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23rd International Conference on Radionuclide Metrology and its Applications - ICRM 2023

26–31 Mar 2023
Europe/Bucharest timezone

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Session

Liquid scintillation counting techniques

LSC
30 Mar 2023, 09:00

Conveners

Liquid scintillation counting techniques: 4 Oral and 1 Poster contributions

  • Karsten Kossert (Physikalisch-Technische Bundesanstalt)
  • Philippe Cassette (Sofia University st. kliment ohridski)

Liquid scintillation counting techniques: ICRM WG Meeting

  • Philippe Cassette (Sofia University st. kliment ohridski)
  • Karsten Kossert (Physikalisch-Technische Bundesanstalt)

Description

Liquid scintillation counting measurements

Presentation materials

There are no materials yet.

  1. 14. Uncertainties in TDCR measurement revisited: contribution of optical effects
    Philippe Cassette (Sofia University st. kliment ohridski)
    30/03/2023, 09:00
    Liquid scintillation counting techniques
    Oral

    In the Triple to Double Coincidence Ratio (TDCR) method in Liquid Scintillation Counting, the detection efficiency is calculated from the value of a free parameter describing the intrinsic light yield of the counting system. This model is generally based on a Poisson distribution of the number of photoelectrons detected: if an energy E is transferred to the liquid scintillator, an average of m...

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  2. 28. Activity standardization of 60Co and 106Ru/106Rh by means of the TDCR method and the importance of beta spectrum
    Christophe BOBIN (LNE-LNHB)
    30/03/2023, 09:20
    Liquid scintillation counting techniques
    Oral

    This paper presents the results obtained with two primary techniques (4pibeta-gamma and TDCR methods) in the case of the activity standardization of two ߯ emitters (60Co and 106Ru/106Rh). In particular, the impact of the calculated ß-spectra implemented for the activity calculation with the TDCR statistical model is addressed.
    Cobalt-60 (T½ ~ 5.2711 (8) a) disintegrates by ߯ emission to...

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  3. 31. Measurement of the activity and determination of the half-life of 225Ac at POLATOM.
    Dr Ryszard Broda (National Centre for Nuclear Research Radioisotope Centre POLATOM, Poland)
    30/03/2023, 09:40
    Liquid scintillation counting techniques
    Oral

    Authors and affiliations: R. Broda 1, T. Ziemek 1, J. Marganiec-Gałązka 1, M. Czudek 1, K. Kossert 2, A. Listkowska 1, E. Lech 1, Z. Tymiński 1
    1 NCBJ Radioisotope Centre POLATOM, A. Sołtana 7, 05-400 Otwock, Poland
    2 Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, 38116, Braunschweig, Germany

    The applications of an alpha emitter 225Ac in targeted cancer therapy are being...

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  4. 33. Primary standardization of Ac-225 at NRC
    Raphael Galea (National Research Council of Canada)
    30/03/2023, 10:00
    Liquid scintillation counting techniques
    Oral

    A solution of Ac-225 was standardized by NRC using the triple-to-double coincidence ratio (TDCR) method. The counting efficiencies were calculated assuming a counting efficiency of 100% for alpha decays and those calculated using the MICELLE2 monte carlo code for beta decays and was approximately 500% for the NRC TDCR system. The relative uncertainty for the activity concentration was...

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  5. 9. Liquid scintillation counting of internal conversion electrons for the quantification of 109Cd activity using a 3 photomultipliers tubes system and a specific energy distribution unfolding method
    Dr Romain Coulon (BIPM)
    30/03/2023, 10:20
    Liquid scintillation counting techniques
    Poster

    109Cd is an electron-capture radionuclide used to calibrate gamma spectrometer in the low energy domain thanks to its 88 keV gamma-rays. Therefore, it is critical to produce standard solutions of 109Cd with a high accuracy. However, the specific decay scheme of 109Cd is a challenge for metrology. It indeed disintegrates by electron capture into 109mAg whose metastable state makes it impossible...

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  6. 95. The LNMRI/IRD participation in BIPM/CCRI Cd-109 comparison
    Liquid scintillation counting techniques
    Poster

    Authors (affiliation): LNMRI/IRD/CNEN
    The LNMRI/IRD participation in BIPM/CCRI Cd-109 Comparison

    This article describes the Cd-109 standardization made by LNMRI/IRD in the for comparison exercise organized by the BIPM. In this work, the Cd-109 main difficulties in the standardization will be shown, the measurement were performed with a homemade cell for liquid scintillation.
    By analyzing...

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