Neutron activation analysis of polyethylene from neutron shield of EDELWEISS experiment
A. V. RakhimovV. BrudaninJoint Institute for Nuclear Research (JINR), Dubna, Russian Federation, 141980Dmitry FilosofovJoint Institute for Nuclear Research (JINR), Dubna, Russian Federation, 141980P. LoaizaLaboratoire Souterrain de Modane (LSM), CEA-CNRS, 1125 route de Bardonnèche, 73500 Modane, FranceG. MarinovJoint Institute for Nuclear Research (JINR), Dubna, Russian Federation, 141980A. A. MirsagatovaInstitute of Nuclear Physics of Uzbek Academy of Sciences (INP AS RUz), Tashkent, Uzbekistan, 100214D.V. MedvedevJoint Institute for Nuclear Research (JINR), Dubna, Russian Federation, 141980N. M. MukhamedshinaInstitute of Nuclear Physics of Uzbek Academy of Sciences (INP AS RUz), Tashkent, Uzbekistan, 100214S. RozovJoint Institute for Nuclear Research (JINR), Dubna, Russian Federation, 141980Ilkham I. SadikovInstitute of Nuclear Physics of Uzbek Academy of Sciences (INP AS RUz), Tashkent, Uzbekistan, 100214G. WarotLaboratoire Souterrain de Modane (LSM), CEA-CNRS, 1125 route de Bardonnèche, 73500 Modane, FranceE. YakushevJoint Institute for Nuclear Research (JINR), Dubna, Russian Federation, 141980
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Abstract Instrumental neutron-activation analysis (INAA) was applied to estimate trace contaminations in polyethylene (PE) used as a neutron shield for low background setup of the EDELWEISS Dark Matter search experiment. PE samples with masses of 1–10 grams each were irradiated at the WWR-SM nuclear reactor by neutron flux of 1 · 10 14 n/(cm 2 s) for 5–48 h. The radioactivity was measured by high-resolution γ -ray spectrometry. In PE samples of two types, more than 30 trace elements were determined at a concentration level of 10 −5 to 10 – 11 g/g.
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