发布求助
文献互助 智能选刊 最新文献

The European Physical Journal Plus最新文献

筛选
英文 中文
Concentrations of alpha emitters in foodstuffs manufactured in the Bashiqa Region in Iraq using CR-39 detector
IF 2.8 3区 物理与天体物理
The European Physical Journal Plus Pub Date : 2025-02-17 DOI: 10.1140/epjp/s13360-025-06077-7
Malik Hussien Kheder, Hanaa Nafi Azeez, Yasir Yahya Kassim, Rajaa Abdullah Basheer
{"title":"Concentrations of alpha emitters in foodstuffs manufactured in the Bashiqa Region in Iraq using CR-39 detector","authors":"Malik Hussien Kheder,&nbsp;Hanaa Nafi Azeez,&nbsp;Yasir Yahya Kassim,&nbsp;Rajaa Abdullah Basheer","doi":"10.1140/epjp/s13360-025-06077-7","DOIUrl":"10.1140/epjp/s13360-025-06077-7","url":null,"abstract":"<div><p>Eating various meals exposes humans to a certain degree of radiation because natural radioactivity is always present in diet. Measuring the uranium activity and radon in a selected foods manufactured in the Bashiqa Region is the focus of this investigation using CR-39 detector. The findings demonstrated that the uranium activity concentration ranged from 0.9 to 2.56 Bq kg<sup>−1</sup>. The radon concentration ranges from 54.8 to 99.3 Bq m<sup>−3</sup>. The results indicated that all radon concentrations were significantly lower than of 400 Bq m<sup>−3</sup> the worldwide standard radon recommended concentration by the (ICRP) international commission on radiological protection. According to this research, food items are safe from uranium and radon pollution.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 2","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143430814","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}
引用次数: 0
Gain-assisted excitation and manipulation of surface plasmon-polaritons
IF 2.8 3区 物理与天体物理
The European Physical Journal Plus Pub Date : 2025-02-17 DOI: 10.1140/epjp/s13360-025-06085-7
Rafi Ud Din, Hazrat Ali, Rashid Ahmad
{"title":"Gain-assisted excitation and manipulation of surface plasmon-polaritons","authors":"Rafi Ud Din,&nbsp;Hazrat Ali,&nbsp;Rashid Ahmad","doi":"10.1140/epjp/s13360-025-06085-7","DOIUrl":"10.1140/epjp/s13360-025-06085-7","url":null,"abstract":"<div><p>The excitation and manipulation of surface plasmon-polaritons (SPPs) are analyzed at a flat interface between a gain medium and a metal in Otto-type configuration. The gain medium is assumed to be a three-level atomic system whose transitions are coupled by two optical and one microwave fields. We show that, by making a transition from lossy dielectric to a gain medium, the losses for plasmonic waves can be greatly reduced, leading to reduced absorption and higher propagation distances for these modes. It is further emphasized that, in comparison to the lossy nature of the medium, maximum excitation can be achieved when the dielectric is a gain medium. Moreover, the SPPs can be manipulated with the frequencies and effective phase of the coupling fields driving the gain medium. The obtained results may find applications in low-loss plasmonic lasers and routers.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 2","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143430811","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}
引用次数: 0
Effect of frequency-chirped ionization laser on accelerated electron beam characteristics in plasma wakefield acceleration
IF 2.8 3区 物理与天体物理
The European Physical Journal Plus Pub Date : 2025-02-17 DOI: 10.1140/epjp/s13360-025-06061-1
Jagnishan Singh, Sandeep Kumar, Niti Kant, Jyoti Rajput
{"title":"Effect of frequency-chirped ionization laser on accelerated electron beam characteristics in plasma wakefield acceleration","authors":"Jagnishan Singh,&nbsp;Sandeep Kumar,&nbsp;Niti Kant,&nbsp;Jyoti Rajput","doi":"10.1140/epjp/s13360-025-06061-1","DOIUrl":"10.1140/epjp/s13360-025-06061-1","url":null,"abstract":"<div><p>Trojan Horse underdense photocathode plasma wakefield acceleration is an effective technique for generating ultralow-emittance electron bunches. In this study, we investigate the impact of frequency chirp in the ionization laser on the properties of the accelerated electron bunches using two-dimensional (2D) particle-in-cell (PIC) simulations. It is found that the total charge of the high-energy electrons produced in the acceleration process depends strongly on the magnitude and the sign of frequency chirp in ionization laser. For an un-chirped ionization laser, an electron bunch gets a maximum acceleration of up to 400 MeV with bunch current <span>(I_{p} sim 0.27{text{kA}})</span>. However, the use of a negative-chirped ionization laser shows lower energy gain, i.e., 200 MeV with an enhanced bunch current <span>(I_{p} sim 5{text{kA}})</span>, with normalized emittance <span>( varepsilon _{n} sim 0.78;mu m )</span> in 7.5-mm-long plasma channel. Such high current electron bunches will be useful for compact hard X-ray free-electron laser (FEL) sources.