Quantum Beam Science最新文献_第4页

Investigating Brazilian Paintings from the 19th Century by MA-XRF MA-XRF对19世纪巴西绘画的调查

IF 1.4

Quantum Beam Science Pub Date : 2023-03-08 DOI: 10.3390/qubs7010009

A.R. Pimenta, V. Felix, Matheus Oliveira, Miguel Andrade, M.A. Oliveira, R. Freitas

{"title":"Investigating Brazilian Paintings from the 19th Century by MA-XRF","authors":"A.R. Pimenta, V. Felix, Matheus Oliveira, Miguel Andrade, M.A. Oliveira, R. Freitas","doi":"10.3390/qubs7010009","DOIUrl":"https://doi.org/10.3390/qubs7010009","url":null,"abstract":"In this work, four artworks dating from the 19th century by Brazilian painters Firmino Monteiro, Henrique Bernardelli, and Eliseu Visconti were analyzed by MA-XRF. Pb-L, Fe-K, and Hg-L were the main elemental maps obtained in all paintings. In the artworks of Henrique Bernardelli and Eliseu Visconti, maps of Cr-K and Co-K were also obtained. These results indicate that these Brazilian painters from the 19th century used few pigments to create their paintings, with the different hues coming mainly from ocher pigments. Using correlation image methods, no intentional mixtures of pigments made by the painters were found. These results indicate that the three painters used similar materials and techniques for preparing their pigments. These similarities are confirmed through statistical analysis by non-negative matrix factorization (NMF). In this method, it was possible to verify that the main bases of the contribution of the data registered in each artwork are the same. The analysis also revealed that one of Eliseu Visconti’s paintings had an underlying painting, and another artwork by Eliseu Visconti contained a golden pigment with Cu and Zn. These results have helped art historians and conservators understand the creation process of Brazilian artists in the 19th century.","PeriodicalId":31879,"journal":{"name":"Quantum Beam Science","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45969479","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}

引用次数: 3

Neutron Stress Measurement of W/Ti Composite in Cryogenic Temperatures Using Time-of-Flight Method 飞行时间法测量W/Ti复合材料在低温下的中子应力

IF 1.4

Quantum Beam Science Pub Date : 2023-03-07 DOI: 10.3390/qubs7010008

M. Nishida, S. Harjo, T. Kawasaki, Takayuki Yamashita, W. Gong

{"title":"Neutron Stress Measurement of W/Ti Composite in Cryogenic Temperatures Using Time-of-Flight Method","authors":"M. Nishida, S. Harjo, T. Kawasaki, Takayuki Yamashita, W. Gong","doi":"10.3390/qubs7010008","DOIUrl":"https://doi.org/10.3390/qubs7010008","url":null,"abstract":"In this study, the thermal stress alterations generated in a tungsten fiber reinforced titanium composite (W/Ti composite) were evaluated by the neutron stress measurement method at cryogenic temperatures. The W/Ti composite thermal loads were repeated from room temperature to the cryogenic temperature (10 K), and alterations in thermal residual stress were evaluated using the neutron in situ stress measurement method. In this measurement, the stress alterations in the titanium matrix and the tungsten fibers were measured. This measurement was carried out by TAKUMI (MLF-BL19) of J-PARC, a neutron research facility in the Japan Atomic Agency. The measurement method of TAKUMI is the time-of-flight (TOF) method. Owing to this measurement method, the measurement time was significantly shortened compared to the angle-dispersion type measurement by a diffractometer. As a result of the measurement, large compressive stresses of about 1 GPa were generated in the tungsten fibers, and tensile stresses of about 100 MPa existed in the titanium matrix. The thermal stresses due to the temperature change between room temperature and cryogenic temperature is caused by the difference of thermal expansions between the tungsten fibers and the titanium matrix, and these stress values can be approximated by a simple elastic theory equation.","PeriodicalId":31879,"journal":{"name":"Quantum Beam Science","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43327633","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}

