Nucléide is the computerized form of the "Table de Radionucléides" from CEA-List/LNE-LNHB ,

it includes also the data published in the Monographie BIPM-5. The aim of this Table is to provide

recommended decay data for nuclides of special interest for metrology or practical applications like

nuclear medicine, monitoring and reactor shielding, etc. Primary recommended decay data comprise

half-lives, decay modes, X-rays, gamma-rays, alpha- and beta-particle transitions and emissions, and

associated uncertainties. Decay schemes are automatically drawn from the data.

The Laboratoire National de Métrologie et d'Essais (LNE) has designated the Laboratoire

National Henri Becquerel (LNHB) as the "Primary Standards Laboratory for Ionizing Radiation

Metrology" and has given it the responsibility for the preparation and improvement of national primary

standards for the units in radioactivity and ionizing radiation dosimetry.

As part of these duties, it carries out studies related to:

- measurement instruments and methods,

- radiometrological constants,

- decay data evaluation.

The LNHB is also a laboratory of the Commissariat à l'Énergie Atomique (CEA) which is the French national

agency in charge of nuclear research and development.

More information about LNHB: http://www.nucleide.org