Software and tools developed by the LNHB

BetaShape – Beta spectra computing

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 the previous versions 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, Applied Radiation and Isotopes 201 (2023) 111018
– X. Mougeot, Applied Radiation and Isotopes 154 (2019) 108884

Download BetaShape – Stable version: 2.3.1 (12/5/2023):

BetaShape – Windows 10 (Zip file, 25 MB)
BetaShape – Scientific Linux 6.4 (Zip file, 11 MB)
BetaShape – Linux Ubuntu 20.04 (Zip file, 31.1 MB)
BetaShape – Linux CentOS 8 (Zip file, 21.6 MB)
BetaShape – macOS Monterey (M1) (Zip file, 7.58 MB)
BetaShape – macOS Monterey (Intel) (Zip file, 7.66 MB)
BetaShape – ReadMe (Txt file)
BetaShape – Manual (Pdf file)
BetaShape – CSV format details (Excel file)
Warning: For Linux/macOS users, please read first the README file about the environment variable PATH.


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.

– COLEGRAM, a flexible user-friendly software for processing of ionizing radiation spectra, Y. Ménesguen and M.-C. Lépy, Nuclear Inst. and Methods in Physics Research, A 1003 (2021) 165341


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.


More specifically dedicated to users of alpha and gamma spectrometry, the NUCLÉIDE-LARA application makes it possible to consult and perform queries on the decay data for more than 400 radionuclides (half-life, decay mode, emission energy and intensity, decay scheme…).

The application can be found at the following address:

If you have any questions about NUCLÉIDE-LARA, please contact us using the form below.


Metrology of X fundamental parameters

In order to ensure the quality of the quantitative results by X-ray analysis techniques, measurements of atomic parameters (attenuation coefficients, fluorescence yields) are carried out for the elements of interest. The laboratory’s experimental results concerning attenuation coefficients can be consulted thanks to the MACAO tool, available on the following site:

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


PUFI (PENELOPE User-Friendly Interface) is a convenient interface designed to facilitate the preparation of PENELOPE geometry files for application to gamma-ray spectrometry. The software considers typical cases with a cylindrical geometry including detector, volume source and shielding.

Download PUFI:

PUFI – Windows (Fichier zip, 92,7 Mo)

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


For more information about our services, please contact us!