J. Tobin, S. Yu, R. Qiao, Wanli Yang, C. Booth, D. Shuh
The experimentally measured F K (1s) X-ray Emission from a Uranium Tetrafluoride sample is presented and discussed, including comparison to the results of an earlier cluster calculation by Ryzhkov and coworkers. It is shown that the F K (1s) spectrum is dominated by emission from the bulk UF4, but a small secondary peak can be associated with the Uranyl Fluoride produced during surface degradation.
提出并讨论了实验测量的四氟化铀样品的F K (1s) x射线发射，包括与Ryzhkov及其同事早先的聚类计算结果的比较。结果表明，fk (1s)光谱主要由大块UF4的发射主导，但一个小的次峰可能与表面降解过程中产生的铀酰氟有关。
{"title":"F1s X-ray emission spectroscopy of UF4","authors":"J. Tobin, S. Yu, R. Qiao, Wanli Yang, C. Booth, D. Shuh","doi":"10.15669/PNST.5.90","DOIUrl":"https://doi.org/10.15669/PNST.5.90","url":null,"abstract":"The experimentally measured F K (1s) X-ray Emission from a Uranium Tetrafluoride sample is presented and discussed, including comparison to the results of an earlier cluster calculation by Ryzhkov and coworkers. It is shown that the F K (1s) spectrum is dominated by emission from the bulk UF4, but a small secondary peak can be associated with the Uranyl Fluoride produced during surface degradation.","PeriodicalId":20706,"journal":{"name":"Progress in Nuclear Science and Technology","volume":"630 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74731794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Anomalous hall effect in a triangular-lattice antiferromagnet UNi4B","authors":"A. Oyamada, Takao Inohara, E. Yamamoto, Y. Haga","doi":"10.15669/PNST.5.128","DOIUrl":"https://doi.org/10.15669/PNST.5.128","url":null,"abstract":"","PeriodicalId":20706,"journal":{"name":"Progress in Nuclear Science and Technology","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83374743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Richard J. Wilbraham, N. Rauff-Nisthar, C. Boxall, E. Howett, D. Hambley, Zoltán Hiezl, William E Lee, C. Padovani
Analysis of advanced gas-cooled reactor (AGR) simulated used nuclear fuels (SIMFuels) has been carried out using micro-Raman spectroscopy in order to understand the effect lanthanide species (e.g. Nd, Y, Ce), representative of fission products generated during fuel burnup, have on the structure of the UO2 matrix in spent AGR fuel. Results show a decrease in perfect fluorite character with increasing burnup as well as the development of a broad lattice distortion peak between 500 and 650 cm-1. Peak analysis of this broad band reveals in it comprised of three overlapping peaks at 534 cm-1, 574 cm-1 and 624 cm-1. The peak at 534 cm-1 has been examined and is suggested to be due to a local phonon mode associated with oxygen-vacancy-induced lattice distortion as a result of lanthanide 3+ ion incorporation into the UO2 bulk matrix.
