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...
Ausführliche Beschreibung
Autor*in: |
Marina Zykova [verfasserIn] Mikhail Grishechkin [verfasserIn] Andrew Khomyakov [verfasserIn] Elena Mozhevitina [verfasserIn] Roman Avetisov [verfasserIn] Nadezda Surikova [verfasserIn] Maxim Gromov [verfasserIn] Alexander Chepurnov [verfasserIn] Ivan Nikulin [verfasserIn] Igor Avetissov [verfasserIn] |
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E-Artikel |
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Sprache: |
Englisch |
Erschienen: |
2021 |
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Übergeordnetes Werk: |
In: Materials - MDPI AG, 2009, 14(2021), 13, p 3757 |
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Übergeordnetes Werk: |
volume:14 ; year:2021 ; number:13, p 3757 |
Links: |
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DOI / URN: |
10.3390/ma14133757 |
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Katalog-ID: |
DOAJ054845521 |
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520 | |a 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. | ||
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10.3390/ma14133757 doi (DE-627)DOAJ054845521 (DE-599)DOAJ5d521629d4554dea9d12b1c77ac2b0af DE-627 ger DE-627 rakwb eng TK1-9971 TA1-2040 QH201-278.5 QC120-168.85 Marina Zykova verfasserin aut Hybrid Ultra-Low-Radioactive Material for Protecting Dark Matter Detector from Background Neutrons 2021 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier 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. polymethylmethacrylate gadolinium uranium thorium hybrid material inductively coupled plasma mass spectrometry Technology T Electrical engineering. Electronics. Nuclear engineering Engineering (General). Civil engineering (General) Microscopy Descriptive and experimental mechanics Mikhail Grishechkin verfasserin aut Andrew Khomyakov verfasserin aut Elena Mozhevitina verfasserin aut Roman Avetisov verfasserin aut Nadezda Surikova verfasserin aut Maxim Gromov verfasserin aut Alexander Chepurnov verfasserin aut Ivan Nikulin verfasserin aut Igor Avetissov verfasserin aut In Materials MDPI AG, 2009 14(2021), 13, p 3757 (DE-627)595712649 (DE-600)2487261-1 19961944 nnns volume:14 year:2021 number:13, p 3757 https://doi.org/10.3390/ma14133757 kostenfrei https://doaj.org/article/5d521629d4554dea9d12b1c77ac2b0af kostenfrei https://www.mdpi.com/1996-1944/14/13/3757 kostenfrei https://doaj.org/toc/1996-1944 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2119 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 14 2021 13, p 3757 |
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10.3390/ma14133757 doi (DE-627)DOAJ054845521 (DE-599)DOAJ5d521629d4554dea9d12b1c77ac2b0af DE-627 ger DE-627 rakwb eng TK1-9971 TA1-2040 QH201-278.5 QC120-168.85 Marina Zykova verfasserin aut Hybrid Ultra-Low-Radioactive Material for Protecting Dark Matter Detector from Background Neutrons 2021 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier 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. polymethylmethacrylate gadolinium uranium thorium hybrid material inductively coupled plasma mass spectrometry Technology T Electrical engineering. Electronics. Nuclear engineering Engineering (General). Civil engineering (General) Microscopy Descriptive and experimental mechanics Mikhail Grishechkin verfasserin aut Andrew Khomyakov verfasserin aut Elena Mozhevitina verfasserin aut Roman Avetisov verfasserin aut Nadezda Surikova verfasserin aut Maxim Gromov verfasserin aut Alexander Chepurnov verfasserin aut Ivan Nikulin verfasserin aut Igor Avetissov verfasserin aut In Materials MDPI AG, 2009 14(2021), 13, p 3757 (DE-627)595712649 (DE-600)2487261-1 19961944 nnns volume:14 year:2021 number:13, p 3757 https://doi.org/10.3390/ma14133757 kostenfrei https://doaj.org/article/5d521629d4554dea9d12b1c77ac2b0af kostenfrei https://www.mdpi.com/1996-1944/14/13/3757 kostenfrei https://doaj.org/toc/1996-1944 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2119 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 14 2021 13, p 3757 |
allfields_unstemmed |
