A New Low Background Laboratory in the Pyhäsalmi Mine: Towards 14C free liquid scintillator for low energy neutrino experiments
S. Lubsandorzhiev*, K. Enqvist, J. Hissa, J. Joutsenvaara, J. Kutuniva, A. Virkajärvi, L. Bezrukov, P. Kuusiniemi, V. Kazalov, S. Krokhaleva, B. Lubsandorzhiev, A. Sidorenkov, K. Loo, W.H. Trzaska and M. Słupecki
August 16, 2017
August 03, 2018
A new low background laboratory in Pyhäsalmi mine in the Central Finland has been put into operation in the beginning of 2017. The laboratory operates at the depth of 1436 m (~4100 meters of water equivalent). In this paper we present description of the laboratory’s existing facility and background conditions. In the laboratory a series of measurements has been started where the 14C concentration is determined from several liquid scintillator samples. A dedicated setup has been designed and constructed with the aim of measuring the 14C/12C ratio smaller than 10-18.
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