Physics Open最新文献_第8页

Cross sections, penetrating range and stopping power for charge particles emission from n + 52Cr n + 52Cr发射电荷粒子的截面、穿透范围和阻挡力

Physics Open Pub Date : 2023-08-03 DOI: 10.1016/j.physo.2023.100173

A.K.M. Rezaur Rahman , Md Azad Sabbir

引用次数: 1

Bulk growth of unidirectional 1, 3, 5-Triphenylbenzene (TPB) single crystal for fast neutron detection by time of flight technique 用飞行时间技术制备用于快中子探测的单向1,3,5 -三苯基苯单晶

Physics Open Pub Date : 2023-07-26 DOI: 10.1016/j.physo.2023.100170

N. Durairaj , S. Kalainathan , S. Moorthy Babu

引用次数: 0

Study of radium content and radon exhalation rates in raw building materials used in southern India 在印度南部使用的建筑原料中镭含量和氡释放率的研究

Physics Open Pub Date : 2023-07-22 DOI: 10.1016/j.physo.2023.100169

S.R. Soniya , P.J. Jojo , Mayeen Uddin Khandaker

{"title":"Study of radium content and radon exhalation rates in raw building materials used in southern India","authors":"S.R. Soniya , P.J. Jojo , Mayeen Uddin Khandaker","doi":"10.1016/j.physo.2023.100169","DOIUrl":"10.1016/j.physo.2023.100169","url":null,"abstract":"<div>As a potential source of indoor radiation arising from radon, a range of building materials (white cement, gray cement, gravel, gypsum, granite, marble, vitrified tile, and brick) were studied for the specific activity of radium and radon gas exhalation rates. The activity of radium was determined using scintillation gamma-ray spectrometry. Exhalation rates were assessed using passive and active measurement methods. Radon mass exhalation rates from powdered building materials and radon surface exhalation rates from slab-type building materials were measured. Activity concentrations of 226Ra in powder and slab-type building materials were found in the range of (1.12 – 14.98) Bqkg−1 and (17 – 308) Bqkg−1, respectively. 222Rn mass exhalation rates (mBqkg−1h−1) from the building materials were in the range of 15.0 ± 0.8 (gray cement) to 1.1 ± 0.1 (gravel). Surface exhalation rates (mBqm−2h−1) for slab-type materials have a range of 317 ± 9 (brick) to 8 ± 2 (marble). Strong positive correlations were found between the specific activity of radium and radon mass exhalation rates (r = 0.9408) and radon surface exhalation rates (r = 0.7167) for building materials investigated. Obtained data indicates that the building materials used influence indoor radon concentration in dwellings.</div>","PeriodicalId":36067,"journal":{"name":"Physics Open","volume":"17 ","pages":"Article 100169"},"PeriodicalIF":0.0,"publicationDate":"2023-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43602884","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 and numerical analysis of a novel photonic crystal fiber based chemicals sensor in the THz regime 太赫兹波段新型光子晶体光纤化学传感器的设计与数值分析

Physics Open Pub Date : 2023-07-22 DOI: 10.1016/j.physo.2023.100168

Md Selim Hossain , Rakib Hossen , Syada Tasmia Alvi , Shuvo Sen , Md Al-Amin , Md. Mahabub Hossain

{"title":"Design and numerical analysis of a novel photonic crystal fiber based chemicals sensor in the THz regime","authors":"Md Selim Hossain , Rakib Hossen , Syada Tasmia Alvi , Shuvo Sen , Md Al-Amin , Md. Mahabub Hossain","doi":"10.1016/j.physo.2023.100168","DOIUrl":"https://doi.org/10.1016/j.physo.2023.100168","url":null,"abstract":"<div>We presented a decagonal cladding and hexahedron core-based photonic crystal fiber (PCF) to sense chemicals in the terahertz frequency (THz). Circular air holes (CAHs) in the cladding region make up the proposed sensor. A wide variety of frequencies were evaluated to analyze the sensor's performance in terms of sensitivity, confinement loss, and effective material loss respectively. We designed and quantitatively analyzed the optical properties of our proposed hexahedron-based PCF sensor using the finite element method (FEM). Square-shaped air hole length, strut, and core size have also been researched to improve the performance of the proposed sensor's sensing components and fabrication tolerance. At ideal conditions, the suggested PCF sensor has a maximum relative sensitivity of 94.65%, confinement loss of 6.01 × 10−8 cm−1, effective material loss (EML) of 9.16 × 10−4 cm−1, and effective mode area (EMA) of 1.35 × 10−7 m2. We are confident that the suggested sensor's optimized geometrical structure will be manufacturing-friendly, as well as the sensor's contribution to practical uses. Furthermore, our proposed PCF fiber will be ideal in the terahertz (THz) regions for various optical communication applications and medicinal signals.</div>","PeriodicalId":36067,"journal":{"name":"Physics Open","volume":"17 ","pages":"Article 100168"},"PeriodicalIF":0.0,"publicationDate":"2023-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49766097","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

Numerical solution of KdV equation in dusty plasma system using Fourier transform 用傅里叶变换数值求解尘埃等离子体系统中的KdV方程