10.3390/ma14133757 doi (DE-627)DOAJ054845521 (DE-599)DOAJ5d521629d4554dea9d12b1c77ac2b0af DE-627 ger DE-627 rakwb eng TK1-9971 TA1-2040 QH201-278.5 QC120-168.85 Marina Zykova verfasserin aut Hybrid Ultra-Low-Radioactive Material for Protecting Dark Matter Detector from Background Neutrons 2021 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier 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. polymethylmethacrylate gadolinium uranium thorium hybrid material inductively coupled plasma mass spectrometry Technology T Electrical engineering. Electronics. Nuclear engineering Engineering (General). Civil engineering (General) Microscopy Descriptive and experimental mechanics Mikhail Grishechkin verfasserin aut Andrew Khomyakov verfasserin aut Elena Mozhevitina verfasserin aut Roman Avetisov verfasserin aut Nadezda Surikova verfasserin aut Maxim Gromov verfasserin aut Alexander Chepurnov verfasserin aut Ivan Nikulin verfasserin aut Igor Avetissov verfasserin aut In Materials MDPI AG, 2009 14(2021), 13, p 3757 (DE-627)595712649 (DE-600)2487261-1 19961944 nnns volume:14 year:2021 number:13, p 3757 https://doi.org/10.3390/ma14133757 kostenfrei https://doaj.org/article/5d521629d4554dea9d12b1c77ac2b0af kostenfrei https://www.mdpi.com/1996-1944/14/13/3757 kostenfrei https://doaj.org/toc/1996-1944 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2119 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 14 2021 13, p 3757 |
allfieldsGer |
10.3390/ma14133757 doi (DE-627)DOAJ054845521 (DE-599)DOAJ5d521629d4554dea9d12b1c77ac2b0af DE-627 ger DE-627 rakwb eng TK1-9971 TA1-2040 QH201-278.5 QC120-168.85 Marina Zykova verfasserin aut Hybrid Ultra-Low-Radioactive Material for Protecting Dark Matter Detector from Background Neutrons 2021 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier 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. polymethylmethacrylate gadolinium uranium thorium hybrid material inductively coupled plasma mass spectrometry Technology T Electrical engineering. Electronics. Nuclear engineering Engineering (General). Civil engineering (General) Microscopy Descriptive and experimental mechanics Mikhail Grishechkin verfasserin aut Andrew Khomyakov verfasserin aut Elena Mozhevitina verfasserin aut Roman Avetisov verfasserin aut Nadezda Surikova verfasserin aut Maxim Gromov verfasserin aut Alexander Chepurnov verfasserin aut Ivan Nikulin verfasserin aut Igor Avetissov verfasserin aut In Materials MDPI AG, 2009 14(2021), 13, p 3757 (DE-627)595712649 (DE-600)2487261-1 19961944 nnns volume:14 year:2021 number:13, p 3757 https://doi.org/10.3390/ma14133757 kostenfrei https://doaj.org/article/5d521629d4554dea9d12b1c77ac2b0af kostenfrei https://www.mdpi.com/1996-1944/14/13/3757 kostenfrei https://doaj.org/toc/1996-1944 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2119 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 14 2021 13, p 3757 |
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10.3390/ma14133757 doi (DE-627)DOAJ054845521 (DE-599)DOAJ5d521629d4554dea9d12b1c77ac2b0af DE-627 ger DE-627 rakwb eng TK1-9971 TA1-2040 QH201-278.5 QC120-168.85 Marina Zykova verfasserin aut Hybrid Ultra-Low-Radioactive Material for Protecting Dark Matter Detector from Background Neutrons 2021 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier 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. polymethylmethacrylate gadolinium uranium thorium hybrid material inductively coupled plasma mass spectrometry Technology T Electrical engineering. Electronics. Nuclear engineering Engineering (General). Civil engineering (General) Microscopy Descriptive and experimental mechanics Mikhail Grishechkin verfasserin aut Andrew Khomyakov verfasserin aut Elena Mozhevitina verfasserin aut Roman Avetisov verfasserin aut Nadezda Surikova verfasserin aut Maxim Gromov verfasserin aut Alexander Chepurnov verfasserin aut Ivan Nikulin verfasserin aut Igor Avetissov verfasserin aut In Materials MDPI AG, 2009 14(2021), 13, p 3757 (DE-627)595712649 (DE-600)2487261-1 19961944 nnns volume:14 year:2021 number:13, p 3757 https://doi.org/10.3390/ma14133757 kostenfrei https://doaj.org/article/5d521629d4554dea9d12b1c77ac2b0af kostenfrei https://www.mdpi.com/1996-1944/14/13/3757 kostenfrei https://doaj.org/toc/1996-1944 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2119 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 14 2021 13, p 3757 |
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TK1-9971 TA1-2040 QH201-278.5 QC120-168.85 Hybrid Ultra-Low-Radioactive Material for Protecting Dark Matter Detector from Background Neutrons polymethylmethacrylate gadolinium uranium thorium hybrid material inductively coupled plasma mass spectrometry |
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Hybrid Ultra-Low-Radioactive Material for Protecting Dark Matter Detector from Background Neutrons |
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Hybrid Ultra-Low-Radioactive Material for Protecting Dark Matter Detector from Background Neutrons |
abstract |
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. |
abstractGer |
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. |
abstract_unstemmed |
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. |
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