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On the Featutrs of Double-Wire Vibrating Wire Monitor 浅谈双线振动线监测仪的特点
IF 0.6 4区 物理与天体物理
Journal of Contemporary Physics (Armenian Academy of Sciences) Pub Date : 2023-07-14 DOI: 10.1134/S1068337223020135
G. V. Mirzoyan, L. Spottek, S. G. Arutunian, A. V. Margaryan, E. G. Lazareva, L. M. Lazarev, G. S. Harutyunyan, A. S. Vardanyan, M. Chung
{"title":"On the Featutrs of Double-Wire Vibrating Wire Monitor","authors":"G. V. Mirzoyan,&nbsp;L. Spottek,&nbsp;S. G. Arutunian,&nbsp;A. V. Margaryan,&nbsp;E. G. Lazareva,&nbsp;L. M. Lazarev,&nbsp;G. S. Harutyunyan,&nbsp;A. S. Vardanyan,&nbsp;M. Chung","doi":"10.1134/S1068337223020135","DOIUrl":"10.1134/S1068337223020135","url":null,"abstract":"<p>The vibrating wire monitors are used for measuring transverse pro-files of radiation beams of different nature. For increasing the accuracy of scanning, and in some cases escaping the scanning procedure (measurement of the beam profile using a matrix of wires), it is proposed to use several vibrating wires. A monitor of this kind with two vibrating wires spaced apart at some distance formed the measuring unit of the laboratory stand, developed by us for training students in accelerator technology. The features of such a two-wire monitor and, in particular, the problem of laser radiation power redistribution between the wires are discussed.</p>","PeriodicalId":623,"journal":{"name":"Journal of Contemporary Physics (Armenian Academy of Sciences)","volume":"58 2","pages":"122 - 128"},"PeriodicalIF":0.6,"publicationDate":"2023-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4577141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Entangled Field States in Terms of Quadrature Amplitudes in the Process of Nondegenerate Parametric Decay in an Optical Cavity 光学腔中非简并参量衰减过程中用正交振幅表示的纠缠场态
IF 0.6 4区 物理与天体物理
Journal of Contemporary Physics (Armenian Academy of Sciences) Pub Date : 2023-07-14 DOI: 10.1134/S106833722302010X
S. T. Gevorgyan, M. S. Gevorgyan
{"title":"Entangled Field States in Terms of Quadrature Amplitudes in the Process of Nondegenerate Parametric Decay in an Optical Cavity","authors":"S. T. Gevorgyan,&nbsp;M. S. Gevorgyan","doi":"10.1134/S106833722302010X","DOIUrl":"10.1134/S106833722302010X","url":null,"abstract":"<p>For the process of nondegenerate parametric decay in an optical cavity in which a photon with energy <span>(hbar {{{{omega }}}_{3}})</span> decays into two photons with energies <span>(hbar {{{{omega }}}_{2}})</span> and <span>(hbar {{{{omega }}}_{1}})</span>, where <span>(hbar {{{{omega }}}_{3}} = hbar {{{{omega }}}_{2}} + hbar {{{{omega }}}_{1}},)</span> the possibility of forming entangled field states of the interacting modes of the optical system based on the variable of quadrature amplitudes is studied. It is shown that strongly entangled states are obtained between the modes with the frequencies <span>({{{{omega }}}_{2}})</span> and <span>({{{{omega }}}_{1}})</span> in the case of a very strong coupling of the interacting modes. Weakly entangled states are formed in the case of strong coupling between modes, and no entanglement of these modes occurs in the case of weak coupling. In the optical system, the entangled states by the variable of quadrature amplitude do not form for the modes with frequencies <span>({{{{omega }}}_{3}})</span> and <span>({{{{omega }}}_{1}})</span>.</p>","PeriodicalId":623,"journal":{"name":"Journal of Contemporary Physics (Armenian Academy of Sciences)","volume":"58 2","pages":"140 - 146"},"PeriodicalIF":0.6,"publicationDate":"2023-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4577143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 γ-Irradiation on the Semitransparent Gray Color Obsidian in the 5 to 500 kGy Range γ-辐照对5 ~ 500 kGy范围内半透明灰色黑曜石的影响
IF 0.6 4区 物理与天体物理
Journal of Contemporary Physics (Armenian Academy of Sciences) Pub Date : 2023-07-14 DOI: 10.1134/S1068337223020020
N. R. Aghamalyan, I. A. Ghambaryan, E. A. Kafadaryan, M. N. Nersisyan, H. T. Gyulasaryan, G. N. Chilingaryan