{"title":"Raman studies of advanced gas-cooled reactor simulated spent nuclear fuels","authors":"Richard J. Wilbraham, N. Rauff-Nisthar, C. Boxall, E. Howett, D. Hambley, Zoltán Hiezl, William E Lee, C. Padovani","doi":"10.15669/PNST.5.213","DOIUrl":"https://doi.org/10.15669/PNST.5.213","url":null,"abstract":"Analysis of advanced gas-cooled reactor (AGR) simulated used nuclear fuels (SIMFuels) has been carried out using micro-Raman spectroscopy in order to understand the effect lanthanide species (e.g. Nd, Y, Ce), representative of fission products generated during fuel burnup, have on the structure of the UO2 matrix in spent AGR fuel. Results show a decrease in perfect fluorite character with increasing burnup as well as the development of a broad lattice distortion peak between 500 and 650 cm-1. Peak analysis of this broad band reveals in it comprised of three overlapping peaks at 534 cm-1, 574 cm-1 and 624 cm-1. The peak at 534 cm-1 has been examined and is suggested to be due to a local phonon mode associated with oxygen-vacancy-induced lattice distortion as a result of lanthanide 3+ ion incorporation into the UO2 bulk matrix.","PeriodicalId":20706,"journal":{"name":"Progress in Nuclear Science and Technology","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88427338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K. Ohashi, Masaki Sawabu, K. Maeta, M. Ohashi, T. Yamamura
We attempted to grow UNiX2 ternary compounds by the arc melting method. UNiC2 and UNiGe2 may not melt congruently because both compounds contain impurity phases. UNiC2 crystallizes into the tetragonal UCoC2-type structure with space group P4/nmm, the annealed sample consists of UNiC2 and U2NiC3 as the main and secondary phases, respectively. The lattice constants were obtained to be a = 3.512 Å, c = 7.339 Å. UNiGe2 also contains two phases. We assumed that primary phase is isostructural to UNiSi2 that crystallizes into the orthorhombic CeNiSi2-type structure with the space group of Cmcm. On the other hand, it is reasonable to assume that UNi2Ge2 exists in the compound as secondary phase. The unit cell volume tends to increase as increasing the anomic number of X (C, Si, Ge). It comes from the fact that the atomic radius of X becomes larger as the atomic number becomes larger.
{"title":"Systematic study of the UNiX2 ternary compounds (X=C, Si, Ge)","authors":"K. Ohashi, Masaki Sawabu, K. Maeta, M. Ohashi, T. Yamamura","doi":"10.15669/PNST.5.116","DOIUrl":"https://doi.org/10.15669/PNST.5.116","url":null,"abstract":"We attempted to grow UNiX2 ternary compounds by the arc melting method. UNiC2 and UNiGe2 may not melt congruently because both compounds contain impurity phases. UNiC2 crystallizes into the tetragonal UCoC2-type structure with space group P4/nmm, the annealed sample consists of UNiC2 and U2NiC3 as the main and secondary phases, respectively. The lattice constants were obtained to be a = 3.512 Å, c = 7.339 Å. UNiGe2 also contains two phases. We assumed that primary phase is isostructural to UNiSi2 that crystallizes into the orthorhombic CeNiSi2-type structure with the space group of Cmcm. On the other hand, it is reasonable to assume that UNi2Ge2 exists in the compound as secondary phase. The unit cell volume tends to increase as increasing the anomic number of X (C, Si, Ge). It comes from the fact that the atomic radius of X becomes larger as the atomic number becomes larger.","PeriodicalId":20706,"journal":{"name":"Progress in Nuclear Science and Technology","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87778443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
At the Fukushima Daiichi nuclear power station, spent zeolite used to remove radionuclides from contaminated water will be disposed of as the secondary wastes of water treatment. To estimate radionuclides inventory in the spent zeolite, sorption ability of radionuclides needs to be investigated. In this study, distribution coefficients (Kd) of U and Np on chabazite, which is the zeolite used in the second cesium adsorption apparatus (SARRY), were obtained by batch sorption experiments. The obtained Kd of U was 0.0021 m/kg in simulated seawater, while the Kd was 0.68 m/kg in simulated seawater diluted ten times by deionized water. On the other hand, the Kd of Np was 0.0085-0.0087 m/kg and independent of seawater concentration. From the experiments as functions of Na, carbonate concentrations and pH, the Kd of U was found to be strongly affected by carbonate concentration in the pH range 8-9, while both Na and carbonate concentrations had little effect on the Kd of Np.
