Journal of Nuclear Physics, Material Sciences, Radiation and Applications最新文献_第7页

Dose rate profile inside the spent fuel storage pool in case of full capacity storage 满容量贮存情况下乏燃料贮存池内的剂量率分布图

Journal of Nuclear Physics, Material Sciences, Radiation and Applications Pub Date : 2020-08-10 DOI: 10.15415/jnp.2020.81002

Amr Abdelhady

引用次数: 0

On the role of nuclear quantum gravity in understanding nuclear stability range of Z = 2 to 118 核量子引力在理解Z = 2 ~ 118核稳定范围中的作用

Journal of Nuclear Physics, Material Sciences, Radiation and Applications Pub Date : 2020-03-02 DOI: 10.15415/jnp.2019.71005

U. Seshavatharam, S. Lakshminarayana

{"title":"On the role of nuclear quantum gravity in understanding nuclear stability range of Z = 2 to 118","authors":"U. Seshavatharam, S. Lakshminarayana","doi":"10.15415/jnp.2019.71005","DOIUrl":"https://doi.org/10.15415/jnp.2019.71005","url":null,"abstract":"To understand the mystery of final unification, in our earlier publications, we proposed two bold concepts: 1) There exist three atomic gravitational constants associated with electroweak, strong and electromagnetic interactions. 2) There exists a strong elementary charge in such a way that its squared ratio with normal elementary charge is close to reciprocal of the strong coupling constant. In this paper we propose that, ℏc can be considered as a compound physical constant associated with proton mass, electron mass and the three atomic gravitational constants. With these ideas, an attempt is made to understand nuclear stability and binding energy. In this new approach, with reference to our earlier introduced coefficients k = 0.00642 and f = 0.00189, nuclear binding energy can be fitted with four simple terms having one unique energy coefficient. The two coefficients can be addressed with powers of the strong coupling constant. Classifying nucleons as ‘free nucleons’ and ‘active nucleons’, nuclear binding energy and stability can be understood. Starting from , number of isotopes seems to increase from 2 to 16 at and then decreases to 1 at For Z >= 84, lower stability seems to be, Alower=(2.5 to 2.531)Z.","PeriodicalId":16534,"journal":{"name":"Journal of Nuclear Physics, Material Sciences, Radiation and Applications","volume":"28 1","pages":"43-51"},"PeriodicalIF":0.0,"publicationDate":"2020-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78976397","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: 5

A GEANT4 Study of a Gamma-ray Collimation Array 伽玛射线准直阵列的GEANT4研究

Journal of Nuclear Physics, Material Sciences, Radiation and Applications Pub Date : 2020-02-28 DOI: 10.15415/jnp.2020.72028

Jorge López, S. González, O. Rodriguez, J. Holmes, R. Alarcon

引用次数: 0

Measurement of Content of 226Ra in Drinking Water From Some States of Mexican Republic by Liquid Scintillation Method 液体闪烁法测定墨西哥部分州饮用水中226Ra含量

Journal of Nuclear Physics, Material Sciences, Radiation and Applications Pub Date : 2020-02-28 DOI: 10.15415/jnp.2020.72025

A. Ángeles, Esther Quintero, I. Gaso, C. P. Zepeda, T. Palma, P. V. Rojas

{"title":"Measurement of Content of 226Ra in Drinking Water From Some States of Mexican Republic by Liquid Scintillation Method","authors":"A. Ángeles, Esther Quintero, I. Gaso, C. P. Zepeda, T. Palma, P. V. Rojas","doi":"10.15415/jnp.2020.72025","DOIUrl":"https://doi.org/10.15415/jnp.2020.72025","url":null,"abstract":"To assess the quality of drinking water in respect to the content of radioactivity, usually is carried out an screening program in the locations of interest, that program consist in pick representative samples of drinking water from the wells in that locations, water samples are analyzed to measuring the gross alpha/beta radioactivity by a low background proportional counter or a liquid scintillation system. When some sample exceeds the normative limit then it must be known which radionuclides are in that sample. Expected radionuclides in water are the NORM (normal occurring radioactive material) from the natural radioactive chains. 226Ra is frequently present in drinking water and is one of most important radionuclide because its “radiotoxicity”, the WHO [World Health Organization, Guidelines for drinking-water Quality, (2016)] recommends a reference level for 226Ra of 1 Bq/L (the dose coefficient for 226Ra is 2.8 x 10-7 Sv/Bq). From a national program of drinking water screening in the Mexican Republic, the samples that exceeded the national normative limits were picked again in the same well and analyzed by LS (liquid Scintillation), using the method of two phases with a not water miscible scintillator cocktail. Results of concentrations of 226Ra from drinking water are presented. In general the content of 226Ra in drinking water samples was lower that the guide values recommended for the WHO.","PeriodicalId":16534,"journal":{"name":"Journal of Nuclear Physics, Material Sciences, Radiation and Applications","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82981569","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