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 2","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143430812","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}
引用次数: 0
Emergence and enhancement of feedback control-induced quantum entanglement
IF 2.8 3区 物理与天体物理
The European Physical Journal Plus Pub Date : 2025-02-17 DOI: 10.1140/epjp/s13360-024-05937-y
M. Amazioug, Jia-Xin Peng, D. Dutykh, M. Asjad
{"title":"Emergence and enhancement of feedback control-induced quantum entanglement","authors":"M. Amazioug,&nbsp;Jia-Xin Peng,&nbsp;D. Dutykh,&nbsp;M. Asjad","doi":"10.1140/epjp/s13360-024-05937-y","DOIUrl":"10.1140/epjp/s13360-024-05937-y","url":null,"abstract":"<div><p>We present a scheme for controlling quantum correlations by applying feedback to the cavity mode that exits a cavity while interacting with a mechanical oscillator and magnons. In a hybrid cavity magnomechanical system with a movable mirror, the proposed coherent feedback scheme allows for the enhancement of both bipartite and tripartite quantum correlations. Moreover, we demonstrate that the resulting entanglement remains robust with respect to ambient temperatures in the presence of coherent feedback control.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 2","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143430815","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}
引用次数: 0
Monogamy and polygamy for multi-qudit generalized W-class states based on concurrence of assistance and Tsallis-q entanglement of assistance
IF 2.8 3区 物理与天体物理
The European Physical Journal Plus Pub Date : 2025-02-16 DOI: 10.1140/epjp/s13360-025-06035-3
Wen Zhou, Zhong-Xi Shen, Dong-Ping Xuan, Zhi-Xi Wang, Shao-Ming Fei
{"title":"Monogamy and polygamy for multi-qudit generalized W-class states based on concurrence of assistance and Tsallis-q entanglement of assistance","authors":"Wen Zhou,&nbsp;Zhong-Xi Shen,&nbsp;Dong-Ping Xuan,&nbsp;Zhi-Xi Wang,&nbsp;Shao-Ming Fei","doi":"10.1140/epjp/s13360-025-06035-3","DOIUrl":"10.1140/epjp/s13360-025-06035-3","url":null,"abstract":"<div><p>By analyzing the reduced density matrices derived from a generalized <i>W</i>-class state under any partition, we present new analytical monogamy inequalities satisfied by the <span>(alpha )</span>-th (<span>(alpha ge gamma ,~gamma ge 2)</span>) power and <span>(beta )</span>-th (<span>(0le beta le frac{gamma }{2},~gamma ge 2)</span>) power of the concurrence of assistance for multi-qudit generalized <i>W</i>-class states, which are demonstrated to be tighter than previous studies through detailed examples. Furthermore, using the Tsallis-<i>q</i> entanglement of assistance, we also establish new monogamy and polygamy relations, which are shown to be valid even for multipartite higher-dimensional states that the CKW inequality is violated.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 2","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423358","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}
引用次数: 0
Probing (|V_{td}|) in single-top production at (pe^{mp }) colliders
IF 2.8 3区 物理与天体物理
The European Physical Journal Plus Pub Date : 2025-02-15 DOI: 10.1140/epjp/s13360-025-06050-4
Edier Paredes Cruz, Antonio O. Bouzas, F. Larios
