Specific software developed by the LNHB


ETNA (Efficiency Transfer for Nuclide Activity measurements) has two gamma-ray spectrometry utilities that can be used to calculate:
– the efficiency transfer factor in the case of a change in geometric conditions between efficiency calibration and sample measurement,
– corrective factors for the effects of true coincidences, related to the decay scheme of radionuclides with gamma cascade emissions.

If you have any questions about ETNA, please contact us using the form below.


The detailed processing of gamma and X-ray spectra requires determining the areas of the total absorption peaks. This determination is easy for isolated peaks on a constant background, but this is not the case in spectrum regions where peaks are superimposed and/or on a variable background, and specific tools need to be implemented. The COLEGRAM software makes it possible to adjust different functions at the experimental points of a spectrum. The visualization of the calculated and experimental points as well as the residuals allows to follow the evolution of the adjustment and the quality of the results.

If you have any questions about COLEGRAM, please contact us via the form below.

BetaShape – Beta spectra computing – Version: 2.0 (15/10/2019)

The BetaShape program has been developed to improve nuclear data related to beta emission and electron capture properties. Use of the code, with options, and improvements over version 1 are briefly described in the README.txt file.

Beta Transitions
Mean energies, log (ft) values, beta and neutrino spectra for single and multiple transitions are provided. A database of experimental shape factors is included and has been updated. The uncertainties provided by the input parameters are taken into account and propagated.

Electron captures
Capture probabilities and capture-to-beta-plus ratios are provided for each atomic subshell. The log(ft) value of each transition is calculated. For a given branch, the splitting between capture and beta plus transitions is also determined.

The spectra and capture probabilities pre-calculated with BetaShape are available on the atomic and nuclear data page, in the column ‘ASCII files’, by clicking on the ‘B’ button for the desired nuclide.

– X. Mougeot, Physical Review C 91, 055504; Erratum Phys. Rev. C 92, 059902 (2015)
DOI : https://doi.org/10.1103/PhysRevC.92.059902
– X. Mougeot, Applied Radiation and Isotopes 154 (2019) 108884
DOI : https://doi.org/10.1016/j.apradiso.2019.108884

Download BetaShape:

BetaShape – V2 – Windows 7 (zip file, 14.6 Mo)
BetaShape – V2 – Scientific Linux (zip file, 4.16 Mo)
BetaShape – OS X (zip file, 2.50 Mo)


For more information about our services, please contact us!