{"title":"Effect of γ-Irradiation on the Semitransparent Gray Color Obsidian in the 5 to 500 kGy Range","authors":"N. R. Aghamalyan,&nbsp;I. A. Ghambaryan,&nbsp;E. A. Kafadaryan,&nbsp;M. N. Nersisyan,&nbsp;H. T. Gyulasaryan,&nbsp;G. N. Chilingaryan","doi":"10.1134/S1068337223020020","DOIUrl":"10.1134/S1068337223020020","url":null,"abstract":"<p>Semitransparent gray color obsidian samples (bulk and powder) were irradiated at room temperature by Co<sup>60</sup> radiation source with the γ-photon average energy of 1.25 MeV and different doses from 5 to ~500 kGy. It is known that γ-irradiation influences the optical properties of glass materials depending on the composition as well as on the presence of defects in the glass matrix. Analysis of obsidian samples was carried out by absorption and reflection spectroscopy in the UV, visible, and IR ranges, as well as by EPR measurements for characterization of semitransparent gray color obsidian depending on the γ-irradiation of different doses. The difference in transmittance spectra between the pristine sample and those irradiated with different doses made it possible to distinguish three absorption bands at 368, 386, and 442 nm, which are responsible for Fe<sup>3+</sup> ions in different environments. The content of hydroxyl OH groups, determined from the absorption in the band at ~4500 cm<sup>–1</sup>, does not change in the range of used doses. The EPR measurements showed three signals with <i>g</i>-factors of ~6.0, ~4.2, and ~2.0 characteristic for Fe<sup>3+</sup> ions, the intensities of which increase with increasing irradiation doses. Obsidian turned out to be resistant to the formation of NBOHC paramagnetic defects in the region of the indicated doses of γ-irradiation.</p>","PeriodicalId":623,"journal":{"name":"Journal of Contemporary Physics (Armenian Academy of Sciences)","volume":"58 2","pages":"172 - 178"},"PeriodicalIF":0.6,"publicationDate":"2023-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4577581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
X-Ray Three-Crystal Interferometer with Manual Control 手动控制x射线三晶干涉仪
IF 0.6 4区 物理与天体物理
Journal of Contemporary Physics (Armenian Academy of Sciences) Pub Date : 2023-07-14 DOI: 10.1134/S1068337223020081
H. R. Drmeyan, K. G. Trouni, T. R. Muradyan, A. V. Shahverdyan
{"title":"X-Ray Three-Crystal Interferometer with Manual Control","authors":"H. R. Drmeyan,&nbsp;K. G. Trouni,&nbsp;T. R. Muradyan,&nbsp;A. V. Shahverdyan","doi":"10.1134/S1068337223020081","DOIUrl":"10.1134/S1068337223020081","url":null,"abstract":"<p>An X-ray three-block interferometer with a thin neck between the analyzer and mirror blocks is designed. The mutual arrangement of these blocks is changed with the help of levers with weights at the ends, which made it possible to rotate the analyzer block with the splitter blocks (S) and the mirror block fixed. Sectional topograms of interference patterns at different torques show that rotational moiré prevails in the recorded moiré patterns. With an increase in the mechanical torque, the period of the moiré fringes increases; at some moment, the moiré pattern disappears, and the interference field becomes uniform, which means that the interferometer becomes an “ideal”: further increase in the torque results in the appearance of a rotational moiré with a change in the sign of the slope of the interference fringes. A theoretical interpretation of all observed phenomena is given.</p>","PeriodicalId":623,"journal":{"name":"Journal of Contemporary Physics (Armenian Academy of Sciences)","volume":"58 2","pages":"193 - 197"},"PeriodicalIF":0.6,"publicationDate":"2023-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4576071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1
Study of Ultraviolet Irradiation Effect on the ZnO:Tb Thin Films Characteristics 紫外光照射对ZnO:Tb薄膜特性影响的研究
IF 0.6 4区 物理与天体物理
Journal of Contemporary Physics (Armenian Academy of Sciences) Pub Date : 2023-07-14 DOI: 10.1134/S1068337223020172
E. P. Zaretskaya, V. F. Gremenok, V. V. Malyutina-Bronskaya, A. S. Musayelyan, S. G. Petrosyan
{"title":"Study of Ultraviolet Irradiation Effect on the ZnO:Tb Thin Films Characteristics","authors":"E. P. Zaretskaya,&nbsp;V. F. Gremenok,&nbsp;V. V. Malyutina-Bronskaya,&nbsp;A. S. Musayelyan,&nbsp;S. G. Petrosyan","doi":"10.1134/S1068337223020172","DOIUrl":"10.1134/S1068337223020172","url":null,"abstract":"<p>Single phase and highly transparent ZnO:Tb films with a Tb concentration from 0.41 at% up to 0.78 аt% were formed on glass and silicon substrates by sol-gel deposition. The influence of ultraviolet radiation on the structural and photoelectric characteristics of <i>n</i>-ZnO:Tb/<i>n</i>-Si structures has been studied. The appearance of a photoelectric effect under the influence of a bias voltage and UV radiation (405 and 278 nm) was established, with an increase in photo effect when irradiated with shorter wavelength UV radiation (278 nm). It was shown that the concentration of the Tb<sup>3+</sup> dopant is the determining factor for increasing the UV photosensitivity of the structures. The experimentally established selective sensitivity of <i>n</i>-ZnO:Tb/<i>n</i>-Si structures to UV radiation with a wavelength of less than 405 nm demonstrates the possibility of their use in UV radiation detectors or sun-blind detectors.