Risø Low-level Beta Counter [GM25-5]

Sefydliad rheoli Daearyddiaeth a Gwyddorau Daear
Math Offer
Rhiant/ Rhieni
    Dyddiad caffael01 Jan 1995
    GweithgynhyrchyddTechnical University of Denmark
    Gwefanhttp://www.aber.ac.uk/en/rbi/
    E-bostresearch@aber.ac.uk
    Ffôn0044 1970 622385
    Lleoliad
    Math o gyfeiriadCyfeiriad post
    Cod postSY23 3DA
    GwladTeyrnas Unedig Prydain Fawr a Gogledd Iwerddon
    Llinellau cyfeiriad
    • B7
      Llandinam Building
      Penglais
      Aberystwyth University
      Abersytwyth
      SY23 3DA
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    Low-level gas flow beta multicounter system for the measurement of 5 samples simultaneously.
    The basic part of the Risø low-level beta multicounter system is a gas-flow unit with dimensions of 50x100x250 mm which incorporates five individual GM sample counter elements and a common guard counter.
    The guard counter reduces the cosmic-ray background by using anticoincidence technique. Each sample counter element is provided with an aluminized Mylar window of density < 1 mg/cm2 and diameter 25 mm. The counters are gas-flow types designed for 99 % Ar/1 % isobutane or 99 % Ar/1% propane counter gas. A sample slide allows five samples to be inserted into the multicounter. These samples are measured simultaneously. A lift mechanism minimizes the sample-to-window distance to obtain optimal efficiency. The multicounter is normally placed inside a lead shielding of 100 mm thickness to reduce the ambient background radiation.

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