{"title":"Sorption behavior of U and Np on zeolite","authors":"T. Ishidera, Y. Tachi, Y. Akagi, T. Ashida","doi":"10.15669/PNST.5.221","DOIUrl":"https://doi.org/10.15669/PNST.5.221","url":null,"abstract":"At the Fukushima Daiichi nuclear power station, spent zeolite used to remove radionuclides from contaminated water will be disposed of as the secondary wastes of water treatment. To estimate radionuclides inventory in the spent zeolite, sorption ability of radionuclides needs to be investigated. In this study, distribution coefficients (Kd) of U and Np on chabazite, which is the zeolite used in the second cesium adsorption apparatus (SARRY), were obtained by batch sorption experiments. The obtained Kd of U was 0.0021 m/kg in simulated seawater, while the Kd was 0.68 m/kg in simulated seawater diluted ten times by deionized water. On the other hand, the Kd of Np was 0.0085-0.0087 m/kg and independent of seawater concentration. From the experiments as functions of Na, carbonate concentrations and pH, the Kd of U was found to be strongly affected by carbonate concentration in the pH range 8-9, while both Na and carbonate concentrations had little effect on the Kd of Np.","PeriodicalId":20706,"journal":{"name":"Progress in Nuclear Science and Technology","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82585228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Many researchers have studied physical properties of U compounds theoretically [1, 2] and experimentally [3]. Moriya, Kawabata, and Takahashi developed the self-consistent renormalization theory of spin fluctuations (the SCR theory) that takes into account mode-mode couplings of spin fluctuations beyond the random phase approximation self-consistently [1]. 5f electrons of U ions in U compounds are more localized than 3d electrons of transition metal compounds and less localized than 4f electrons of Ce compounds. As the first starting point, we use the localized paramagnon model in the SCR theory where the damping constant of spin fluctuations is independent of wave numbers. Konno and Moriya examined specific heats of U compounds based on the localized paramagnon model [2]. This model is valid in UPt3 and UAl2. Their theory explained the specific heat experimental data qualitatively. Although it was experimentally reported that the short range antiferromagnetic correlation was important [3], the localized paramagnon model can consider both the nearly ferromagnetic and nearly antiferromagnetic metals because the damping constant is independent of wave numbers. We feel that thermal expansion in U compounds has not been understood theoretically. We investigate thermal expansion based on the localized paramagnon model. By using Takahashi’s method [1] thermal expansion is obtained. Whether the behavior of the specific heat is consistent with that of the thermal expansion coefficient is discussed. This paper is organized. In the next section the formulation will be provided. In section 3 the numerical results will be shown. In the last section the conclusion will be provided.
{"title":"Theory of thermal expansion based on the localized paramagnon model","authors":"R. Konno, N. Hatayama, Y. Takahashi","doi":"10.15669/PNST.5.94","DOIUrl":"https://doi.org/10.15669/PNST.5.94","url":null,"abstract":"Many researchers have studied physical properties of U compounds theoretically [1, 2] and experimentally [3]. Moriya, Kawabata, and Takahashi developed the self-consistent renormalization theory of spin fluctuations (the SCR theory) that takes into account mode-mode couplings of spin fluctuations beyond the random phase approximation self-consistently [1]. 5f electrons of U ions in U compounds are more localized than 3d electrons of transition metal compounds and less localized than 4f electrons of Ce compounds. As the first starting point, we use the localized paramagnon model in the SCR theory where the damping constant of spin fluctuations is independent of wave numbers. Konno and Moriya examined specific heats of U compounds based on the localized paramagnon model [2]. This model is valid in UPt3 and UAl2. Their theory explained the specific heat experimental data qualitatively. Although it was experimentally reported that the short range antiferromagnetic correlation was important [3], the localized paramagnon model can consider both the nearly ferromagnetic and nearly antiferromagnetic metals because the damping constant is independent of wave numbers. We feel that thermal expansion in U compounds has not been understood theoretically. We investigate thermal expansion based on the localized paramagnon model. By using Takahashi’s method [1] thermal expansion is obtained. Whether the behavior of the specific heat is consistent with that of the thermal expansion coefficient is discussed. This paper is organized. In the next section the formulation will be provided. In section 3 the numerical results will be shown. In the last section the conclusion will be provided.","PeriodicalId":20706,"journal":{"name":"Progress in Nuclear Science and Technology","volume":"35 8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82800284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Effects of atmospheres on the vaporization behavior of Cs chemisorbed compound CsFeSiO4 was experimentally investigated. A pure CsFeSiO4 sample was synthesized by a powder metallurgical route and was subjected to the thermogravimetric analysis. Weight loss of CsFeSiO4 was larger in the order of those under Ar-5 %H2 and Ar-5 %H2O-5 %H2, Ar-5 %H2O, Ar and air. This would correspond to the varied vapor pressures of CsFeSiO4 by different oxygen potentials in the atmospheres. On the other hand, larger weight losses under H2 containing atmospheres were observed regardless of the oxygen potential. An X-ray diffraction analysis and a chemical equilibrium calculation have indicated the possible decomposition of CsFeSiO4 by the interaction with H2 in the vapor phase.
