Radiation Physics and Chemistry最新文献

{"title":"Remarkable improvement in radiation shielding efficiency, thermal insulation performance and compressive strength of rigid polyurethane foam composites by synergetic effect of PbO and colemanite fillers","authors":"Ugur Soykan, Yalcin Kalkan, Senol Kaya, Selcen Uzun Duran, Rıfkı Terzioglu, Sedat Cetin","doi":"10.1016/j.radphyschem.2024.112401","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2024.112401","url":null,"abstract":"Developing radiation shielding materials is a critical phenomenon for protecting people and the environment with the increment in usage of nuclear technology in today's world. With this sense, PbO/colemanite-filled rigid polyurethane foams were fabricated by one-shut free rise method, and their performances were investigated via the advanced characterization techniques such as ATR-FTIR, SEM-EDS, TGA as well as thermal conductivity, universal mechanical and radiation shielding tests. The characteristic properties of the samples were evaluated in detail depending on the variation in the filler contents. The ATR-FTIR analysis illustrated that RPUF matrices exhibited good compatibility with the fillers by forming the secondary chemical bonds. Furthermore, SEM analysis revealed that the samples with low PbO/colemanite fillers exhibited fairly uniform and regular cellular morphology with anisotropic elliptical apparition thanks to synergetic catalytic effect of the filler particles, whereas, at high content, some local distortions with slightly chaotic appearance were observed accompanied by viewing the little ruptures and bursts in cell face and collapsed in cell plateau borders. TGA measurement indicated that the inclusion of the fillers into RPUF got worse the samples with comparison of neat RPUF due to the reduction in crosslinking density of the foam. Remarkable improvement (about 25 %) was also obtained in thermal insulation performance at the foam composites containing the fillers due to highly augmentation in number of closed cells and presence of more immobile CO<ce:inf loc=\"post\">2</ce:inf> gas inside the cells. Furthermore, high inclusion of the fillers in RPUF matrix improved compressive strength of the foams by nearly 15 % by enhancing the bending moment and rigidity of RPUF matrices via contributing to the overall stress dispersion. According to linear and mass attenuation coefficients results, the foam composites displayed excellent X-ray radiation shielding performance with increasing of PbO/colemanite content thanks to the density increment and presence of the atoms with high atomic number. Furthermore, at low photon energy levels, better shielding against X-ray radiation was obtained, while vice versa at high energy levels.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"11 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142670532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Radiochromism of spiropyran via the radical ions studied by pulsed electron radiolysis and DFT calculation","authors":"Minoru Yamaji ,&nbsp;Yasuko Osakada ,&nbsp;Sachiko Tojo ,&nbsp;Mamoru Fujitsuka","doi":"10.1016/j.radphyschem.2024.112393","DOIUrl":"10.1016/j.radphyschem.2024.112393","url":null,"abstract":"<div><div>Spiropyrans and spirooxazines (SP) are known to undergo photochromism to form merocyanines (MC). In this study, upon pulsed electron radiolysis of SP in organic solvents, we observed the transient absorption spectra of SP radical ions in the visible wavelength region. Based on first-order kinetics in the microsecond time domain, the absorption spectra changed to different ones, which were plausibly due to the radical ions of the corresponding MC. The reaction rates from SP radical ions to MC ones were determined. Using heats of formation for the radical ions of SP and MC evaluated with DFT calculations, the differences in heats of formation between the radical ions of SP and MC were determined to be exothermic. The reaction rate correlated with the difference in heat of formation, which depended on the parity of the radical ions. Time-dependent DFT calculations provided the SOMO surfaces of the radical ions of SP and MC. Comparing the SOMO with the LUMO, HOMO, and HOMO-1 surfaces of the neutral SP, we found that the attached electron locates on the LUMO upon one-electron reduction in SP, whereas the HOMO-1 of SP is involved in one-electron oxidation of SP rather than the HOMO.