引用次数: 0

Coulomb Spike Modelling of Ion Sputtering of Amorphous Water Ice 非晶水冰离子溅射的库仑峰模拟

IF 1.4

Quantum Beam Science Pub Date : 2023-02-28 DOI: 10.3390/qubs7010007

J. Costantini, T. Ogawa

{"title":"Coulomb Spike Modelling of Ion Sputtering of Amorphous Water Ice","authors":"J. Costantini, T. Ogawa","doi":"10.3390/qubs7010007","DOIUrl":"https://doi.org/10.3390/qubs7010007","url":null,"abstract":"The effects of electronic excitations on the ion sputtering of water ice are not well understood even though there is a clear dependence of the sputtering yield on the electronic stopping power of high-energy ions. Ion sputtering of amorphous water ice induced by electronic excitations is modelled by using the Coulomb explosion approach. The momentum transfer to ionized target atoms in the Coulomb field that is generated by swift ion irradiation is computed. Positively charged ions produced inside tracks are emitted from the surface whenever the kinetic energy gained in the repulsive electrical field is higher than the surface binding energy. For that, the energy loss of deep-lying ions to reach the surface is taken into account in the sputtering yield and emitted ion velocity distribution. Monte Carlo simulations are carried out by taking into account the interactions of primary ions and secondary electrons (δ-rays) with the amorphous water ice medium. A jet-like anisotropic ion emission is found in the perpendicular direction in the angular distribution of the sputtering yield for normal incidence of 1-MeV protons. This directional emission decreases with an increasing incidence angle and vanishes for grazing incidence, in agreement with experimental data on several oxides upon swift ion irradiation. The role of the target material’s properties in this process is discussed.","PeriodicalId":31879,"journal":{"name":"Quantum Beam Science","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43528225","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}

引用次数: 0

Design Considerations of the DUCK Detector System DUCK探测系统的设计考虑

IF 1.4

Quantum Beam Science Pub Date : 2023-02-02 DOI: 10.3390/qubs7010006

D. Beznosko, Valeriy Aseykin, A. Dyshkant, A. Iakovlev, O. Krivosheev, T. Krivosheev, V. Zhukov

{"title":"Design Considerations of the DUCK Detector System","authors":"D. Beznosko, Valeriy Aseykin, A. Dyshkant, A. Iakovlev, O. Krivosheev, T. Krivosheev, V. Zhukov","doi":"10.3390/qubs7010006","DOIUrl":"https://doi.org/10.3390/qubs7010006","url":null,"abstract":"The article describes the development, design, and upcoming construction and deployment of core modules of DUCK (Detector system of Unusual Cosmic-ray casKades), a cosmic-rays detector system aimed to verify and further study the latest advances in the cosmic-rays field and participate in the international collaborations searching for new types of events. The primary scientific goal for the DUCK project will be an independent verification of the detection of ‘unusual’ cosmic ray events by the Horizon-T detector system. A detailed study of events of this type is a vital step towards understanding the nature of cosmic rays, their origins, and details of interaction with the nuclei in the atmosphere. Further operations as part of the CREDO collaboration will contribute to the continued monitoring of the cosmic events. Additional intellectual value includes the design of the fast detection system with high timing resolution for cosmic events detection and the study of the temporal structure of extensive air showers that would also contribute to the current simulations. All the steps are conducted with student involvement and advance excellence in providing students with real research experience and competitive knowledge.","PeriodicalId":31879,"journal":{"name":"Quantum Beam Science","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43359838","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}

引用次数: 1

Overall Review on Recent Applications of Raman Spectroscopy Technique in Dentistry 拉曼光谱技术在口腔医学中的应用综述