{"title":"Effect of atmosphere on the vaporization behavior of CsFeSiO4","authors":"E. Suzuki, K. Nakajima, M. Osaka","doi":"10.15669/PNST.5.165","DOIUrl":"https://doi.org/10.15669/PNST.5.165","url":null,"abstract":"Effects of atmospheres on the vaporization behavior of Cs chemisorbed compound CsFeSiO4 was experimentally investigated. A pure CsFeSiO4 sample was synthesized by a powder metallurgical route and was subjected to the thermogravimetric analysis. Weight loss of CsFeSiO4 was larger in the order of those under Ar-5 %H2 and Ar-5 %H2O-5 %H2, Ar-5 %H2O, Ar and air. This would correspond to the varied vapor pressures of CsFeSiO4 by different oxygen potentials in the atmospheres. On the other hand, larger weight losses under H2 containing atmospheres were observed regardless of the oxygen potential. An X-ray diffraction analysis and a chemical equilibrium calculation have indicated the possible decomposition of CsFeSiO4 by the interaction with H2 in the vapor phase.","PeriodicalId":20706,"journal":{"name":"Progress in Nuclear Science and Technology","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90569869","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jeongmook Lee, Jandee Kim, Young‐Sang Youn, Jong‐Yun Kim, S. Lim
The surface structures of (U,Nd)O2 pellets were characterized by using Raman spectroscopy to study the influence of trivalent-dopant on a UO2 surface lattice. The stoichiometry of each sample pellet was confirmed by analyzing the lattice parameter calculated from X-ray diffraction spectra. Raman spectra of the sample pellets showed the defect structures related to oxygen vacancies. The concentration of oxygen vacancies in (U,Nd)O2 pellets is affected by the Nd doping level.
