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Nuclide Master Plus software package has been developed for calculation of registration efficiency and correction factors for true coincidences. It is also used for correction of gamma radiation intensities in radionuclides library. EffCalcMC (Efficiency Calculation Monte-Carlo) is the main program.
Version: 2.9.708
Update date: 19-10-2016
System requirements:
Windows XP, Vista, 7
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Nuclide Master En.pdf
TCCFCALC (True Coincidence Correction Factor CALCulation) utility has been added to Nuclide Master for:
  • calculation of true coincidence correction factor and correction of gamma radiation intensities in radionuclides library;
  • calculation of registration efficiency.
When a file with correction factors is included into processing software SpectraLine, the true coincidence effect is corrected at the activity calculation.

Scope of application
The calculation is based on Monte-Carlo method using parameters of the required nuclides from the library of evaluated nuclear structure data ENSDF. The factors can be calculated for different detectors types (semiconducting and scintillation) which are saved in database compatible with EffMaker software. Marinelli vessels, cylinder and point can be used as the measurement geometries.

  • detectors and measurement geometries parameters setting and saving in database;
  • lines and radionuclides lists creation;
  • calculation of efficiency registration and correction factors for true coincidence using Monte-Carlo method;
  • data filtering;
  • creation and addition of correction factors for true coincidence library;
  • data viewing and saving in registration efficiency library;
  • correction of gamma-radiation intensities in radionuclides library;
  • batch processing possibility for several geometries and energy ranges.

Calculation of correction factors for true coincidence
True-coincidence summing in/out effect represents a serious problem in different applications of gamma-spectrometry strongly influencing accuracy of the obtained analytical results. To solve this problem a special utility TCCFCALC (True Coincidence Correction Factor CALCulation) was created. It allows to perform calculations for any known gamma-emitting radionuclides and for a wide set of measurement geometries including scintillation and HPGe detectors with point and volumetric sources (Marinelli or cylindrical beaker with arbitrary dimensions).

The calculation is based on the Monte-Carlo method with application of the most complete, precise and recent decay data from Evaluated Nuclear Structure Data File (ENSDF).

High precision and reliability of calculations with TCCFCALC, which were confirmed by numerous tests, were achieved due to the most complete consideration of the physical processes, contributing to the true-coincidence summing. In addition to gamma-gamma correlations they include correlations between gamma-rays and annihilation photons accompanying b+-decay and correlations between gamma-rays and X-rays of K- and L-series emitted as a result of the internal conversion and electron capture processes. Besides the spatial correlations of gamma-rays (so called gamma-rays angular correlations) and time dynamics of a decay (finite live-times of exited states of a daughter nucleus) are taken into account.

True coincidence factors calculation (Atomic energy, 2006)
(PDF, 414 КБ)

State Registration
Nuclide Master Plus was registered in the State Register of computer programs on the 6th of May 2014.

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