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Turkish Journal of Physics最新文献

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A hard X-ray self-amplified spontaneous emission free-electron laser optimizationusing evolutionary algorithms for dedicated user applications 硬x射线自放大自发发射自由电子激光优化使用进化算法的专用用户应用
IF 2.1
Turkish Journal of Physics Pub Date : 2019-12-01 DOI: 10.3906/fiz-1909-5
Didem Ketenoglu, E. Bostanci, A. Aydin, B. Ketenoglu
{"title":"A hard X-ray self-amplified spontaneous emission free-electron laser optimizationusing evolutionary algorithms for dedicated user applications","authors":"Didem Ketenoglu, E. Bostanci, A. Aydin, B. Ketenoglu","doi":"10.3906/fiz-1909-5","DOIUrl":"https://doi.org/10.3906/fiz-1909-5","url":null,"abstract":"Accelerator-based fourth-generation light sources are utilized in a wide range of interdisciplinary applications such as nanotechnology, materials science, biosciences, and medicine. A hard X-ray free-electron laser (FEL), as a state-of-the-art light source, was optimized using evolutionary algorithms for dedicated user applications such as X-ray Raman scattering (XRS), resonant inelastic X-ray scattering (RIXS), and X-ray emission spectroscopies (XES). Optimal parameter sets were obtained for an in-vacuum planar undulator driven by an 8 GeV electron beam. Performance parameters of self-amplified spontaneous emission (SASE) operation (i.e. optimized SASE performance parameters through evolutionary algorithms) were found to be consistent with operating X-ray FEL facilities around the world. It is shown that FEL characteristics for specific user experiments can be optimized by finding several evolutionary algorithm solutions within the range of 5 keV to 10 keV.","PeriodicalId":46003,"journal":{"name":"Turkish Journal of Physics","volume":"43 1","pages":"551-555"},"PeriodicalIF":2.1,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43768243","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
Thermodynamic properties of V, Cr, Mo, and Fe metals and their binary alloys V、Cr、Mo和Fe金属及其二元合金的热力学性质
IF 2.1
Turkish Journal of Physics Pub Date : 2019-12-01 DOI: 10.3906/fiz-1906-12
T. Akande, F. Matthew-Ojelabi, G. Agunbiade, E. Faweya
{"title":"Thermodynamic properties of V, Cr, Mo, and Fe metals and their binary alloys","authors":"T. Akande, F. Matthew-Ojelabi, G. Agunbiade, E. Faweya","doi":"10.3906/fiz-1906-12","DOIUrl":"https://doi.org/10.3906/fiz-1906-12","url":null,"abstract":"The interactions between distinctive alloying elements have been scrutinized through atomistic investigation for essential material selection. The tight-binding model was applied to compute the thermodynamic properties of V, Cr, Mo, and Fe metals and their binary alloys. The calculated results agree with the accessible experiment in some cases, while some are closer in agreement with the experiment. The minimum formation enthalpies observed are -17.80, -15.20, -13.10, -11.50, and -0.90 eV for Cr-Mo, Cr-V, Fe-V, V-Fe, and Mo-Cr, respectively. The Cr-Mo alloy is the most stable of all the selected alloys with the least formation enthalpy. For the alloy structure, bcc phases were observed for $V_{0.50}{Cr}_{0.50}{,, , V}_{0.01}{Mo}_{0.99}$, $V_{0.50}{Fe}_{0.50},, , $and ${Cr}_{0.01}{Mo}_{0.99}$ alloys with values of VEC of textless 6.87. Furthermore, fcc and bcc coexist for ${Cr}_{0.50}{Fe}_{0.50}$ and ${Mo}_{0.50}{Fe}_{0.50}$ alloys, which have VEC values between 6.87 and 8.","PeriodicalId":46003,"journal":{"name":"Turkish Journal of Physics","volume":"43 1","pages":"606-617"},"PeriodicalIF":2.1,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3906/fiz-1906-12","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42228682","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
Chemical synthesis of zinc oxide nanorods and their transformation intonanotubes 氧化锌纳米棒的化学合成及其向纳米管的转化
IF 2.1
Turkish Journal of Physics Pub Date : 2019-12-01 DOI: 10.3906/fiz-1905-4
P. Samanta
{"title":"Chemical synthesis of zinc oxide nanorods and their transformation intonanotubes","authors":"P. Samanta","doi":"10.3906/fiz-1905-4","DOIUrl":"https://doi.org/10.3906/fiz-1905-4","url":null,"abstract":"A simple wet chemical method was successfully deployed to synthesize zinc oxide nanorods and nanotubes of hexagonal morphology. Energy dispersive X-ray spectroscopy confirmed the formation of ZnO with almost equal atomic percentages of Zn and O atoms. The FESEM images confirmed the formation of ZnO nanorods and nanotubes of length 1.5 to 2 $mu $m and diameter 500 nm to 1 $mu $m. The growth of the nanorods saturated under the combined effect of ionic association of Zn$^{2+}$ and OH$^{-}$ ions, Gibbs' energy of the reaction, reaction temperature, and the enthalpy of the system. Further stirring led to dissolution resulting in coarse edges on the top of the nanorods and finally hollow nanotubes were formed. The synthesized ZnO nanotubes exhibited strong photoluminescence at 649 nm owing to the holes trapped at $mathrm{V}_{mathrm{O}}^{mathrm{++}}$ states and the conduction band edge.","PeriodicalId":46003,"journal":{"name":"Turkish Journal of Physics","volume":"43 1","pages":"576-581"},"PeriodicalIF":2.1,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3906/fiz-1905-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45716989","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