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"227 ","pages":"Article 112393"},"PeriodicalIF":2.8,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermoluminescence and structural characterization of biochar in the photon doses of 2–20 Gy for dosimetric applications","authors":"Umme Muslima ,&nbsp;Mayeen Uddin Khandaker ,&nbsp;S.E. Lam ,&nbsp;S.N. Mat Nawi ,&nbsp;S.F. Abdul Sani ,&nbsp;D.A. Bradley ,&nbsp;N.M. Ung ,&nbsp;Mustafa Mahmoud ,&nbsp;R. Saidur ,&nbsp;H.J. Woo","doi":"10.1016/j.radphyschem.2024.112386","DOIUrl":"10.1016/j.radphyschem.2024.112386","url":null,"abstract":"<div><div>The present study aims to develop a thermoluminescence (TL) material for dosimeter that might potentially surpass the performance of passive dosimeters that are currently available. The study focuses on the essential TL characteristics of biochar that is rich in carbon. The main thermoluminescence (TL) dosimetric properties of commercially available biochar under exposure to X-ray photon beams from Linac at doses ranging from 2 Gy to 20 Gy have been examined. These properties include dose response, sensitivity, TL glow curve, energy dependency, and fading. It has been demonstrated that the biochar provides an excellent linear response in the dose range under study and sensitive at lower dose. The biochar sample demonstrated great reproducibility, with a standard variation of less than 3%. Furthermore, a fading study was conducted and a minimum rate of fading for ambient light and dark room circumstances was discovered. The dose-dependent microstructural degradation of biochar is confirmed by SEM/EDX analysis. The structural changes caused by the radiation doses are being monitored using Raman spectra and X-ray diffraction (XRD). The kinetic parameters analysis also confirms the structural alteration brought by photon irradiation. As a result, biochar demonstrates the significant potential to be used in dosimetric applications.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"227 ","pages":"Article 112386"},"PeriodicalIF":2.8,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of quench correction methods for 90Sr/90Y assessment in waters after nuclear incident","authors":"Ivana Stojković ,&nbsp;Nataša Todorović ,&nbsp;Jovana Nikolov ,&nbsp;Andrej Vraničar ,&nbsp;Slobodan Gadžurić ,&nbsp;Milan Vraneš","doi":"10.1016/j.radphyschem.2024.112385","DOIUrl":"10.1016/j.radphyschem.2024.112385","url":null,"abstract":"<div><div>One important matter of environmental radioactivity monitoring is the accuracy and precision of the ⁹⁰Sr/⁹⁰Y measurement techniques. When Cherenkov counting is carried out in coloured waters, the reduction in detection efficiency can cause significant errors in the obtained results. Two colour quench correction methods were considered in this study: the conventional SCR (Sample Channels Ratio) technique and the Muonic peak method. The latter indicates the quench level via the position of the muonic peak in the cosmic background spectrum. So far, there have been no reports about the Muonic peak method's implementation in Cherenkov counting of ⁹⁰Sr/⁹⁰Y in waters. The performance, limitations, advantages, and drawbacks of two methods have been compared based on the analysis of coloured spiked test samples. The Muonic peak method provided similar accuracy as the SCR method in test samples. The adequacy and effectiveness of both techniques have been confirmed during ⁹⁰Sr routine monitoring in the event of a nuclear emergency or radioactive leakage from nuclear facilities.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"227 ","pages":"Article 112385"},"PeriodicalIF":2.8,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bayesian approach for inferring two-dimensional location of a radioactive material using distributed detectors","authors":"Giyoon Kim ,&nbsp;Sanggeol Jeong ,&nbsp;Jinhwan Kim ,&nbsp;Kyung Taek Lim ,&nbsp;Heejun Chung ,&nbsp;Myungsoo Kim","doi":"10.1016/j.radphyschem.2024.112389","DOIUrl":"10.1016/j.radphyschem.2024.112389","url":null,"abstract":"<div><div>Our research team developed a small probe to measure and analyze the environmental radiation at the sampling site for nuclear inspection. The location and activity of the radiation source are estimated using data obtained from multiple probes. In this study, Bayesian inference was applied to infer the location and activity of the radiation source. The experiments were conducted under the one-source and two-source conditions, with the same area, distribution of the probes, and measurement time. To quantitatively express how well the inferred coordinates represent the actual coordinates, the coefficient of determination was calculated. Root Mean Square Error was used to express the errors in the inferred data. In addition, measurement experiments were conducted in high-radiation areas near the Fukushima Daiichi nuclear power plant. Our model can provide sufficient information for inferring the location of leaked material and evaluating the safety in various environments such as nuclear verification, accidents, or terrorist activities.