Behavior of Poly-A onto Kaolin Poly-A在高岭土上的行为

Journal of Nuclear Physics, Material Sciences, Radiation and Applications Pub Date : 2020-02-28 DOI: 10.15415/jnp.2020.72017

María Guadalupe Torres-Duque, C. Camargo-Raya, A. Negrón-Mendoza, S. Ramos-Bernal

引用次数: 0

Study of CT Images Processing with the Implementation of MLEM Algorithm using CUDA on NVIDIA’S GPU Framework 基于NVIDIA GPU框架的CUDA实现MLEM算法在CT图像处理中的研究

Journal of Nuclear Physics, Material Sciences, Radiation and Applications Pub Date : 2020-02-28 DOI: 10.15415/jnp.2020.72021

T. A. Valencia-Pérez, J. M. Hernández-López, E. Moreno-Barbosa, B. D. Celis-Alonso

{"title":"Study of CT Images Processing with the Implementation of MLEM Algorithm using CUDA on NVIDIA’S GPU Framework","authors":"T. A. Valencia-Pérez, J. M. Hernández-López, E. Moreno-Barbosa, B. D. Celis-Alonso","doi":"10.15415/jnp.2020.72021","DOIUrl":"https://doi.org/10.15415/jnp.2020.72021","url":null,"abstract":"In medicine, the acquisition process in Computed Tomography Images (CT) is obtained by a reconstruction algorithm. The classical method for image reconstruction is the Filtered Back Projection (FBP). This method is fast and simple but does not use any statistical information about the measurements. The appearance of artifacts and its low spatial resolution in reconstructed images must be considered. Furthermore, the FBP requires of optimal conditions of the projections and complete sets of data. In this paper a methodology to accelerate acquisition process for CT based on the Maximum Likelihood Estimation Method (MLEM) algorithm is presented. This statistical iterative reconstruction algorithm uses a GPU Programming Paradigms and was compared with sequential algorithms in which the reconstruction time was reduced by up to 3 orders of magnitude while preserving image quality. Furthermore, they showed a good performance when compared with reconstruction methods provided by commercial software. The system, which would consist exclusively of a commercial laptop and GPU could be used as a fast, portable, simple and cheap image reconstruction platform in the future.","PeriodicalId":16534,"journal":{"name":"Journal of Nuclear Physics, Material Sciences, Radiation and Applications","volume":"14 1","pages":"165-171"},"PeriodicalIF":0.0,"publicationDate":"2020-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85364863","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

Radiation Induced Reactions of Succinic Acid in Aqueous Solution: An Agent-Based Model 琥珀酸在水溶液中的辐射诱导反应:基于试剂的模型

Journal of Nuclear Physics, Material Sciences, Radiation and Applications Pub Date : 2020-02-28 DOI: 10.15415/jnp.2020.72014