{"title":"Surface characterization of (U,Nd)O2: the influence of trivalent-dopant on structure of UO2","authors":"Jeongmook Lee, Jandee Kim, Young‐Sang Youn, Jong‐Yun Kim, S. Lim","doi":"10.15669/PNST.5.33","DOIUrl":"https://doi.org/10.15669/PNST.5.33","url":null,"abstract":"The surface structures of (U,Nd)O2 pellets were characterized by using Raman spectroscopy to study the influence of trivalent-dopant on a UO2 surface lattice. The stoichiometry of each sample pellet was confirmed by analyzing the lattice parameter calculated from X-ray diffraction spectra. Raman spectra of the sample pellets showed the defect structures related to oxygen vacancies. The concentration of oxygen vacancies in (U,Nd)O2 pellets is affected by the Nd doping level.","PeriodicalId":20706,"journal":{"name":"Progress in Nuclear Science and Technology","volume":"82 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73060775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Yamaguchi, Hiroyuki Tanaka, I. Kawasaki, A. Sumiyama, G. Motoyama, T. Yamamura
Akira Yamaguchi, Hiroyuki Tanaka, Ikuto Kawasaki, Akihiko Sumiyama, Gaku Motoyama and Tomoo Yamamura Graduate School of Material Sciences, University of Hyogo, 3-2-1 Kouto, Kamigoricho, Ako-gun, Hyogo, 678-1297, Japan; Department of Physics and Materials Science, Shimane University, Matsue, Shimane, 690-8504, Japan; Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi, 980-8577, Japan
{"title":"Development of dc and ac magnetic-measurement system for a ferromagnetic superconductor, uranium digermanide","authors":"A. Yamaguchi, Hiroyuki Tanaka, I. Kawasaki, A. Sumiyama, G. Motoyama, T. Yamamura","doi":"10.15669/PNST.5.119","DOIUrl":"https://doi.org/10.15669/PNST.5.119","url":null,"abstract":"Akira Yamaguchi, Hiroyuki Tanaka, Ikuto Kawasaki, Akihiko Sumiyama, Gaku Motoyama and Tomoo Yamamura Graduate School of Material Sciences, University of Hyogo, 3-2-1 Kouto, Kamigoricho, Ako-gun, Hyogo, 678-1297, Japan; Department of Physics and Materials Science, Shimane University, Matsue, Shimane, 690-8504, Japan; Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi, 980-8577, Japan","PeriodicalId":20706,"journal":{"name":"Progress in Nuclear Science and Technology","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81267478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dissolution behavior of Zr-based lanthanide nitride solid solutions, which are surrogates of Zr-based transuranium nitrides, in nitric acid was examined. Powder sample of the matrix material, ZrN was completely dissolved with 7.4 mol/L HNO3 at 383 K in 20 hours or 7.7 mol/L HNO3 at room temperature in 134 days. LnN-ZrN solid solutions were completely dissolved with milder conditions; 0.25GdN-0.75ZrN was with 7.5 mol/L HNO3 in 6 days, and 0.40DyN-0.60ZrN was with 7.7 mol/L HNO3 in 1 day or 1.0 mol/L in 20 days at room temperature. These results suggest that it became easier to dissolve LnN-ZrN solid solution with increasing the contents of LnN. From chemical analysis of LnN-ZrN samples, a change of the metal compositions during pellet sample fabrication process was observed for 0.40DyN-0.60ZrN, though not for 0.25GdN-0.75ZrN. The change of the metal composition in 0.40DyN-0.60ZrN sample is considered to be due to vaporization of Dy during the heating process.
{"title":"Dissolution and chemical analysis of Zr-based lanthanide nitrides","authors":"H. Hayashi, Rikiya Chiba","doi":"10.15669/PNST.5.196","DOIUrl":"https://doi.org/10.15669/PNST.5.196","url":null,"abstract":"Dissolution behavior of Zr-based lanthanide nitride solid solutions, which are surrogates of Zr-based transuranium nitrides, in nitric acid was examined. Powder sample of the matrix material, ZrN was completely dissolved with 7.4 mol/L HNO3 at 383 K in 20 hours or 7.7 mol/L HNO3 at room temperature in 134 days. LnN-ZrN solid solutions were completely dissolved with milder conditions; 0.25GdN-0.75ZrN was with 7.5 mol/L HNO3 in 6 days, and 0.40DyN-0.60ZrN was with 7.7 mol/L HNO3 in 1 day or 1.0 mol/L in 20 days at room temperature. These results suggest that it became easier to dissolve LnN-ZrN solid solution with increasing the contents of LnN. From chemical analysis of LnN-ZrN samples, a change of the metal compositions during pellet sample fabrication process was observed for 0.40DyN-0.60ZrN, though not for 0.25GdN-0.75ZrN. The change of the metal composition in 0.40DyN-0.60ZrN sample is considered to be due to vaporization of Dy during the heating process.","PeriodicalId":20706,"journal":{"name":"Progress in Nuclear Science and Technology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84274198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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