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"227 ","pages":"Article 112389"},"PeriodicalIF":2.8,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization of proton-induced neutron spectrum on Ti-nat target in 11 MeV cyclotron using a passive single moderator neutron spectrometer","authors":"Rasito Tursinah ,&nbsp;Sidik Permana ,&nbsp;Zaki Su'ud ,&nbsp;Alan Maulana ,&nbsp;Imam Kambali ,&nbsp;Abu Khalid Rivai ,&nbsp;Mujamilah ,&nbsp;Ismet Isnaini ,&nbsp;Kasmudin Kasmudin ,&nbsp;Haryo Seno ,&nbsp;Hana Subhiyah ,&nbsp;Ausatha R. Yanto ,&nbsp;Adli Muhaimin ,&nbsp;Nurhuda ,&nbsp;Hari Suryanto ,&nbsp;Wahyudi","doi":"10.1016/j.radphyschem.2024.112387","DOIUrl":"10.1016/j.radphyschem.2024.112387","url":null,"abstract":"<div><div>The neutron spectrum resulting from the interaction of protons with the materials in the cyclotron must be characterized to predict the effects of neutron activation on the various cyclotron component materials. Neutron spectrum measurements were carried out using a single moderator neutron spectrometer (SCNS) with an Au activation foil detector to analyze proton-induced effects on a natural titanium target in a self-shielding 11 MeV cyclotron. During the experiment, a disk-shaped Ti-nat target, 5 mm in diameter and 1 mm thick, was irradiated with proton beam at a current of 15 μA for 5 min. The neutron spectrometer, located inside the self-shielding, was then used to measure the ¹⁹⁸Au activity of each Au foil employing an HPGe detector of gamma spectrometer. The neutron spectrum was determined using UMG software based on the ¹⁹⁸Au activity values measured from each foil and the calculated response values for each foil detector. The obtained neutron spectrum showed a maximum energy of 8.5 MeV and a peak fast neutron energy of 2.5 MeV, with a total flux of (5.72 ± 0.40) × 10⁵ n/cm²·s, consisting of 75% fast neutrons, 20% epithermal neutrons, and 5% thermal neutrons. The results of measuring the neutron spectrum using SCNS–Au are quite accurate because they only have a 10% difference compared to the simulation results using PHITS software.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"227 ","pages":"Article 112387"},"PeriodicalIF":2.8,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cross-sections for formation of 73Ga through natGe(n, x)73Ga reaction induced by d-T neutrons","authors":"Junhua Luo ,&nbsp;Long He ,&nbsp;Liang Zhou ,&nbsp;Li Jiang","doi":"10.1016/j.radphyschem.2024.112384","DOIUrl":"10.1016/j.radphyschem.2024.112384","url":null,"abstract":"<div><div>The formation of ⁷³Ga through ^natGe(n,<em>x</em>)⁷³Ga reaction induced by d-T neutrons was investigated using cross-sections measured by four characteristic gamma-rays employing the weighted average method. The neutron energy and uncertainty were determined by the Q equation of reaction ³H(d,n)⁴He combined with the solid angle of the sample. The gamma spectrum of the activated sample was obtained by an off-line technique using a high-resolution, high-purity germanium detector (HPGe). The contribution of nuclear reactions ⁷⁶Ge(n,α)⁷³Zn, ⁷³Ge(n,p)⁷³Ga, and ⁷⁴Ge(n,d∗)⁷³Ga to residual nuclei ⁷³Ga was analyzed and the cross-sections of reaction ⁷³Ge(n,p)⁷³Ga were determined with a small uncertainty. The TALYS-1.96 package was utilized for performing the theoretical calculation of the cross section of ⁷⁶Ge(n,α)⁷³Zn, ⁷³Ge(n,p)⁷³Ga, and ⁷⁴Ge(n,d∗)⁷³Ga reactions. The results of the theoretical calculation of nuclear reaction ⁷³Ge(n,p)⁷³Ga were compared with the experimental measurements and the evaluation results provided by the database.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"227 ","pages":"Article 112384"},"PeriodicalIF":2.8,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The effect of high-energy electron beam irradiation on the physicochemical properties of PET material","authors":"R.A. Vazirov, A.E. Shkuro, V.G. Buryndin, P.S. Zakharov, O.F. Shishlov, E.N. Vazirova","doi":"10.1016/j.radphyschem.2024.112392","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2024.112392","url":null,"abstract":"Polyethylene terephthalate (PET) is a thermoplastic polyester used in the manufacture of containers and packaging. PET waste occupies one of the top positions in terms of volume among polymer waste. The radiation modification of PET is a promising method for regulating its operational and technological properties. It is assumed that irradiation of PET waste with an electron beam will facilitate its secondary processing. The aim of this work was to study the effect of the ionizing radiation on the PET physicochemical and physicomechanical properties. For this purpose, samples were irradiated by hig-energy electron beam with energy 10 MeV and dose range 0–600 kGy. The radiation-induced EPR of the signal was measured, and the dose dependence was estimated. As a result, it was found that irradiation with electrons leads to a decrease in the melting temperature and an increase in the melt fluidity and glass transition temperature of PET. The hardness and rigidity of the irradiated samples increase. The changes in properties are explained by the destruction of PET macromolecules, which proceeds with the formation of carboxyl and carbonyl groups.