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Barra G, Guadagno L, Raimondo M, Santonicola MG, Toto E, Vecchio Ciprioti S. A Comprehensive Review on the Thermal Stability Assessment of Polymers and Composites for Aeronautics and Space Applications. Polymers (Basel) 2023; 15:3786. [PMID: 37765641 PMCID: PMC10535285 DOI: 10.3390/polym15183786] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 09/10/2023] [Accepted: 09/14/2023] [Indexed: 09/29/2023] Open
Abstract
This review article provides an exhaustive survey on experimental investigations regarding the thermal stability assessment of polymers and polymer-based composites intended for applications in the aeronautical and space fields. This review aims to: (1) come up with a systematic and critical overview of the state-of-the-art knowledge and research on the thermal stability of various polymers and composites, such as polyimides, epoxy composites, and carbon-filled composites; (2) identify the key factors, mechanisms, methods, and challenges that affect the thermal stability of polymers and composites, such as the temperature, radiation, oxygen, and degradation; (3) highlight the current and potential applications, benefits, limitations, and opportunities of polymers and composites with high thermal stability, such as thermal control, structural reinforcement, protection, and energy conversion; (4) give a glimpse of future research directions by providing indications for improving the thermal stability of polymers and composites, such as novel materials, hybrid composites, smart materials, and advanced processing methods. In this context, thermal analysis plays a crucial role in the development of polyimide-based materials for the radiation shielding of space solar cells or spacecraft components. The main strategies that have been explored to improve the processability, optical transparency, and radiation resistance of polyimide-based materials without compromising their thermal stability are highlighted. The combination of different types of polyimides, such as linear and hyperbranched, as well as the incorporation of bulky pendant groups, are reported as routes for improving the mechanical behavior and optical transparency while retaining the thermal stability and radiation shielding properties. Furthermore, the thermal stability of polymer/carbon nanocomposites is discussed with particular reference to the role of the filler in radiation monitoring systems and electromagnetic interference shielding in the space environment. Finally, the thermal stability of epoxy-based composites and how it is influenced by the type and content of epoxy resin, curing agent, degree of cross-linking, and the addition of fillers or modifiers are critically reviewed. Some studies have reported that incorporating mesoporous silica micro-filler or microencapsulated phase change materials (MPCM) into epoxy resin can enhance its thermal stability and mechanical properties. The mesoporous silica composite exhibited the highest glass transition temperature and activation energy for thermal degradation among all the epoxy-silica nano/micro-composites. Indeed, an average activation energy value of 148.86 kJ/mol was recorded for the thermal degradation of unfilled epoxy resin. The maximum activation energy range was instead recorded for composites loaded with mesoporous microsilica. The EMC-5p50 sample showed the highest mean value of 217.6 kJ/mol. This remarkable enhancement was ascribed to the polymer invading the silica pores and forging formidable interfacial bonds.
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Affiliation(s)
- Giuseppina Barra
- Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy; (G.B.); (L.G.)
| | - Liberata Guadagno
- Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy; (G.B.); (L.G.)
| | - Marialuigia Raimondo
- Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy; (G.B.); (L.G.)
