Journal of Radioanalytical and Nuclear Chemistry

, Volume 314, Issue 2, pp 583–589 | Cite as

Design and performance of a miniature TDCR counting system

  • K. Mitev
  • P. Cassette
  • V. Jordanov
  • H. R. Liu
  • Ch. Dutsov


A portable liquid scintillation counting system based on the triple-to-double coincidence ratio (TDCR) method was developed at Sofia University “St. Kliment Ohridski”. The system consists of a miniature TDCR counter with cylindrical optical chamber and a specialized TDCR counting module named nanoTDCR. The nanoTDCR module is produced by the labZY company and provides several important new TDCR counting functionalities like: individual extending-type dead-time in each channel; simultaneous counting with two different extendable dead-times and two different coincidence windows and simultaneous TDCR counting and spectrum acquisition. The performance of the new system was tested in benchmark comparisons with the LNHB’s primary TDCR counting system of activity measurements of 241Am, 3H, 14C and 63Ni. Good agreement between the two systems was observed.


TDCR counter Miniature TDCR system NanoTDCR Extending dead time Absolute activity measurement 



This work is supported by the Bulgarian National Science Fund under Contract DFNI T02/13”POLYRAD”. The authors are indebted to Mr. Nikolay Markov and Mr. Todor Todorov for the mechanical work on the TDCR counter, which was manufactured and assembled in Bulgaria.

Supplementary material

10967_2017_5451_MOESM1_ESM.pdf (483 kb)
Supplementary material 1 (PDF 482 kb)


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2017

Authors and Affiliations

  1. 1.Faculty of PhysicsSofia University “St. Kliment Ohridski”SofiaBulgaria
  2. 2.CEA, LIST, Laboratoire National Henri Becquerel, LNE-LNHBGif-sur-YvetteFrance
  3. 3.LABZY, LLCSanta FeUSA
  4. 4.Division of Ionizing RadiationNational Institute of MetrologyBeijingPeople’s Republic of China

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