Hybrid Ultra-Low-Radioactive Material for Protecting Dark Matter Detector from Background Neutrons
A laboratory technology for a new ultra-low background hybrid material (HM) which meets the requirements for neutron absorption with simultaneous neutron detection has been developed. The technology and hybrid material can be useful for future low background underground detectors designed to directl...
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2021-07-01
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| Online Access: | https://www.mdpi.com/1996-1944/14/13/3757 |
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| author | Marina Zykova Mikhail Grishechkin Andrew Khomyakov Elena Mozhevitina Roman Avetisov Nadezda Surikova Maxim Gromov Alexander Chepurnov Ivan Nikulin Igor Avetissov |
| author_facet | Marina Zykova Mikhail Grishechkin Andrew Khomyakov Elena Mozhevitina Roman Avetisov Nadezda Surikova Maxim Gromov Alexander Chepurnov Ivan Nikulin Igor Avetissov |
| author_sort | Marina Zykova |
| collection | DOAJ |
| description | A laboratory technology for a new ultra-low background hybrid material (HM) which meets the requirements for neutron absorption with simultaneous neutron detection has been developed. The technology and hybrid material can be useful for future low background underground detectors designed to directly search for dark matter with liquid noble gases. The HM is based on a polymethylmethacrylate (PMMA) polymer matrix in which gadolinium nuclei are homogeneously distributed up to 1.5 wt% concentration in polymer slabs of 5 cm thickness. To determine the 65 impurity elements by the inductively coupled plasma mass-spectrometry (ICP-MS) technique in the Gd-based preparations in 100–0.01 ppb range, the corresponding method has been developed. Limits of determination (LD) of 0.011 ppb for uranium, and 0.016 ppb for thorium were achieved. An analysis of Gd raw materials showed that the lowest contents of U and Th (1.2–0.2 ppb) were detected in commercial Gd-based preparations. They were manufactured either from secondary raw materials (extraction phosphoric acid) or from mineral raw materials formed in sedimentary rocks (phosphogypsum). To produce the Gd-doped HM the commercial GdCl<sub>3</sub> was purified and used for synthesis of low-background coordination compound, namely, acetylacetonate gadolinium (Gd(acac)<sub>3</sub>) with U/Th contents less than LD. When dissolving Gd(acac)<sub>3</sub> in methylmethacrylate, the true solution was obtained and its further thermal polymerization allowed fabrication of the Gd-doped PMMA with ultra-low background. |
| first_indexed | 2024-03-10T09:50:45Z |
| format | Article |
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| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T09:50:45Z |
| publishDate | 2021-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-5d521629d4554dea9d12b1c77ac2b0af2023-11-22T02:45:31ZengMDPI AGMaterials1996-19442021-07-011413375710.3390/ma14133757Hybrid Ultra-Low-Radioactive Material for Protecting Dark Matter Detector from Background NeutronsMarina Zykova0Mikhail Grishechkin1Andrew Khomyakov2Elena Mozhevitina3Roman Avetisov4Nadezda Surikova5Maxim Gromov6Alexander Chepurnov7Ivan Nikulin8Igor Avetissov9Department of Chemistry and Technology of Crystals, Mendeleev University of Chemical Technology, 125047 Moscow, RussiaDepartment of Chemistry and Technology of Crystals, Mendeleev University of Chemical Technology, 125047 Moscow, RussiaDepartment of Chemistry and Technology of Crystals, Mendeleev University of Chemical Technology, 125047 Moscow, RussiaDepartment of Chemistry and Technology of Crystals, Mendeleev University of Chemical Technology, 125047 Moscow, RussiaDepartment of Chemistry and Technology of Crystals, Mendeleev University of Chemical Technology, 125047 Moscow, RussiaSkobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, RussiaSkobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, RussiaSkobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, RussiaDepartment of Engineering Material Science, Belgorod State National Research University, 308015 Belgorod, RussiaDepartment of Chemistry and Technology of Crystals, Mendeleev University of Chemical Technology, 125047 Moscow, RussiaA laboratory technology for a new ultra-low background hybrid material (HM) which meets the requirements for neutron absorption with simultaneous neutron detection has been developed. The technology and hybrid material can be useful for future low background underground detectors designed to directly search for dark matter with liquid noble gases. The HM is based on a polymethylmethacrylate (PMMA) polymer matrix in which gadolinium nuclei are homogeneously distributed up to 1.5 wt% concentration in polymer slabs of 5 cm thickness. To determine the 65 impurity elements by the inductively coupled plasma mass-spectrometry (ICP-MS) technique in the Gd-based preparations in 100–0.01 ppb range, the corresponding method has been developed. Limits of determination (LD) of 0.011 ppb for uranium, and 0.016 ppb for thorium were achieved. An analysis of Gd raw materials showed that the lowest contents of U and Th (1.2–0.2 ppb) were detected in commercial Gd-based preparations. They were manufactured either from secondary raw materials (extraction phosphoric acid) or from mineral raw materials formed in sedimentary rocks (phosphogypsum). To produce the Gd-doped HM the commercial GdCl<sub>3</sub> was purified and used for synthesis of low-background coordination compound, namely, acetylacetonate gadolinium (Gd(acac)<sub>3</sub>) with U/Th contents less than LD. When dissolving Gd(acac)<sub>3</sub> in methylmethacrylate, the true solution was obtained and its further thermal polymerization allowed fabrication of the Gd-doped PMMA with ultra-low background.https://www.mdpi.com/1996-1944/14/13/3757polymethylmethacrylategadoliniumuraniumthoriumhybrid materialinductively coupled plasma mass spectrometry |
| spellingShingle | Marina Zykova Mikhail Grishechkin Andrew Khomyakov Elena Mozhevitina Roman Avetisov Nadezda Surikova Maxim Gromov Alexander Chepurnov Ivan Nikulin Igor Avetissov Hybrid Ultra-Low-Radioactive Material for Protecting Dark Matter Detector from Background Neutrons Materials polymethylmethacrylate gadolinium uranium thorium hybrid material inductively coupled plasma mass spectrometry |
| title | Hybrid Ultra-Low-Radioactive Material for Protecting Dark Matter Detector from Background Neutrons |
| title_full | Hybrid Ultra-Low-Radioactive Material for Protecting Dark Matter Detector from Background Neutrons |
| title_fullStr | Hybrid Ultra-Low-Radioactive Material for Protecting Dark Matter Detector from Background Neutrons |
| title_full_unstemmed | Hybrid Ultra-Low-Radioactive Material for Protecting Dark Matter Detector from Background Neutrons |
| title_short | Hybrid Ultra-Low-Radioactive Material for Protecting Dark Matter Detector from Background Neutrons |
| title_sort | hybrid ultra low radioactive material for protecting dark matter detector from background neutrons |
| topic | polymethylmethacrylate gadolinium uranium thorium hybrid material inductively coupled plasma mass spectrometry |
| url | https://www.mdpi.com/1996-1944/14/13/3757 |
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