Measurements of gamma-ray background radiation in Pyhäsalmi mine

S Pohuliai; A Sokolov; V Gostilo; J Joutsenvaara; J Puputti

doi:10.1016/j.apradiso.2020.109166

Measurements of gamma-ray background radiation in Pyhäsalmi mine

Appl Radiat Isot. 2020 Jul:161:109166. doi: 10.1016/j.apradiso.2020.109166. Epub 2020 Apr 2.

Authors

S Pohuliai¹, A Sokolov¹, V Gostilo², J Joutsenvaara³, J Puputti³

Affiliations

¹ Baltic Scientific Instruments, Ramulu Str. 3, LV-1005, Riga, Latvia.
² Baltic Scientific Instruments, Ramulu Str. 3, LV-1005, Riga, Latvia. Electronic address: office@bsi.lv.
³ Kerttu Saalasti Institute, University of Oulu, Pajatie 5, 86800, Nivala, Finland.

PMID: 32321699
DOI: 10.1016/j.apradiso.2020.109166

Abstract

The results of measuring the gamma background radiation in Lab 5 of the underground facility in the Pyhäsalmi Mine at a depth of 1410 m are presented. The background integral count rate per kg of germanium of the HPGe-detector was 0.028 s^-1 × kg^-1. After purging the measuring chamber with nitrogen gas at a rate of 0.15 L/h the count rate was reduced to 0.021 s^-1 × kg^-1.

Keywords: Gamma-ray background radiation; HPGe spectrometry; Underground laboratory.