A. L. Rivera, Sergio Ramos-Beltran, A. Negrón-Mendoza

{"title":"Radiation Induced Reactions of Succinic Acid in Aqueous Solution: An Agent-Based Model","authors":"A. L. Rivera, Sergio Ramos-Beltran, A. Negrón-Mendoza","doi":"10.15415/jnp.2020.72014","DOIUrl":"https://doi.org/10.15415/jnp.2020.72014","url":null,"abstract":"An approach to studying the formation of critical bio-organic compounds in the early Earth is to simulate in the laboratory possible processes that may occur in primitive scenarios. In this context, it can be studied the evolution of succinic acid in an aqueous media exposed to gamma radiation, as starting material produced more complex prebiotic molecules. To describe the products generated by the interaction of the different elements under radiation, there is a mathematical model that considers chemical reactions as nonlinear ordinary differential equations based on the mass balance of all the species, that has been implemented here by an agent-based model. In this simulation, each chemical species involved is considered as an agent that can interact with other species with known reaction rates, and the radiation is taken as a factor that promotes product formation. The results from the agentbased model are compared with the molar concentrations of succinic acid, and its products obtained in the lab. Simulation shows the exponential decomposition of succinic acid due to gamma radiation at room temperature in agreement with the laboratory model.","PeriodicalId":16534,"journal":{"name":"Journal of Nuclear Physics, Material Sciences, Radiation and Applications","volume":"14 1","pages":"117-121"},"PeriodicalIF":0.0,"publicationDate":"2020-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90949771","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

Stability of Glycine in Saline Solutions Exposed to Ionizing Radiation 甘氨酸在电离辐射下盐溶液中的稳定性

Journal of Nuclear Physics, Material Sciences, Radiation and Applications Pub Date : 2020-02-28 DOI: 10.15415/jnp.2020.72009

Laura Patricia Cruz-Cruz, A. Negrón-Mendoza, A. Heredia-Barbero

引用次数: 0

Feasibility of Formation of Ge1-x-y Six Sny Layers With High Sn Concentration via Ion Implantation 离子注入制备高锡浓度Ge1-x-y六Sny层的可行性

Journal of Nuclear Physics, Material Sciences, Radiation and Applications Pub Date : 2020-02-28 DOI: 10.15415/jnp.2020.72006

Randall L. Holliday, Joshua M. Young, Satyabrata Singh, F. McDaniel, B. Rout

引用次数: 0

Development and Validation of an X-ray Imaging Detector for Digital Radiography at Low Resolution 低分辨率数字x射线成像探测器的研制与验证

Journal of Nuclear Physics, Material Sciences, Radiation and Applications Pub Date : 2020-02-28 DOI: 10.15415/jnp.2020.72023

A. R. Reyes, G. H. Corral, Elsa G. Ordoñez Casanova, H. Mandujano, Uzziel Caldiño Herrera

{"title":"Development and Validation of an X-ray Imaging Detector for Digital Radiography at Low Resolution","authors":"A. R. Reyes, G. H. Corral, Elsa G. Ordoñez Casanova, H. Mandujano, Uzziel Caldiño Herrera","doi":"10.15415/jnp.2020.72023","DOIUrl":"https://doi.org/10.15415/jnp.2020.72023","url":null,"abstract":"Digital X-ray detectors are required in different sciences and applications, however many high quality devices are expensive although high-resolution images are not always required. We present an easy way to build a detector capable of forming X-ray digital images and video with a very large area (18×18 cm2). The detector is formed by three main components: scintillator, optics lenses and CCD sensor. Basically, the device converts the X-rays into visible light which is then collected by the CCD sensor. The scintillator is Gadox type, from Carestream®, 18×18 cm2, regular type, lambda 547 nm. The optics lenses are generic, with manual focus and widely visual field. The CCD sensor has a size of 1/3″, 752 × 582 pixels, monochrome, 20 FPS, 12 bits ADC and pixel size of 3.8 μm. With the built detector and an X-ray source, we formed an X-ray imaging detection system to generate digital radiographs of biological or inert objects-examples are given-, as well as real-time X-ray video. Additionally, the spatial resolution limit was measured in terms of Modulation Transfer Function by the method of opaque edge from a lead sheet with a result of 1.1 Lp/mm. Finally using a filter, the focal spot of the X-ray source is measured, resulting in a diameter of 0.9 mm (FWHM).","PeriodicalId":16534,"journal":{"name":"Journal of Nuclear Physics, Material Sciences, Radiation and Applications","volume":"103 1","pages":"181-187"},"PeriodicalIF":0.0,"publicationDate":"2020-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76709828","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