A mini X-ray generator as an alternative to a 90Sr/90Y beta source in luminescence dating

C.E. Andersen, L. Bøtter-Jensen, A.S. Murray

    Research output: Contribution to journalConference articleResearchpeer-review

    Abstract

    We have carried out an investigation to test whether mini X-ray generators are a suitable alternative to radioactive sources in luminescence dating. The study has mainly been motivated by the need for high dose rates (similar to 1 Gy/s) to make dating of older samples using regeneration protocols more practical. Furthermore, X-ray generators are more suited for field work and work in countries where regulations restrict the use of radioactive sources. The system tested here (a 50 kV I mA Varian VF-50J tube with tungsten target and a matched Spellman high-voltage power supply) was found to provide: (i) excellent linearity between tube current (as set by the user on the control computer) and dose rate, (ii) a wide dynamic range: 2-30 mGy/s at 10 kV and 10-2000 mGy/s at 50 kV, (iii) short-term stability better than 0.2%, and (iv) a highly uniform irradiation of the sample area. Tests with a sample of thermally sensitized sedimentary quartz suggest that we can use beta and X-ray irradiation interchangeably from the point of view of construction of growth curves by the single-aliquot regenerative-dose protocol. (C) 2003 Elsevier Science Ltd. All rights reserved.
    Original languageEnglish
    JournalRadiation Measurements
    Volume37
    Issue number4-5
    Pages (from-to)557-561
    ISSN1350-4487
    DOIs
    Publication statusPublished - 2003
    Event10th International Conference on Luminescence and Electron-Spin Resonance Dating - Reno, United States
    Duration: 24 Jun 200228 Jun 2002

    Conference

    Conference10th International Conference on Luminescence and Electron-Spin Resonance Dating
    CountryUnited States
    CityReno
    Period24/06/200228/06/2002

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