{"title":"Probing (|V_{td}|) in single-top production at (pe^{mp }) colliders","authors":"Edier Paredes Cruz,&nbsp;Antonio O. Bouzas,&nbsp;F. Larios","doi":"10.1140/epjp/s13360-025-06050-4","DOIUrl":"10.1140/epjp/s13360-025-06050-4","url":null,"abstract":"<div><p>We study the consequences for top-quark physics of having electron and positron beams available at the LHeC and FCC-he, as was the case in HERA. We show that the asymmetry between top production in <span>(pe^+)</span> collisions and antitop production in <span>(pe^-)</span> reactions is sensitive to <span>(|V_{td}|)</span>. By means of detailed parton-level Monte Carlo simulations of single <i>t</i> and <span>(bar{t})</span> production and its backgrounds, we parametrize the asymmetry dependence on <span>(|V_{td}|)</span> and estimate its uncertainties. Our analysis includes realistic phase-space cuts and machine-learning binary classifiers for background rejection. We thus obtain limits on <span>(|V_{td}|)</span> that are substantially stronger than current ones and also smaller than current projections for the HL-LHC. We have <span>(|V_{td}| &lt; 1.6times |V_{td}^{textrm{PDG}}|)</span> at the LHeC, at 68% C.L. with <span>(L_{textrm{int}}=2)</span>/ab.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 2","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjp/s13360-025-06050-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422975","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}
引用次数: 0
Theoretical investigation of the Casson hybrid nanofluid flow through a stretching surface with thermal radiation: a biomedical application
IF 2.8 3区 物理与天体物理
The European Physical Journal Plus Pub Date : 2025-02-14 DOI: 10.1140/epjp/s13360-025-06064-y
Gunisetty Ramasekhar, Nehad Ali Shah
{"title":"Theoretical investigation of the Casson hybrid nanofluid flow through a stretching surface with thermal radiation: a biomedical application","authors":"Gunisetty Ramasekhar,&nbsp;Nehad Ali Shah","doi":"10.1140/epjp/s13360-025-06064-y","DOIUrl":"10.1140/epjp/s13360-025-06064-y","url":null,"abstract":"<div><p>Examining the significance of gold and silver nanoparticles submerged in blood under magnetohydrodynamics Casson fluid flow over a stretching surface is the primary objective of the present approach. The fundamental motivation for using gold and silver tiny particles as nanomaterials for therapeutic delivery is their potential to carry drugs and diagnostic characteristics. The potential of hybrid nanofluids in enhancing thermal properties has attracted the interest of several researchers. Hence, the present investigation performed a computational analysis to evaluate the Casson hybrid nanofluid flow through a stretching surface with the presence of magnetohydrodynamic and thermal radiation. Basically, the fluid flow equations are in the form of highly nonlinear coupled partial differential equations. After that by using the similarity variables, we changed partial differential equation into ordinary differential equations and mathematically determined through the bvp5c built in function in MATLAB software. The findings revealed that the higher values of the Casson fluid and magnetic parameters declined in the velocity profiles. Higher values of radiation parameter increased energy profile. Increasing heat generation parameter enhanced energy profile. As a result, the researchers are confident that the new study is unique, will have a considerable influence in the domains of engineering and biomedical, and has the opportunity to encourage new investigators.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 2","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404183","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}
引用次数: 0
Reheating dynamics in inflationary cosmology: insights from (alpha )-attractor and (alpha )-Starobinsky models
IF 2.8 3区 物理与天体物理
The European Physical Journal Plus Pub Date : 2025-02-14 DOI: 10.1140/epjp/s13360-025-06011-x
Gabriel Germán
{"title":"Reheating dynamics in inflationary cosmology: insights from (alpha )-attractor and (alpha )-Starobinsky models","authors":"Gabriel Germán","doi":"10.1140/epjp/s13360-025-06011-x","DOIUrl":"10.1140/epjp/s13360-025-06011-x","url":null,"abstract":"<div><p>Reheating in inflationary cosmology is essential for understanding the early universe, influencing particle production, thermalization, and the primordial power spectrum. Crucial quantities defined during the reheating epoc, such as the equation of state parameter <span>(omega _{re})</span>, reheating temperature <span>(T_{re})</span>, and the number of <i>e</i>-folds <span>(N_{re})</span>, affect inflationary observables like the scalar spectral index <span>(n_s)</span> and the tensor-to-scalar ratio <i>r</i>. We analyze two classes of inflationary models: generalized <span>(alpha )</span>-attractor models and the <span>(alpha )</span>-Starobinsky generalization. These models, motivated by supergravity and string theory, exhibit