Quality control of silicon pixel wafers for the CMS Phase-1 pixel upgrade CMS第一期像元升级硅像元晶片的品质控制
IF 2.1
Turkish Journal of Physics Pub Date : 2019-12-01 DOI: 10.3906/fiz-1907-2
K. Dilsiz, S. Durgut, K. Yi, L. Spiegel
{"title":"Quality control of silicon pixel wafers for the CMS Phase-1 pixel upgrade","authors":"K. Dilsiz, S. Durgut, K. Yi, L. Spiegel","doi":"10.3906/fiz-1907-2","DOIUrl":"https://doi.org/10.3906/fiz-1907-2","url":null,"abstract":"The CMS detector at the CERN Large Hadron Collider features as its innermost component a silicon pixel detector. The original pixel detector was completely replaced during the 2016-2017 winter technical stop. One of the goals of this Phase-1 Upgrade of the pixel detector was to replace the sensors in the original CMS forward pixel detector with new, unirradiated sensors. The new CMS forward pixel detector must survive an integrated luminosity of 300 fb$^{-1}$ before being replaced again prior to the High-Luminosity LHC era. Just as in the original construction, the Phase-1 forward pixel sensors were made of n$^{+}$-in-n Diffusion Oxygenated Float Zone silicon. This note documents the quality spot-checking of the new sensors, comparing our results with those provided by the vendor. In general there was good agreement between the results.","PeriodicalId":46003,"journal":{"name":"Turkish Journal of Physics","volume":"43 1","pages":"541-550"},"PeriodicalIF":2.1,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46013608","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
Relativistic dynamics of a scalar boson confined by Woods–Saxon potential in anucleus 核子中受Woods-Saxon势限制的标量玻色子的相对论动力学
IF 2.1
Turkish Journal of Physics Pub Date : 2019-12-01 DOI: 10.3906/fiz-1905-28
N. Candemir
{"title":"Relativistic dynamics of a scalar boson confined by Woods–Saxon potential in anucleus","authors":"N. Candemir","doi":"10.3906/fiz-1905-28","DOIUrl":"https://doi.org/10.3906/fiz-1905-28","url":null,"abstract":"We undertook a theoretical study of a scalar boson confined by Woods-Saxon potential in a nucleus via the Duffin-Kemmer-Petiau equation. We analytically obtained the eigenvectors and energy levels through the hypergeometric functions. Single-particle energy levels of a boson in the ${}^{208} {Pb}$ nucleus were calculated numerically.","PeriodicalId":46003,"journal":{"name":"Turkish Journal of Physics","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3906/fiz-1905-28","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43054399","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
Ab Initio atomistic thermodynamics modeling of adsorption of oxygen on gold and gold-silver surfaces 氧在金和金银表面吸附的从头算原子热力学模型
IF 2.1
Turkish Journal of Physics Pub Date : 2019-10-01 DOI: 10.3906/fiz-1905-31
M. Sensoy
{"title":"Ab Initio atomistic thermodynamics modeling of adsorption of oxygen on gold and gold-silver surfaces","authors":"M. Sensoy","doi":"10.3906/fiz-1905-31","DOIUrl":"https://doi.org/10.3906/fiz-1905-31","url":null,"abstract":"A theoretical study of oxygen adsorption on gold and gold-silver surfaces by means of density functional theory (DFT) calculations with an atomistic thermodynamic model is performed. The (111) and (211) facets of gold and gold-silver alloy surfaces are considered, and their stabilization is discussed upon adsorption of oxygen depending on O and Ag coverage. The details of how the DFT-based atomistic thermodynamic model can apply to the transition metal surface are also presented in this work.","PeriodicalId":46003,"journal":{"name":"Turkish Journal of Physics","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3906/fiz-1905-31","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47925424","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
CCD UBVRI photometry of the open cluster Berkeley 8 疏散星团伯克利8的CCD UBVRI光度测定
IF 2.1
Turkish Journal of Physics Pub Date : 2019-08-15 DOI: 10.3906/fiz-1906-6
Hikmet cCakmak, R. Michel, Yuksel Karatacs
