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
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...
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...
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...
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...
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...
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...
