University of Oulu

T Enqvist et al 2017 J. Phys.: Conf. Ser. 888 012098

Towards ¹⁴C-free liquid scintillator

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Author: Enqvist, T1; Barabanov, R2; Bezrukov, L B2;
Organizations: 1Oulu Southern Institute and Astronomy Research Unit, University of Oulu, Finland
2Institute for Nuclear Research, Russian Academy of Sciences, Moscow, Russia
3Department of Physics, University of Jyväskylä, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 0.2 MB)
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Language: English
Published: IOP Publishing, 2017
Publish Date: 2018-03-09


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 concentrations smaller than 10−18. Measurements take place in two underground laboratories: in the Baksan Neutrino Observatory, Russia, and in the new Callio Lab in the Pyhäsalmi mine, Finland. Low-energy neutrino detection with a liquid scintillator requires that the intrinsic ¹⁴C concentration in the liquid is extremely low. In the Borexino CTF detector the concentration of 2 × 10−18 has been achieved being the lowest value ever measured. In principle, the older the oil or gas source that the liquid scintillator is derived from and the deeper it situates, the smaller the ¹⁴C concentration is supposed to be. This, however, is not generally the case and the concentration is probably due to the U and Th content of the local environment.

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Series: Journal of physics. Conference series
ISSN: 1742-6588
ISSN-E: 1742-6596
ISSN-L: 1742-6588
Volume: 888
Article number: 012098
DOI: 10.1088/1742-6596/888/1/012098
Type of Publication: A4 Article in conference proceedings
Field of Science: 1171 Geosciences
114 Physical sciences
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