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|Title:||Radiopurity of a CeBr3 crystal used as scintillation detector|
|Authors:||LUTTER GUILLAUME; HULT Mikael; BILLNERT ROBERT; OBERSTEDT Andreas; OBERSTEDT Stephan; ANDREOTTI ERICA; MARISSENS Gerd; ROSENGARD Ulf; TZIKA FAIDRA|
|Citation:||NUCLEAR INSTRUMENTS \& METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT vol. 703 p. 158-162|
|Publisher:||ELSEVIER SCIENCE BV|
|Type:||Articles in periodicals and books|
|Abstract:||Cerium bromide (CeBr3) has recently been shown to exhibit several properties making it a suitable material as a scintillation detector in nuclear physics applications. The intrinsic activity of gamma-ray emitting radionuclides in a 38.1 mm x 38.1 mm (diameter x height) crystal of CeBr3 was investigated. The measurements were carried out in the HADES underground laboratory located 225 m underground. Two primordial radionuclides were detected; 227Ac (and its daughters) with massic activity of 0.30 +/- 0.02 Bq/kg and 138La with massic activity of 7.4 +/- 1.0 mBq/kg. Two activation products were also detected; 139Ce and 82Br. Their massic activities (assuming a homogeneous distribution in the crystal) just before taking the CeBr3 crystal underground were 4.3 +/- 0.3 mBq/kg and18 +/- 4 mBq/kg correspondingly. None of the other common primordial radionuclides (40K, 226Ra, 228Ra, 228Th,and 235U) were detected and their detection limits were below 2 mBq/kg except for 238U for which the upper limit was135 mBq/kg and 210Pb with an upper limit of 600 mBq/kg.|
|JRC Directorate:||Health, Consumers and Reference Materials|
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