Physics Open Pub Date : 2023-07-12 DOI: 10.1016/j.physo.2023.100163

S. Vineeth , Manesh Michael , Noble P. Abraham

引用次数: 0

Wave packet tunneling and imaginary wave vector dispersion 波包隧道与虚波矢量色散

Physics Open Pub Date : 2023-07-04 DOI: 10.1016/j.physo.2023.100164

Walter Unglaub, A.F.J. Levi

引用次数: 0

Effect of Sn doping on structural, magnetic and power loss properties of lithium ferrites for high frequency applications 锡掺杂对高频应用锂铁氧体结构、磁性和功率损耗性能的影响

Physics Open Pub Date : 2023-07-01 DOI: 10.1016/j.physo.2023.100155

Neelam Singh , Manish Kumar Kansal , Praduman Kumar , Samiksha Dabas , Vivek Verma

{"title":"Effect of Sn doping on structural, magnetic and power loss properties of lithium ferrites for high frequency applications","authors":"Neelam Singh , Manish Kumar Kansal , Praduman Kumar , Samiksha Dabas , Vivek Verma","doi":"10.1016/j.physo.2023.100155","DOIUrl":"10.1016/j.physo.2023.100155","url":null,"abstract":"<div>The role of Sn doping on the structural, magnetic and power loss properties of Li0.5+0.5xSnxFe2.5-1.5xO4 ferrites (x = 0.0 to 0.20 in step of 0.05) + 0.5 wt % Bi2O3, prepared by solid state technique, has been investigated. X-ray diffraction reveals that Sn ions doped in lithium ferrite up to small concentration. Surface morphology recorded by SEM micrographs illustrates uniform, well connected grain growth in all samples. A small concentration of Sn doping in lithium ferrite improves the grain growth and densification. Magnetic parameters have been evaluated by M − H curves measured at room temperature by VSM. Saturation magnetization was found to be decreasing with Sn concentration in Li0.5+0.5xSnxFe2.5-1.5xO4 ferrites. In view of applicability of prepared samples for power devices, the magnetic permeability (μ* = μ′-jμ'′) has been recorded in the frequency range of 1 MHz–103 MHz at room temperature. Further, Power loss response has also been recorded in presence of magnetic induction (B = 10 mT) in frequency range of 50 kHz to 3 MHz. It was depicted a significant reduction in power loss in Sn = 0.05 doped lithium ferrite sample. Reduction in power loss with Sn doping makes it suitable for power applications.</div>","PeriodicalId":36067,"journal":{"name":"Physics Open","volume":"16 ","pages":"Article 100155"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48606437","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

Investigation for brownian motion of nonlinear thermal bioconvective SPF in a nanofluid utilizing AGM method 利用AGM方法研究纳米流体中非线性热生物对流SPF的布朗运动

Physics Open Pub Date : 2023-07-01 DOI: 10.1016/j.physo.2023.100161

A. Hasibi , A. Gholami , Z. Asadi , D. D Ganji

{"title":"Investigation for brownian motion of nonlinear thermal bioconvective SPF in a nanofluid utilizing AGM method","authors":"A. Hasibi , A. Gholami , Z. Asadi , D. D Ganji","doi":"10.1016/j.physo.2023.100161","DOIUrl":"10.1016/j.physo.2023.100161","url":null,"abstract":"<div>An analysis of the bioconvective slump point flow of nanofluid is addressed. The studied nanofluid, which contains gyrotactic microorganisms, was investigated in a porous medium on a nonlinear tensile plate in which it was placed. The scaling group transformation approach converted the analyzed PDEs to ODEs. ODEs obtained are solved using the numerical method (rkf-45) and AGM, and the results are compared with DTM and RKF methods. The accuracy of the obtained answers is remarkable compared to the mentioned methods. An increase in the density of motile microorganism distribution caused by the increment in values of bioconvection Peclet number is desired. In addition, a rapid increase in heat transfer rate and mass transfer rate happens when there is an increase in the thermophoresis parameter, heat source parameter, chemical reaction parameter, and Brownian motion parameter in a sequence. In this study, we investigated the SPF of bioconvective nanofluids containing GM. It is observed that the flow velocity increases as Da−1 decreases. As Rb increases, bioconvection increases. These studies may be used for biotechnological applications, such as the design of bioconjugates or the increase of mass transfer in microfluidics.</div>","PeriodicalId":36067,"journal":{"name":"Physics Open","volume":"16 ","pages":"Article 100161"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41731235","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 and numerical analysis of a novel photonic crystal fiber based chemicals sensor in the THz regime 太赫兹波段新型光子晶体光纤化学传感器的设计与数值分析

Physics Open Pub Date : 2023-07-01 DOI: 10.1016/j.physo.2023.100168

Md. Selim Hossain, Rakib Hossen, Syada Tasmia Alvi, Shuvo Sen, Md Al-Amin

引用次数: 0

Accuracy of the new modified Morse potential energy function for ground and excited states of diatomic molecules 双原子分子基态和激发态新修正莫尔斯势能函数的准确性

Physics Open Pub Date : 2023-07-01 DOI: 10.1016/j.physo.2023.100159

S.U. Lotliker , R. Samant , N. Mesquita , D. Liu , A.M. Desai

引用次数: 0