IF 1.4

Quantum Beam Science Pub Date : 2023-02-01 DOI: 10.3390/qubs7010005

I. Otel

{"title":"Overall Review on Recent Applications of Raman Spectroscopy Technique in Dentistry","authors":"I. Otel","doi":"10.3390/qubs7010005","DOIUrl":"https://doi.org/10.3390/qubs7010005","url":null,"abstract":"The present paper reviews the applications of Raman spectroscopy in dentistry in the past two decades. This technique is considered a highly promising optical modality, widely used for the chemical identification and characterization of molecular structures, providing detailed information on the structural arrangement, crystal orientations, phase, and polymorphism, molecular interactions and effects of bonding, chemical surrounding environment, and stress on samples. Raman spectroscopy has been appropriate to investigate both organic and inorganic components of dental tissues since it provides accurate and precise spectral information on present minerals through the observation of the characteristic energies of their vibrational modes. This method is becoming progressively important in biomedical research, especially for non-invasiveness, non-destructiveness, high biochemical specificity, low water sensitivity, simplicity in analyzing spectral parameters, near-infrared region capability, and in vivo remote potential by means of fiber-optics. This paper will address the application of Raman spectroscopy in different fields of dentistry, found to be the most relevant and prevalent: early recognition of carious lesions; bleaching products performance; demineralizing effect from low-pH foods and acidic beverages; and efficiency of remineralization agents. Additionally, this review includes information on fiber-optic remote probe measurements. All described studies concern caries detection, enamel characterization, and assessment indicating how and to what extent Raman spectroscopy can be applied as a complementary diagnostic method.","PeriodicalId":31879,"journal":{"name":"Quantum Beam Science","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44832228","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}

引用次数: 1

Microscopic Depictions of Vanishing Shampoo Foam Examined by Time-of-Flight Small-Angle Neutron Scattering 用飞行时间小角中子散射检测消失洗发水泡沫的微观描述

IF 1.4

Quantum Beam Science Pub Date : 2023-01-29 DOI: 10.3390/qubs7010004

S. Koizumi, Y. Noda, Takumi Inada, T. Maeda, Shiho Yada, Tomokazu Yoshimura, Hiroshi Shimosegawa, Hiroya Fujita, Munehiro Yamada, Y. Matsue

{"title":"Microscopic Depictions of Vanishing Shampoo Foam Examined by Time-of-Flight Small-Angle Neutron Scattering","authors":"S. Koizumi, Y. Noda, Takumi Inada, T. Maeda, Shiho Yada, Tomokazu Yoshimura, Hiroshi Shimosegawa, Hiroya Fujita, Munehiro Yamada, Y. Matsue","doi":"10.3390/qubs7010004","DOIUrl":"https://doi.org/10.3390/qubs7010004","url":null,"abstract":"A novel surfactant of N–dodecanoyl–N–(2-hydroxyethyl)–β–alanine (coded as C12–EtOH–βAla) was synthesized by modifying the methyl group of N–dodecanoyl–N–methyl–β–alanine (coded as C12–Me–βAla). Amino-acid-type surfactants (C12–EtOH–βAla and C12–Me–βAla) are more healthy and environmentally friendly compared to sodium dodecyl sulfate (SDS). To investigate the microstructures of these new surfactants, we employed a method of time-of-flight small-angle neutron scattering (TOF SANS) at a pulsed neutron source, Tokai Japan (J–PARC). The advances in TOF SANS enable simultaneous multiscale observations without changing the detector positions, which is usually necessary for SANS at the reactor or small-angle X-ray scattering. We performed in situ and real-time observations of microstructures of collapsing shampoo foam covering over a wide range of length scales from 100 to 0.1 nm. After starting an air pump, we obtained time-resolved SANS from smaller wave number, small-angle scattering attributed to (1) a single bimolecular layer with a disk shape, (2) micelles in a bimolecular layer, and (3) incoherent scattering due to the hydrogen atoms of surfactants. The micelle in the foam film was the same size as the micelle found in the solution before foaming. The film thickness (~27 nm) was stable for a long time (<3600 s), and we simultaneously found a Newton black film of 6 nm thickness at a long time limit (~1000 s). The incoherent scattering obtained with different contrasts using protonated and deuterated water was crucial to determining the water content in the foam film, which was about 10~5 wt%.","PeriodicalId":31879,"journal":{"name":"Quantum Beam Science","volume":"19 12","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41260155","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}

引用次数: 0

Clonogenic Survival RBE Calculations in Carbon Ion Therapy: The Importance of the Absolute Values of α and β in the Photon Dose-Response Curve and a Strategy to Mitigate Their Anticorrelation 碳离子治疗中克隆生存的RBE计算:光子剂量-响应曲线中α和β绝对值的重要性以及减轻它们的反相关性的策略