attractor behavior, ensuring strong predictions and have been studied extensively before. An important novelty of this study, compared to previous works, is the inclusion of an analytical expression for the reheating temperature, <span>(T_{text {re}})</span>, which makes it a dynamical quantity. This is crucial for determining all the cosmological quantities analyzed in this work. Our results show a universal scaling behavior for a tightly bounded <span>(T_{re})</span> in both models. We believe this is the first time that <span>(T_{re})</span> is so closely determined. This work complements previous Bayesian and numerical studies by providing detailed numerical and analytical insights into the evolution of cosmological observables and reheating parameters, offering also constraints on inflationary models based on observational data.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 2","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjp/s13360-025-06011-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423258","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}
引用次数: 0
Cross-section analysis and analyzing power for p-3He system via modified phase–amplitude method
IF 2.8 3区 物理与天体物理
The European Physical Journal Plus Pub Date : 2025-02-13 DOI: 10.1140/epjp/s13360-025-06044-2
B. Swain, D. Naik, U. Laha
{"title":"Cross-section analysis and analyzing power for p-3He system via modified phase–amplitude method","authors":"B. Swain,&nbsp;D. Naik,&nbsp;U. Laha","doi":"10.1140/epjp/s13360-025-06044-2","DOIUrl":"10.1140/epjp/s13360-025-06044-2","url":null,"abstract":"<div><p>As traditional phase function method is no longer a valid tool to calculate phase shifts for scattering involving local plus nonlocal interaction, thus modified phase–amplitude method is adapted to deal with Deng–Fan plus Graz separable potential. The electromagnetic effect is included rigorously to construct a closed-form expression for the scattering phase shifts. The present approach to the problem circumvents in a rather natural way the typical difficulties of incorporating the Coulomb/electromagnetic interaction in a nuclear phase shift calculation. Our approach is demonstrated by calculating the scattering phase shifts and hence differential cross section and proton analyzing power of p-<sup>3</sup>He system which compare well with existing experimental and theoretical data.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 2","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404246","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}
引用次数: 0
Diffusion and turbulence in phase-space and formation of phase-space vortices 相空间中的扩散和湍流以及相空间涡流的形成
IF 2.8 3区 物理与天体物理
The European Physical Journal Plus Pub Date : 2025-02-13 DOI: 10.1140/epjp/s13360-025-05995-w
Allen Lobo, Vinod Kumar Sayal
{"title":"Diffusion and turbulence in phase-space and formation of phase-space vortices","authors":"Allen Lobo,&nbsp;Vinod Kumar Sayal","doi":"10.1140/epjp/s13360-025-05995-w","DOIUrl":"10.1140/epjp/s13360-025-05995-w","url":null,"abstract":"<div><p>In this work, the recently introduced fluid-like treatment of the phase-space (Lobo and Sayal in PP 31:092301, 2024), termed as the phase-space hydrodynamic model, has been further extended, and some interesting outcomes have been presented. A modified form of the Vlasov equation has been presented, which describes the diffusion of the phase-space density. This anisotropic diffusion is analysed, and the diffusive flow of the phase-space probability field is shown. Growth of phase-space vortices is then shown due to increased turbulent-like flow, which is marked by the dominating inertial flow above the diffusive flow. The nature of this flow is judged by using a parameter for the phase-space. It is then shown that the formation of phase-space vortices is due to growth of turbulent-like flow in the phase-space. On the bases of the diffusion parameters, the vorticity field transport of the hydrodynamic phase-space is studied and a Schamel–KdV form of the vorticity transport equation is derived, suggesting solitary modes of the phase-space vorticity waves.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 2","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143396636","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}
引用次数: 0
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信