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"1 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142670530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Physico-mechanical properties of bio-plasticized PVC crosslinked by electron beam irradiation","authors":"Nastaran Valipouri ,&nbsp;Mehdi Entezam ,&nbsp;Maryam Mohammadi","doi":"10.1016/j.radphyschem.2024.112371","DOIUrl":"10.1016/j.radphyschem.2024.112371","url":null,"abstract":"<div><div>In the last decades, bio-plasticizers such as epoxidized soybean oil (ESBO) have emerged as eco-friendly alternatives to traditional phthalate plasticizers in poly(vinyl chloride) (PVC) compounds, owing to their non-toxic and stable properties. This study delves into the integration of ESBO as a bio-plasticizer and trimethylol propane trimethacrylate (TMPTMA) as a cross-linking agent in PVC irradiated by electron beam. Employing the melt-mixing method, varied concentrations of TMPTMA (1, 3 and 5 phr) along with ESBO or dioctyl phthalate (DOP) were incorporated into PVC, followed by electron beam irradiation at different doses (50, 100, 200 kGy) under ambient atmospheric conditions. A systematic approach, using a full factorial experimental design method, was adopted to evaluate the combined influence of TMPTMA concentration and irradiation dose on the physical and mechanical properties of PVC. The findings revealed a higher resistance to irradiation induced degradation as well as somewhat less thermal degradation in PVC samples with ESBO compared to those with DOP. While decreasing of the glass transition temperature (Tg) for bio-plasticized PVC was the same as that for PVC plasticized by DOP, bio-plasticized PVC samples showed higher tensile strength and thermal dimensional stability and less plasticizer migration. A detailed analysis of hot-set test outcomes and tensile mechanical properties, facilitated by the experimental design methodology, highlighted that the irradiation dose had a more profound impact on the properties of PVC than the TMPTMA concentration. The study also identified an interaction effect between these variables, and their influences on the tensile strength and hot-set were modeled.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"227 ","pages":"Article 112371"},"PeriodicalIF":2.8,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Damage mechanisms caused by radiation in Proton(ion beam) double interface layer nano-MOS structure","authors":"Defne Akay ,&nbsp;Özlem Abay ,&nbsp;Hüseyin Sönmez ,&nbsp;Uğur Gökmen ,&nbsp;Sema Bilge Ocak","doi":"10.1016/j.radphyschem.2024.112366","DOIUrl":"10.1016/j.radphyschem.2024.112366","url":null,"abstract":"<div><div>In this study, the effects of ion beam (proton) on the PbO/SnO₂/p-Si double interfacial layer MOS Schottky diode material were studied. The parameters of the ionizing radiation detection properties and radiation resistance of using double interfacial oxide layers were analyzed in MOS Schottky diodes. In the analysis, SRIM/TRIM software code was examined theoretically and modeled using simulation. The displacement per atom occurs more in the SnO₂ oxide layer than in the other interface layer. This can be explained by the concept of Bragg Curve Peak, which occurs as a result of ion beam induced doping effect. It has been observed that the electrical properties of the PbO/SnO₂/p-Si double interface layer MOS Schottky diode structure in terms of sensing ionizing radiation change after ion beam induced doping and the interface states are affected. It has been shown that our double interface layer nano-MOS structure can be used as a ion beam based sensor on these results. In addition to the inelastic collision, without causing ionization NIEL values of PbO and SnO₂ layers were found to be 424.88 MeV. cm²/g and 524.9 MeV. cm²/g, respectively. These theoretical results were shown as graphs using the TRIM Monte Carlo simulation program and the behavior of the phonons in the layers was modeled. Additionally, LET values were calculated according to layers and compared with the simulation results of TRIM. While the LET value of the PbO layer was 889.3 MeV. cm²/g, the LET value of the SnO₂ layer was determined to be 1639 MeV cm²/g. The LET concept is visually presented with the TRIM software and it is seen that the displacement per atom is highest in the SnO₂ layer and the Bragg Curve reaches its maximum point. Thus, it can be seen that the SnO₂ layer produces more transient damage and oxide interface traps compared to the PbO layer as ionizing radiation propagates between the oxide layers. By studying the effects of the ion beam source on the MOS Schottky diode structure, it is shown that the double interface layer structure increases the oxide interface traps and the SnO₂ material is promising in terms of radiation sensing and detection properties. Moreover, MOS Schottky states that using a double interface layer instead of a single oxide layer in MOS structures positively increases the number of interface traps in the oxide layer for ion beam radiation detection.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"227 ","pages":"Article 112366"},"PeriodicalIF":2.8,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}