{"title":"CCD UBVRI photometry of the open cluster Berkeley 8","authors":"Hikmet cCakmak, R. Michel, Yuksel Karatacs","doi":"10.3906/fiz-1906-6","DOIUrl":"https://doi.org/10.3906/fiz-1906-6","url":null,"abstract":"The poorly studied Berkeley 8 (Be8) open cluster is analysed from CCD UBVRI photometric data taken with the 0.90 m telescope at the Sierra Nevada Observatory. The Z = +0.008 PARSEC isochrone gave us a reddening of E(B-V) = 0.69 +- 0.03, a distance of 3410 +- 300 pc and an age of 2.8 +- 0.2 Gyr. Its median Gaia DR2 distance, d = 3676 +- 810 pc is in good agreement with our photometric distances, 3410 - 3620 pc within the uncertainties. The kinematic parameters of five likely members of Be 8 with the circular orbits, ecc = [0.23, 0.30] reflect the properties of the Galactic thin disc, which is also consistent with what is expected of its metal content ([M/H] = -0.27). Be8 with R > 9 kpc (co-rotation gap at 9 kpc) may have been originating from different galactic radius or different star formation region.","PeriodicalId":46003,"journal":{"name":"Turkish Journal of Physics","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2019-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3906/fiz-1906-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46931011","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
First photometric investigation of some ASAS binary systems 一些反卫星双星系统的首次光度研究
IF 2.1
Turkish Journal of Physics Pub Date : 2019-08-02 DOI: 10.3906/fiz-1903-17
B. Ulaş
{"title":"First photometric investigation of some ASAS binary systems","authors":"B. Ulaş","doi":"10.3906/fiz-1903-17","DOIUrl":"https://doi.org/10.3906/fiz-1903-17","url":null,"abstract":"We present the first light curve solutions of the four binary systems observed and catalogued by the All Sky Automated Survey program. The light curves are analysed by using PHOEBE software, which is based on the Wilson-Devinney method. The light curve parameters are derived and the estimated physical parameters are calculated from the result of the analyses. We compare our targets to well-known binaries of similar type on the Hertzsprung-Russell diagram and mass-radius plane. The evolutionary states of the components are also discussed.","PeriodicalId":46003,"journal":{"name":"Turkish Journal of Physics","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2019-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44983651","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
Determination of fluence rate distribution in a multilayered skin tissue model byusing Monte Carlo simulations 利用蒙特卡罗模拟确定多层皮肤组织模型中的通量分布
IF 2.1
Turkish Journal of Physics Pub Date : 2019-06-01 DOI: 10.3906/FIZ-1902-8
H. Arslan, Bahar Pehli̇vanöz
{"title":"Determination of fluence rate distribution in a multilayered skin tissue model byusing Monte Carlo simulations","authors":"H. Arslan, Bahar Pehli̇vanöz","doi":"10.3906/FIZ-1902-8","DOIUrl":"https://doi.org/10.3906/FIZ-1902-8","url":null,"abstract":"Information on light-tissue interaction is important for clinical applications of lasers. The Monte Carlo technique is one of the commonly used methods to simulate photon propagation and to describe energy absorption in biological tissues. In this study, fluence rate distributions of 633 nm and 830 nm light inside a multilayered skin tissue model have been investigated by using two different simulation software programs: GAMOS tissue optics plug-in and MCML. Results of the plug-in for the fluence rate distributions are in very good agreement with the ones from MCML for both of the wavelengths. This shows that GAMOS tissue optics plug-in can be utilized in simulation studies on the interaction of light in the phototherapeutic window within multilayered tissue models.","PeriodicalId":46003,"journal":{"name":"Turkish Journal of Physics","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3906/FIZ-1902-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48314335","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
Application of the fractional oscillator model to describe damped vibrations 分数振子模型在阻尼振动描述中的应用
IF 2.1
Turkish Journal of Physics Pub Date : 2019-06-01 DOI: 10.3906/FIZ-1811-16
S. Rekhviashvili, A. Pskhu, P. Agarwal, Shilpi Jain
{"title":"Application of the fractional oscillator model to describe damped vibrations","authors":"S. Rekhviashvili, A. Pskhu, P. Agarwal, Shilpi Jain","doi":"10.3906/FIZ-1811-16","DOIUrl":"https://doi.org/10.3906/FIZ-1811-16","url":null,"abstract":"We consider a model of damped vibrations based on fractional differentiation. The model given is completely consistent with the classical model of vibration with viscous damping. We find the relation between the order of fractional differentiation in the equation of motion and Q-factor of an oscillator. The proposed approach seems more appropriate for the physical nature of the described system. The experiment with a vibrating piezoelectric plate, performed as part of the study, showed good agreement with the model and confirmed that the fractional oscillator model can be used to describe strongly damped vibrations.","PeriodicalId":46003,"journal":{"name":"Turkish Journal of Physics","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3906/FIZ-1811-16","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46608765","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: 61
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