title: Lead shielding efficiency from the gamma background measurements in the salt cavern of the Polkowice-Sieroszowice copper mine.
abstract: The studies of lead shielding efficiency from the gamma background measurements were performed in the salt cavern of the copper mine - a site considered for an underground laboratory. Within the energy range of 50-2700 keV, the measured gamma-ray count rates normalized to the mass of the high-purity detectors germanium crystal are 5.93 and 6.32 s-1kg-1for the used low-background and portable spectrometers, respectively. The gamma-ray flux of 0.124 (2) cm-2s-1connected with the natural radioisotopes was observed by the portable HPGe, including 0.026 (1) cm-2s-1contribution of radon decay products, whereas the photon flux at the spectrum continuum was 0.18 (5) cm-2s-1.
authors.affiliation: Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland.
authors.forename: Kinga
authors.initials: K
authors.lastname: Polaczek-Grelik
authors.affiliation: Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland.
authors.forename: Jan
authors.initials: J
authors.lastname: Kisiel
authors.affiliation: Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland.
authors.forename: Agata
authors.initials: A
authors.lastname: Walencik-Łata
authors.affiliation: IFJ PAN, Radzikowskiego 152, 31-342 Kraków, Poland.
authors.forename: Jerzy W
authors.initials: JW
authors.lastname: Mietelski
authors.affiliation: IFJ PAN, Radzikowskiego 152, 31-342 Kraków, Poland ; AGH University of Science and Technology, Mickiewicza 30, 30-059 Kraków, Poland.
authors.forename: Paweł
authors.initials: P
authors.lastname: Janowski
authors.affiliation: IFJ PAN, Radzikowskiego 152, 31-342 Kraków, Poland.
authors.forename: Małgorzata
authors.initials: M
authors.lastname: Harańczyk
authors.affiliation: IFJ PAN, Radzikowskiego 152, 31-342 Kraków, Poland.
authors.forename: Jan
authors.initials: J
authors.lastname: Jurkowski
authors.affiliation: IFJ PAN, Radzikowskiego 152, 31-342 Kraków, Poland.
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Zalewska
authors.affiliation: Polkowice-Sieroszowice Mine, Division of KGHM Polska Miedź S.A., Kaźmierzów, Poland.
authors.forename: Jan
authors.initials: J
authors.lastname: Kobziński
authors.affiliation: Polkowice-Sieroszowice Mine, Division of KGHM Polska Miedź S.A., Kaźmierzów, Poland.
authors.forename: Paweł
authors.initials: P
authors.lastname: Markowski
authors.affiliation: Polkowice-Sieroszowice Mine, Division of KGHM Polska Miedź S.A., Kaźmierzów, Poland.
authors.forename: Andrzej
authors.initials: A
authors.lastname: Sadowski
keywords: Gamma background; Gamma-ray spectrometry; Lead shielding efficiency; Natural radioactivity; Underground laboratory