RU3 INFN

STELLA (SubTErranean Low Level Assay, https://www.lngs.infn.it/en/special-techniques ) facility  has global leadership in the measurement and identification of  ultra-low levels of radioactivity and rare nuclear processes in materials.

The measurement techniques employed are gamma-ray spectroscopy with several high purity Germanium detectors, alpha spectroscopy with silicon PIPS detectors, and alpha/beta spectroscopy with liquid scintillation counters.

Since 2006 the laboratory is participating regularly to national international intercomparison exercises organized by accredited institutions (e.g. ENEA, IAEA).