</p>","PeriodicalId":623,"journal":{"name":"Journal of Contemporary Physics (Armenian Academy of Sciences)","volume":"58 2","pages":"147 - 154"},"PeriodicalIF":0.6,"publicationDate":"2023-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4574722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Evaluating the Depth of Water Medium Probing Using a Magnetic-Field Radiofrequency Probe Based on a Single-Layer Flat Coil 基于单层扁平线圈的磁场射频探头对水介质探测深度的评价
IF 0.6 4区 物理与天体物理
Journal of Contemporary Physics (Armenian Academy of Sciences) Pub Date : 2023-07-14 DOI: 10.1134/S1068337223020111
S. A. Khachunts
{"title":"Evaluating the Depth of Water Medium Probing Using a Magnetic-Field Radiofrequency Probe Based on a Single-Layer Flat Coil","authors":"S. A. Khachunts","doi":"10.1134/S1068337223020111","DOIUrl":"10.1134/S1068337223020111","url":null,"abstract":"<p>The adequate depth of sensing the aquatic environment by a sensor based on a single-layer flat coil was studied. A radiofrequency sensor of the ~40–50 MHz range with a diameter of the sensitive element (a flat coil) of ~8 mm was used. Plastic cuvettes filled with distilled water placed in front of the sensor were used as the test medium, the number of which was sequentially increased. The frequency of the sensor was measured depending on the number of cuvettes placed in front of the sensor. The character of changes in the registered frequency of the sensor depending on the thickness of the aqueous layer selected as the medium was revealed.</p>","PeriodicalId":623,"journal":{"name":"Journal of Contemporary Physics (Armenian Academy of Sciences)","volume":"58 2","pages":"179 - 183"},"PeriodicalIF":0.6,"publicationDate":"2023-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4576730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Entangled Field States in the Process of Nondegenerate Parametric Decay in an Optical Cavity 光学腔中非简并参量衰减过程中的纠缠场态
IF 0.6 4区 物理与天体物理
Journal of Contemporary Physics (Armenian Academy of Sciences) Pub Date : 2023-06-18 DOI: 10.1134/S1068337223010115
S. T. Gevorgyan, M. S. Gevorgyan
{"title":"Entangled Field States in the Process of Nondegenerate Parametric Decay in an Optical Cavity","authors":"S. T. Gevorgyan,&nbsp;M. S. Gevorgyan","doi":"10.1134/S1068337223010115","DOIUrl":"10.1134/S1068337223010115","url":null,"abstract":"<p>For the process of non-degenerate parametric decay in an optical cavity, where a photon with energy <i>ћ</i>ω<sub>3</sub> decays into two photons with energies <i>ћ</i>ω<sub>2</sub> and <i>ћ</i>ω<sub>1</sub>, where <i>ћ</i>ω<sub>3</sub> = <i>ћ</i>ω<sub>2</sub> + <i>ћ</i>ω<sub>1</sub>, the possibility of formation of entangled field states in terms of photon number variables between interacting modes of the optical system is investigated. Strong entangled states are shown between the modes with frequencies ω<sub>2</sub> and ω<sub>1</sub> in the case of strong coupling between interacting modes. In the case of weak and very strong coupling between these modes, relatively weak entangled states are formed. In the case of weak coupling, these modes are localized in entangled vacuum states with low values of quantum entropy. For modes with frequencies ω<sub>3</sub> and ω<sub>1</sub>etangled states are formed only in the case of strong coupling.</p>","PeriodicalId":623,"journal":{"name":"Journal of Contemporary Physics (Armenian Academy of Sciences)","volume":"58 1","pages":"52 - 58"},"PeriodicalIF":0.6,"publicationDate":"2023-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4725854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Spectral Study of the Binding of TMetAlPyP3 and ZnTMetAlPyP3 Porphyrins to DNA TMetAlPyP3和ZnTMetAlPyP3卟啉与DNA结合的光谱研究
IF 0.6 4区 物理与天体物理
Journal of Contemporary Physics (Armenian Academy of Sciences) Pub Date : 2023-06-18 DOI: 10.1134/S106833722301005X
L. R. Aloyan, A. A. Avetisyan
