title: Laboratory application of NaI(Tl) gamma-ray spectrometry to studies of natural radioactivity in geophysics
abstract: We implemented a laboratory apparatus based on a NaI(TI) gamma-ray spectrometer for the assessment of naturally occurring radioactive materials. This apparatus is devoted to the quantitative determination of U, Th and K in rock and soil samples. We analysed the calibration procedures with particular emphasis to factors which affect accuracy and detection limits. A first series of measurements were compared to those obtained by means of high energy gamma-ray spectrometry. A discussion was made on factors restricting the approach based on scintillation spectrometry, such as secular equilibrium and radon encapsulation.
authors.affiliation: Dipartimento per lo Studio del Territorio e delle sue Risorse, Settore di Geofisica, Universita di Genova, Italy.
authors.initials: P
authors.lastname: Chiozzi
authors.lastname: De Felice P
authors.initials: A
authors.lastname: Fazio
authors.initials: V
authors.lastname: Pasquale
authors.initials: M
authors.lastname: Verdoya