal ionisation. Analysis involved either a dynamic routine using the Daly detector or a static routine employing both the Daly detector and off-axis Faraday detectors. Instrument performance was assessed using a set of uranium standards, CBNM IRM 072. The response of the Daly detector was linear up to ratios of at least 5 x 10(4) and when operated dynamically it is ideally suited to the measurement of ion beams in the range 5-1 x 10(5) cps. The static mode of analysis was employed successfully for the measurement of isotope ratios up to 5 x 10(5).
|Item Type:||Journal Article|
|Keywords:||isotope ratio; thermal ionisation; uranium; thorium; radium|
|Academic Unit/Department:||Faculty of Science, Technology, Engineering and Mathematics (STEM) > Environment, Earth and Ecosystem Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
|Interdisciplinary Research Centre:||Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)|
|Depositing User:||Anthony Cohen|
|Date Deposited:||07 Oct 2008 07:03|
|Last Modified:||04 Oct 2016 10:13|
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