{"title":"Spectral Study of the Binding of TMetAlPyP3 and ZnTMetAlPyP3 Porphyrins to DNA","authors":"L. R. Aloyan,&nbsp;A. A. Avetisyan","doi":"10.1134/S106833722301005X","DOIUrl":"10.1134/S106833722301005X","url":null,"abstract":"<p>In this work, according to the data obtained from the induced circular dichroism spectra, the studied porphyrin binds to DNA by the intercalation method, and its Zn-containing analog by the externally ordered interaction was revealed. The absorption spectra of the studied complexes were obtained at different DNA concentrations, and the binding parameters (<i>K</i><sub>b</sub>, <i>n</i>) of porphyrins with DNA were computed from the data at two values of the ionic strength of the solution. It is shown that the places for binding porphyrins become less accessible at a higher ionic strength of the solution. An increase in the melting temperature of DNA in the presence of a metal-containing porphyrin is also observed, as well as a decrease in the stabilizing effect of porphyrins for an increase in the ionic strength of the solution.</p>","PeriodicalId":623,"journal":{"name":"Journal of Contemporary Physics (Armenian Academy of Sciences)","volume":"58 1","pages":"99 - 103"},"PeriodicalIF":0.6,"publicationDate":"2023-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4723324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Preparation and Investigation of Vacuum-Deposited CH3NH3PbI3 – xClx Perovskite Films on Black Silicon 黑硅上真空沉积CH3NH3PbI3 - xClx钙钛矿薄膜的制备与研究
IF 0.6 4区 物理与天体物理
Journal of Contemporary Physics (Armenian Academy of Sciences) Pub Date : 2023-06-18 DOI: 10.1134/S1068337223010024
G. Y. Ayvazyan, L. A. Hakhoyan, H. R. Dashtoyan, L. A. Matevosyan
{"title":"Preparation and Investigation of Vacuum-Deposited CH3NH3PbI3 – xClx Perovskite Films on Black Silicon","authors":"G. Y. Ayvazyan,&nbsp;L. A. Hakhoyan,&nbsp;H. R. Dashtoyan,&nbsp;L. A. Matevosyan","doi":"10.1134/S1068337223010024","DOIUrl":"10.1134/S1068337223010024","url":null,"abstract":"<p>The technology of vacuum co-deposition and sequential deposition of the mixed-halide perovskite films (CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3–<i>x</i></sub>Cl<sub><i>x</i></sub>) has been optimized. The possibility of improving the thermal stability of films by adding cesium atoms to an inorganic precursor is demonstrated. The structural and optical properties of perovskite films on black silicon are synthesized and investigated. It is shown that films of high quality in structure and phase composition are formed, which are characterized by a low reflection coefficient in a wide range of radiation wavelengths. Vacuum-deposited perovskite films on black silicon have great potential for the development of high-efficiency tandem solar cells.</p>","PeriodicalId":623,"journal":{"name":"Journal of Contemporary Physics (Armenian Academy of Sciences)","volume":"58 1","pages":"85 - 91"},"PeriodicalIF":0.6,"publicationDate":"2023-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4727277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 2
111In Isotope Production on Tin Target 锡靶的同位素生产
IF 0.6 4区 物理与天体物理
Journal of Contemporary Physics (Armenian Academy of Sciences) Pub Date : 2023-06-18 DOI: 10.1134/S1068337223010152
G. V. Martirosyan
{"title":"111In Isotope Production on Tin Target","authors":"G. V. Martirosyan","doi":"10.1134/S1068337223010152","DOIUrl":"10.1134/S1068337223010152","url":null,"abstract":"<p><sup>111</sup>In is an important diagnostic medical radioisotope. We discuss the possibility of its production from <sup>114</sup>Sn and <sup>112</sup>Sn targets in proton-induced reactions. Analysis made on the base of TALYS-1.95 calculations. While the irradiation of <sup>114</sup>Sn target leads to unfeasibly low yield of <sup>111</sup>In, <sup>112</sup>Sn(<i>p</i>, <i>x</i>) production route is promising because of high yields of indirect production channels. According to simulation results, the yield of <sup>111</sup>In in <sup>112</sup>Sn(<i>p</i>, <i>x</i>) reactions is higher than in the commercially used reaction <sup>111</sup>Cd(<i>p</i>, <i>n</i>)<sup>111</sup>In and is comparable to yield in <sup>112</sup>Cd(<i>p</i>, 2<i>n</i>)<sup>111</sup>In reaction.</p>","PeriodicalId":623,"journal":{"name":"Journal of Contemporary Physics (Armenian Academy of Sciences)","volume":"58 1","pages":"1 - 5"},"PeriodicalIF":0.6,"publicationDate":"2023-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4727563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
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