Physics Research International最新文献_第6页

Free Convective Fluctuating MHD Flow through Porous Media Past a Vertical Porous Plate with Variable Temperature and Heat Source 自由对流波动MHD通过多孔介质通过垂直多孔板的温度和热源变化

Physics Research International Pub Date : 2014-05-06 DOI: 10.1155/2014/587367

A. K. Acharya, G. C. Dash, S. Mishra

引用次数: 19

Multigap Superconductivity in the Ferromagnetic Superconductor UCoGe Revealed by Thermal Conductivity Measurements 热导率测量揭示铁磁超导体UCoGe的多隙超导性

Physics Research International Pub Date : 2014-05-05 DOI: 10.1155/2014/454939

L. Howald, M. Taupin, D. Aoki

引用次数: 3

Investigation of Gamma and Neutron Shielding Parameters for Borate Glasses Containing NiO and PbO 含NiO和PbO硼酸玻璃的γ和中子屏蔽参数研究

Physics Research International Pub Date : 2014-04-23 DOI: 10.1155/2014/954958

Vishwanath P. Singh, N. M. Badiger

引用次数: 24

Linear Sigma Model at Finite Temperature and Baryonic Chemical Potential Using the N-Midpoint Technique 用n -中点技术研究有限温度下的线性Sigma模型和重子化学势

Physics Research International Pub Date : 2014-03-06 DOI: 10.1155/2014/435023

M. Abu-shady

引用次数: 0

Estimating the Cation Distributions in Ferrites Using X-Ray, FT-IR, and Magnetization Measurements 利用x射线、红外光谱和磁化测量估计铁氧体中的阳离子分布

Physics Research International Pub Date : 2014-03-04 DOI: 10.1155/2014/579745

M. C. Varma, G. Choudary, A. M. Kumar, K. Rao

引用次数: 16

Structural and Optical Properties of Germanium Thin Films Prepared by the Vacuum Evaporation Technique 真空蒸发法制备锗薄膜的结构和光学性质

Physics Research International Pub Date : 2014-02-17 DOI: 10.1155/2014/594968

Z. Al-Sharafi, S. Mohyeddine, Samir Osman Mohammed, R. M. Kershi

{"title":"Structural and Optical Properties of Germanium Thin Films Prepared by the Vacuum Evaporation Technique","authors":"Z. Al-Sharafi, S. Mohyeddine, Samir Osman Mohammed, R. M. Kershi","doi":"10.1155/2014/594968","DOIUrl":"https://doi.org/10.1155/2014/594968","url":null,"abstract":"Germanium (Ge) thin films have been deposited onto the glass substrates by the vacuum evaporation technique. The effect of annealing temperature on the structural and optical properties of the germanium thin films was investigated. The structural and optical properties of thin films were characterized by XRD, SEM, and UV-Vis techniques. XRD results showed that the structure of the deposited thin films changed from amorphous phase for the films, which deposited at room temperature, to crystalline phase for the films, which deposited at high temperature. Optimum temperature to obtain a good crystalline structure was 525°C. The SEM image also showed that the crystallization of the thin films is increased with increasing of annealing temperature. Transmittance and reflectance spectral were used to calculate the absorption coefficient. Two absorption edges in two spectral regions were distinguished according to direct and indirect electron transitions. Energy band gap was calculated by using the Tauc relationship for both direct and indirect electron transitions. The average value of was equal to 0.79 eV and 0.61 eV for direct and indirect transitions, respectively.","PeriodicalId":20143,"journal":{"name":"Physics Research International","volume":"12 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2014-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82001115","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

Magnetohydrodynamic Boundary Layer Flow of Nanofluid over an Exponentially Stretching Permeable Sheet 纳米流体在指数拉伸可渗透薄片上的磁流体动力学边界层流动

Physics Research International Pub Date : 2014-01-08 DOI: 10.1155/2014/592536

K. Bhattacharyya, G. Layek

引用次数: 79

Preparation, Characterization, and Luminescence Properties of Orthorhombic Sodium Sulphate 正交硫酸钠的制备、表征及发光性能

Physics Research International Pub Date : 2013-12-24 DOI: 10.1155/2013/641631

Y. Vidya, B. N. Lakshminarasappa

{"title":"Preparation, Characterization, and Luminescence Properties of Orthorhombic Sodium Sulphate","authors":"Y. Vidya, B. N. Lakshminarasappa","doi":"10.1155/2013/641631","DOIUrl":"https://doi.org/10.1155/2013/641631","url":null,"abstract":"A highly efficient thermoluminescence Na2SO4 phosphor with thenardite polymorphic structure was prepared by simple slow evaporation technique followed by subsequent calcination at 200°C, 400°C, and 600°C for 4 h and the resultant crystals were characterized by various analytical techniques. All the samples exhibited thermodynamically stable thenardite phase and the grain growth was increased for the calcined samples. SEM analysis indicated the fine distribution of twinned orthogonal prism and pyramidal structure without any agglomeration. The electron spin resonance spectroscopy showed the existence of radicals as trap centre. The thermoluminescence behavior suggested the charge carrier recombination dynamics in the thenardite sample followed second-order kinetics. The trapping parameters such as activation energy (), order of kinetics (), and frequency factor () have been determined using Chen’s peak shape method. Further fading of the TL intensity of Na2SO4 showed that thenardite is quite suitable for radiation dosimetry even up to 15 days. The photoluminescence band of Na2SO4 reduced in its intensity after γ-irradiation, suggesting that defects are unstable and decay rapidly.","PeriodicalId":20143,"journal":{"name":"Physics Research International","volume":"10 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2013-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90963584","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: 14

Molecular Tomography of the Quantum State by Time-Resolved Electron Diffraction 时间分辨电子衍射的量子态分子层析成像

Physics Research International Pub Date : 2013-12-23 DOI: 10.1155/2013/236743

A. Ischenko

引用次数: 5

Reconciliating the Vertical and Horizontal Gradients of the Sunspot Magnetic Field 调和太阳黑子磁场的垂直和水平梯度

Physics Research International Pub Date : 2013-12-23 DOI: 10.1155/2013/195403

V. Bommier

{"title":"Reconciliating the Vertical and Horizontal Gradients of the Sunspot Magnetic Field","authors":"V. Bommier","doi":"10.1155/2013/195403","DOIUrl":"https://doi.org/10.1155/2013/195403","url":null,"abstract":"In the literature, we found 15 references showing that the sunspot photospheric magnetic field vertical gradient is on the order of 3-4 G/km, with field strength decreasing with height, whereas the horizontal gradient is nine times weaker on the order of 0.4-0.5 G/km. This is confirmed by our recent THEMIS observations. As a consequence, the vanishing of is not realized. In other words, a loss of magnetic flux is observed with increasing height, which is not compensated for by an increase of the horizontal flux. We show that the lack of spatial resolution, vertical as well as horizontal, cannot be held responsible for the nonvanishing observed . The present paper is devoted to the investigation of this problem. We investigate how the magnetic field is influenced by the plasma anisotropy due to the stratification, which is responsible for an “aspect ratio” between horizontal and vertical typical lengths. On the example of our THEMIS observations, made of two spectral lines formed at two different depths, which enables the retrieval of the three components entering , it is shown that once this aspect ratio is applied, the rescaled vanishes, which suggests a new methodology for MHD modeling in the photosphere.","PeriodicalId":20143,"journal":{"name":"Physics Research International","volume":"33 1","pages":"1-16"},"PeriodicalIF":0.0,"publicationDate":"2013-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90744154","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: 7