IF 1.4

Quantum Beam Science Pub Date : 2023-01-28 DOI: 10.3390/qubs7010003

A. Parisi, C. Beltran, K. Furutani

{"title":"Clonogenic Survival RBE Calculations in Carbon Ion Therapy: The Importance of the Absolute Values of α and β in the Photon Dose-Response Curve and a Strategy to Mitigate Their Anticorrelation","authors":"A. Parisi, C. Beltran, K. Furutani","doi":"10.3390/qubs7010003","DOIUrl":"https://doi.org/10.3390/qubs7010003","url":null,"abstract":"The computation of the relative biological effectiveness (RBE) is a fundamental step in the planning of cancer radiotherapy treatments with accelerated ions. Numerical parameters derived analyzing the dose response of the chosen cell line after irradiation to photons (i.e., α and β, namely the linear and quadratic terms of the linear-quadratic model of cell survival) are generally used as input to biophysical models to predict the ion RBE. The α/β ratio for the photon exposure is generally regarded as an indicator of cell radiosensitivity. However, previous studies suggest that α/β might not be a sufficient parameter to model the RBE of relatively high linear energy transfer (LET) radiation such as carbon ions. For a fixed α/β, the effect of the absolute values of α and β on the computed RBE is underexplored. Furthermore, since α and β are anticorrelated during the fit of the photon-exposed in vitro survival data, different linear-quadratic fits could produce different sets of α and β, thus affecting the RBE calculations. This article reports the combined effect of the α/β ratio and the absolute values α and β on the RBE computed with the Mayo Clinic Florida microdosimetric kinetic model (MCF MKM) for 12C ions of different LET. Furthermore, we introduce a theory-based strategy to potentially mitigate the anticorrelation between α and β during the fit of the photon dose-response biological data.","PeriodicalId":31879,"journal":{"name":"Quantum Beam Science","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43340475","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}

引用次数: 1

Acknowledgment to the Reviewers of Quantum Beam Science in 2022 感谢《量子束科学》2022年审稿人

IF 1.4

Quantum Beam Science Pub Date : 2023-01-11 DOI: 10.3390/qubs7010002

引用次数: 0

Automated Pulsed Magnet System for Neutron Diffraction Experiments at the Materials and Life Science Experimental Facility in J-PARC J-PARC材料与生命科学实验设施中子衍射实验的自动脉冲磁体系统

IF 1.4

Quantum Beam Science Pub Date : 2022-12-27 DOI: 10.3390/qubs7010001

M. Watanabe, T. Kihara, H. Nojiri

引用次数: 1

A Machine for Ionizing Radiation Treatment of Bio-Deteriogens Infesting Artistic Objects 一种电离辐射处理污染艺术品的生物去污剂的机器

IF 1.4

Quantum Beam Science Pub Date : 2022-12-16 DOI: 10.3390/qubs6040033

M. Vadrucci

{"title":"A Machine for Ionizing Radiation Treatment of Bio-Deteriogens Infesting Artistic Objects","authors":"M. Vadrucci","doi":"10.3390/qubs6040033","DOIUrl":"https://doi.org/10.3390/qubs6040033","url":null,"abstract":"Precious cultural heritage has been inherited through past activities and maintained by the generations, and it includes artifacts and objects preserved in institutes or museum areas. As part of the study, the conservation of art objects and other cultural assets was carried out at the ENEA Frascati Research Center and attention was paid to the biodegradation aspect caused by microorganisms that cause the loss of information and artistic characteristics contained in the artifacts, for example, through covering them, the loss of color and the smearing of decorative or writing strokes. A non-chemical and non-toxic, completely ecological approach is used as an alternative bio-removal treatment to control the pathogens: these are the disinfection procedures that were applied using the REX machine. The beams of photons and electrons produced by this facility carried out anti-biodegradation activities for the control of deteriogens isolated from multi-material works. This communication concerns the REX machine, which is framed in the context of ENEA and in the panorama of activities carried out for the conservation of cultural heritage, presenting its application to case studies in which the developed technique was demonstrated as a non-invasive treatment for bio-degradation removal.","PeriodicalId":31879,"journal":{"name":"Quantum Beam Science","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44710898","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}

引用次数: 2