| | - Maria Gabriella Santonicola
- Department of Chemical Engineering Materials Environment, Sapienza University of Rome, Via del Castro Laurenziano 7, 00161 Rome, Italy;
| | - Elisa Toto
- Department of Chemical Engineering Materials Environment, Sapienza University of Rome, Via del Castro Laurenziano 7, 00161 Rome, Italy;
| | - Stefano Vecchio Ciprioti
- Department of Basic and Applied Science for Engineering, Sapienza University of Rome, Via del Castro Laurenziano 7, 00161 Rome, Italy
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Babu B, Pawar S, Mittal A, Kolanthai E, Neal CJ, Coathup M, Seal S. Nanotechnology enabled radioprotectants to reduce space radiation-induced reactive oxidative species. WILEY INTERDISCIPLINARY REVIEWS. NANOMEDICINE AND NANOBIOTECHNOLOGY 2023; 15:e1896. [PMID: 37190884 DOI: 10.1002/wnan.1896] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 04/04/2023] [Accepted: 04/18/2023] [Indexed: 05/17/2023]
Abstract
Interest in space exploration has seen substantial growth following recent launch and operation of modern space technologies. In particular, the possibility of travel beyond low earth orbit is seeing sustained support. However, future deep space travel requires addressing health concerns for crews under continuous, longer-term exposure to adverse environmental conditions. Among these challenges, radiation-induced health issues are a major concern. Their potential to induce chronic illness is further potentiated by the microgravity environment. While investigations into the physiological effects of space radiation are still under investigation, studies on model ionizing radiation conditions, in earth and micro-gravity conditions, can provide needed insight into relevant processes. Substantial formation of high, sustained reactive oxygen species (ROS) evolution during radiation exposure is a clear threat to physiological health of space travelers, producing indirect damage to various cell structures and requiring therapeutic address. Radioprotection toward the skeletal system components is essential to astronaut health, due to the high radio-absorption cross-section of bone mineral and local hematopoiesis. Nanotechnology can potentially function as radioprotectant and radiomitigating agents toward ROS and direct radiation damage. Nanoparticle compositions such as gold, silver, platinum, carbon-based materials, silica, transition metal dichalcogenides, and ceria have all shown potential as viable radioprotectants to mitigate space radiation effects with nanoceria further showing the ability to protect genetic material from oxidative damage in several studies. As research into space radiation-induced health problems develops, this review intends to provide insights into the nanomaterial design to ameliorate pathological effects from ionizing radiation exposure. This article is categorized under: Therapeutic Approaches and Drug Discovery > Emerging Technologies Nanotechnology Approaches to Biology > Nanoscale Systems in Biology Nanotechnology Approaches to Biology > Cells at the Nanoscale Therapeutic Approaches and Drug Discovery > Nanomedicine for Oncologic Disease.
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Affiliation(s)
- Balaashwin Babu
- Advanced Materials Processing and Analysis Center, Department of Materials Science and Engineering, University of Central Florida, Orlando, Florida, USA
- Nanoscience Technology Center, University of Central Florida, Orlando, Florida, USA
| | - Shreya Pawar
- Advanced Materials Processing and Analysis Center, Department of Materials Science and Engineering, University of Central Florida, Orlando, Florida, USA
- Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, Florida, USA
| | - Agastya Mittal
- Advanced Materials Processing and Analysis Center, Department of Materials Science and Engineering, University of Central Florida, Orlando, Florida, USA
- Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, Florida, USA
| | - Elayaraja Kolanthai
- Advanced Materials Processing and Analysis Center, Department of Materials Science and Engineering, University of Central Florida, Orlando, Florida, USA
| | - Craig J Neal
- Advanced Materials Processing and Analysis Center, Department of Materials Science and Engineering, University of Central Florida, Orlando, Florida, USA
| | - Melanie Coathup
- Advanced Materials Processing and Analysis Center, Department of Materials Science and Engineering, University of Central Florida, Orlando, Florida, USA
| | - Sudipta Seal
- Advanced Materials Processing and Analysis Center, Department of Materials Science and Engineering, University of Central Florida, Orlando, Florida, USA
- College of Medicine, Nanoscience Technology Center, University of Central Florida, Orlando, Florida, USA
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Kumar A, Kumar N. Advances in transparent polymer nanocomposites and their applications: A comprehensive review. POLYM-PLAST TECH MAT 2022. [DOI: 10.1080/25740881.2022.2029892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Affiliation(s)
- Atish Kumar
- Department of Industrial and Production Engineering, DR. B. R. Ambedkar National Institute of Technology, Jalandhar, India
| | - Narendra Kumar
- Department of Industrial and Production Engineering, DR. B. R. Ambedkar National Institute of Technology, Jalandhar, India
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He H, Liu Q, Zhang SD, Chen HB. Fabrication and Properties of Polyimide/Carbon Fiber Aerogel and the Derivative Carbon Aerogel. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.1c04654] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hao He
