BetaShape: A new code for improved analytical calculations of beta spectra

Xavier Mougeot (1)

1 LNHB (CEA, LIST) - Laboratoire National Henri Becquerel (CEA, LIST)

The new code BetaShape has been developed in order to improve the nuclear data related to beta decays. An analytical model was considered, except for the relativistic electron wave functions, for ensuring fast calculations. Output quantities are mean energies, log ft values and beta and neutrino spectra for single and multiple transitions. The uncertainties from the input parameters, read from an ENSDF file, are propagated. A database of experimental shape factors is included. A comparison over the entire ENSDF database with the standard code currently used in nuclear data evaluations shows consistent results for the vast majority of the transitions and highlights the improvements that can be expected with the use of BetaShape.

Mots clés: experimental shape factor; analytical model; beta decay; beta-rays; nuclear data; relativistic electron wave function; mean energies; single transition; nuclear; radioactivity; multiple transition; beta spectrum; Neutrino spectrum; metrology; ENSDF database; radionuclide; Ionizing radiation; Decay data evaluation

Domaines: Physique Nucléaire Expérimentale [nucl-ex]; Physique Numérique [physics.comp-ph]; Base de données [cs.DB]; Analyse de données, Statistiques et Probabilités [physics.data-an]

Xavier Mougeot. BetaShape: A new code for improved analytical calculations of beta spectra. ND 2016: International Conference on Nuclear Data for Science and Technology, Sep 2016, Bruges, Belgium. pp.12015, ⟨10.1051/epjconf/201714612015⟩. ⟨cea-01809226⟩