title: Comparison of inductively coupled mass spectrometry and ultra low-level gamma-ray spectroscopy for ultra low background material selection.
abstract: The main target of this study is the development and the validation of an internal procedure to measure the pg g(-1) levels, of naturally occurring radioisotopes to select ultra low background detector materials. As there are no ultra low-level certified reference materials commercially available, the performance of ICP-MS was compared with the well established ultra low-level gamma-spectroscopy. This work shows also the reliability of very quick ICP-MS semi-quantitative analyses of an environmental matrix such as a geological sample treated according to conventional protocols.
authors.affiliation: Laboratori Nazionali del Gran Sasso, INFN, S. S. 17/bis km 18+910, I-67010 Assergi (AQ), Italy. stefano.nisi@lngs.infn.it
authors.forename: S
authors.initials: S
authors.lastname: Nisi
authors.forename: A
authors.initials: A
authors.lastname: Di Vacri
authors.forename: M L
authors.initials: ML
authors.lastname: Di Vacri
authors.forename: A
authors.initials: A
authors.lastname: Stramenga
authors.forename: M
authors.initials: M
authors.lastname: Laubenstein
mesh_terms: D019015:Geologic Sediments; D013058:Mass Spectrometry / Q000379:methods / Q000592:standards*; D011868:Radioisotopes / Q000032:analysis*; D013051:Spectrometry, Gamma / Q000379:methods / Q000592:standards*
chemical_list: D011868:Radioisotopes