- College of Mechanical and Automotive, South China University of Technology, Guangzhou, Guangdong 510640, China
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621000, China
| | - Qiang Liu
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621000, China
| | - Shui-Dong Zhang
- College of Mechanical and Automotive, South China University of Technology, Guangzhou, Guangdong 510640, China
| | - Hong-Bing Chen
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621000, China
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Wei XY, He ZB, Yuan SQ, Wu H, Zhi XX, Zhang Y, Chen SJ, Liu JG. Enhancement of Ultraviolet Light Resistance of Colorless and Transparent Semi-Alicyclic Polyimide Nanocomposite Films via the Incorporation of Hindered Amine Light Stabilizers for Potential Applications in Flexible Optoelectronics. Polymers (Basel) 2022; 14:polym14061091. [PMID: 35335422 PMCID: PMC8949897 DOI: 10.3390/polym14061091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Revised: 03/07/2022] [Accepted: 03/07/2022] [Indexed: 11/16/2022] Open
Abstract
Optically transparent polymer films with excellent thermal and ultraviolet (UV) resistance have been highly desired in advanced optoelectronic fields, such as flexible substrates for photovoltaic devices. Colorless and transparent polyimide (CPI) films simultaneously possess the good thermal stability and optical transparency. However, conventional CPI films usually suffered from the UV exposure and have to face the deterioration of optical properties during the long-term service in UV environments. In the current work, the commercially available hindered amine light stabilizers (HALS) were tried to be incorporated into the semi-alicyclic CPI matrix with the aim of enhancing the UV exposure stability. For this target, a CPI-0 film was first prepared from hydrogenated pyromellitic dianhydride (HPMDA) and 2,2'-dimethylbenzidine (DMBZ) via a one-step polycondensation procedure. Then, the commercially available HALS were incorporated into the CPI-0 (HPMDA-DMBZ) film matrix to afford four series of CPI/HALS composite films. Experimental results indicated that the Tinuvin® 791 HALS showed the best miscibility with the CPI-0 film matrix and the derived CPI-D series of composite films exhibited the best optical transmittances. The CPI-D nanocomposite films showed apparently enhanced UV exposure stability via incorporation of the 791 additives. For the pristine CPI-0 film, after the UV exposure for 6 h, the optical properties, including the transmittance at the wavelength of 350 nm (T350), lightness (L*), yellow indices (b*), and haze obviously deteriorated with the T350 values from 55.7% to 17.5%, the L* values from 95.12 to 91.38, the b* values from 3.38 to 21.95, and the haze values from 1.46% to 9.33%. However, for the CPI-D-10 film (791: CPI-0 = 1.0 wt%, weight percent), the optical parameters were highly maintained with the T350 values from 61.4% to 53.8%, the L* values from 95.46 to 95.36, the b* values from 1.84 to 1.51, and the haze values from 0.69% to 3.34% under the same UV aging conditions.
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Affiliation(s)
- Xin-Ying Wei
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (X.-Y.W.); (H.W.); (X.-X.Z.); (Y.Z.)
| | - Zhi-Bin He
- RAYITEK Hi-Tech Film Co., Ltd., Shenzhen 518105, China; (Z.-B.H.); (S.-Q.Y.)
| | - Shun-Qi Yuan
- RAYITEK Hi-Tech Film Co., Ltd., Shenzhen 518105, China; (Z.-B.H.); (S.-Q.Y.)
| | - Hao Wu
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (X.-Y.W.); (H.W.); (X.-X.Z.); (Y.Z.)
| | - Xin-Xin Zhi
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (X.-Y.W.); (H.W.); (X.-X.Z.); (Y.Z.)
| | - Yan Zhang
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (X.-Y.W.); (H.W.); (X.-X.Z.); (Y.Z.)
| | - Shu-Jing Chen
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (X.-Y.W.); (H.W.); (X.-X.Z.); (Y.Z.)
- Correspondence: (S.-J.C.); (J.-G.L.); Tel.: +86-10-8232-2972 (J.-G.L.)
| | - Jin-Gang Liu
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (X.-Y.W.); (H.W.); (X.-X.Z.); (Y.Z.)
- Correspondence: (S.-J.C.); (J.-G.L.); Tel.: +86-10-8232-2972 (J.-G.L.)
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Huang J, Chen H, Zhang G, Fan X, Liu J. The Effect of Silane Coupling Agent on the Texture and Properties of In Situ Synthesized PI/SiO2 Nanocomposite Film. NANOMATERIALS 2022; 12:nano12020286. [PMID: 35055302 PMCID: PMC8778991 DOI: 10.3390/nano12020286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 12/31/2021] [Accepted: 01/13/2022] [Indexed: 11/16/2022]
Abstract
PI/SiO2 composite films have been prepared by using in situ polymerization. The influences of the dosage of silane coupling agent (KH-560) on the structure and performance of PI/SiO2 composite film have been investigated. The results show that in the components without KH-560, the addition of SiO2 decreases the transmittance of the sample. Compared to the same SiO2 doping amount, the transmittance in the visible light range of the sample using KH-560 is higher than that of the sample without KH-560. After adding KH-560, the tensile strength, the elastic modulus the elongation at break of the sample have largely changed. The thermal stability and the ability to resist ultraviolet radiation of the composite film first increases and then decreases. Furthermore, the optimal dosage of KH-560 is 3%. Moreover, the addition of KH-560 has little effect on the transmittance of the PI/SiO2 composite films before and after UV irradiation.
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Affiliation(s)
- Jindong Huang
- School of Materials Science and Engineering, Tiangong University, Tianjin 300387, China; (J.H.); (H.C.); (G.Z.); (X.F.)
- School of Physical Science and Technology, Tiangong University, Tianjin 300387, China
| | - Hong Chen
- School of Materials Science and Engineering, Tiangong University, Tianjin 300387, China; (J.H.); (H.C.); (G.Z.); (X.F.)
| | - Guanglu Zhang
- School of Materials Science and Engineering, Tiangong University, Tianjin 300387, China; (J.H.); (H.C.); (G.Z.); (X.F.)
- School of Physical Science and Technology, Tiangong University, Tianjin 300387, China
| | - Xiaowei Fan
- School of Materials Science and Engineering, Tiangong University, Tianjin 300387, China; (J.H.); (H.C.); (G.Z.); (X.F.)
- Tianjin SYP Engineering Glass Co., Ltd., Tianjin 300402, China
| | - Juncheng Liu
- School of Materials Science and Engineering, Tiangong University, Tianjin 300387, China; (J.H.); (H.C.); (G.Z.); (X.F.)
- Correspondence: ; Tel.: +86-(0)-22-83-955-811
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Nabiyev AA, Olejniczak A, Islamov AK, Pawlukojc A, Ivankov OI, Balasoiu M, Zhigunov A, Nuriyev MA, Guliyev FM, Soloviov DV, Azhibekov AK, Doroshkevich AS, Ivanshina OY, Kuklin AI. Composite Films of HDPE with SiO 2 and ZrO 2 Nanoparticles: The Structure and Interfacial Effects. NANOMATERIALS 2021; 11:nano11102673. [PMID: 34685114 PMCID: PMC8539266 DOI: 10.3390/nano11102673] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 09/21/2021] [Accepted: 09/28/2021] [Indexed: 12/26/2022]
Abstract
Herein, we investigated the influence of two types of nanoparticle fillers, i.e., amorphous SiO2 and crystalline ZrO2, on the structural properties of their nanocomposites with high-density polyethylene (HDPE). The composite films were prepared by melt-blending with a filler content that varied from 1% to 20% v/v. The composites were characterized by small- and wide-angle x-ray scattering (SAXS and WAXS), small-angle neutron scattering (SANS), Raman spectroscopy, differential scanning calorimetry (DSC), and scanning electron microscopy (SEM). For both fillers, the nanoaggregates were evenly distributed in the polymer matrix and their initial state in the powders determined their surface roughness and fractal character. In the case of the nano-ZrO2 filler, the lamellar thickness and crystallinity degree remain unchanged over a broad range of filler concentrations. SANS and SEM investigation showed poor interfacial adhesion and the presence of voids in the interfacial region. Temperature-programmed SANS investigations showed that at elevated temperatures, these voids become filled due to the flipping motions of polymer chains. The effect was accompanied by a partial aggregation of the filler. For nano-SiO2 filler, the lamellar thickness and the degree of crystallinity increased with increasing the filler loading. SAXS measurements show that the ordering of the lamellae is disrupted even at a filler content of only a few percent. SEM images confirmed good interfacial adhesion and integrity of the SiO2/HDPE composite. This markedly different impact of both fillers on the composite structure is discussed in terms of nanoparticle surface properties and their affinity to the HDPE matrix.
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Affiliation(s)
- Asif A. Nabiyev
- ANAS Institute of Radiation Problems, Baku AZ1143, Azerbaijan;
- Joint Institute for Nuclear Research, 141980 Dubna, Russia; (A.O.); (A.K.I.); (A.P.); (O.I.I.); (M.B.); (D.V.S.); (A.K.A.); (A.S.D.); (O.Y.I.); (A.I.K.)
- Correspondence: ; Tel.: +7-(496)-21-66-275
| | - Andrzej Olejniczak
- Joint Institute for Nuclear Research, 141980 Dubna, Russia; (A.O.); (A.K.I.); (A.P.); (O.I.I.); (M.B.); (D.V.S.); (A.K.A.); (A.S.D.); (O.Y.I.); (A.I.K.)
- Faculty of Chemistry, Nicolaus Copernicus University, 87-100 Torun, Poland
| | - Akhmed Kh. Islamov
- Joint Institute for Nuclear Research, 141980 Dubna, Russia; (A.O.); (A.K.I.); (A.P.); (O.I.I.); (M.B.); (D.V.S.); (A.K.A.); (A.S.D.); (O.Y.I.); (A.I.K.)
| | - Andrzej Pawlukojc
- Joint Institute for Nuclear Research, 141980 Dubna, Russia; (A.O.); (A.K.I.); (A.P.); (O.I.I.); (M.B.); (D.V.S.); (A.K.A.); (A.S.D.); (O.Y.I.); (A.I.K.)
- Institute of Nuclear Chemistry and Technology, 03-195 Warsaw, Poland
| | - Oleksandr I. Ivankov
- Joint Institute for Nuclear Research, 141980 Dubna, Russia; (A.O.); (A.K.I.); (A.P.); (O.I.I.); (M.B.); (D.V.S.); (A.K.A.); (A.S.D.); (O.Y.I.); (A.I.K.)
- Institute for Safety Problems of Nuclear Power Plants NAS of Ukraine, 07270 Kiev, Ukraine
- Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia
| | - Maria Balasoiu
- Joint Institute for Nuclear Research, 141980 Dubna, Russia; (A.O.); (A.K.I.); (A.P.); (O.I.I.); (M.B.); (D.V.S.); (A.K.A.); (A.S.D.); (O.Y.I.); (A.I.K.)
- Horia Hulubei National Institute of Physics and Nuclear Engineering, P.O. Box MG-6, RO-077125 Bucharest-Magurele, Romania
| | - Alexander Zhigunov
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, CZ-162 06 Praha, Czech Republic;
| | - Musa A. Nuriyev
- ANAS Institute of Radiation Problems, Baku AZ1143, Azerbaijan;
| | - Fovzi M. Guliyev
- Faculty of Civil Engineering, Azerbaijan University of Architecture and Construction, Baku AZ1073, Azerbaijan;
| | - Dmytro V. Soloviov
- Joint Institute for Nuclear Research, 141980 Dubna, Russia; (A.O.); (A.K.I.); (A.P.); (O.I.I.); (M.B.); (D.V.S.); (A.K.A.); (A.S.D.); (O.Y.I.); (A.I.K.)
- Institute for Safety Problems of Nuclear Power Plants NAS of Ukraine, 07270 Kiev, Ukraine
- Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia
| | - Aidos K. Azhibekov
- Joint Institute for Nuclear Research, 141980 Dubna, Russia; (A.O.); (A.K.I.); (A.P.); (O.I.I.); (M.B.); (D.V.S.); (A.K.A.); (A.S.D.); (O.Y.I.); (A.I.K.)
- Institute of Natural Science, Korkyt Ata Kyzylorda University, Kyzylorda 120001, Kazakhstan
- The Institute of Nuclear Physics, Ministry of Energy, Almaty 050032, Kazakhstan
| | - Alexander S. Doroshkevich
- Joint Institute for Nuclear Research, 141980 Dubna, Russia; (A.O.); (A.K.I.); (A.P.); (O.I.I.); (M.B.); (D.V.S.); (A.K.A.); (A.S.D.); (O.Y.I.); (A.I.K.)
- Donetsk Institute for Physics and Engineering Named after O.O. Galkin NAS of Ukraine, 03028 Kiev, Ukraine
| | - Olga Yu. Ivanshina
- Joint Institute for Nuclear Research, 141980 Dubna, Russia; (A.O.); (A.K.I.); (A.P.); (O.I.I.); (M.B.); (D.V.S.); (A.K.A.); (A.S.D.); (O.Y.I.); (A.I.K.)
| | - Alexander I. Kuklin
- Joint Institute for Nuclear Research, 141980 Dubna, Russia; (A.O.); (A.K.I.); (A.P.); (O.I.I.); (M.B.); (D.V.S.); (A.K.A.); (A.S.D.); (O.Y.I.); (A.I.K.)
- Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia
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