East European Journal of Physics最新文献

Spectral and Timing Study of the Newly Detected Ultraluminous X-Ray Sources in NGC 3585 Using Different Chandra Observations. 利用不同的钱德拉观测对 NGC 3585 中新探测到的超光速 X 射线源进行光谱和时间研究。

IF 0.4

East European Journal of Physics Pub Date : 2023-12-02 DOI: 10.26565/2312-4334-2023-4-02

S. R. Devi, A. S. Devi, A. Deshamukhya

{"title":"Spectral and Timing Study of the Newly Detected Ultraluminous X-Ray Sources in NGC 3585 Using Different Chandra Observations.","authors":"S. R. Devi, A. S. Devi, A. Deshamukhya","doi":"10.26565/2312-4334-2023-4-02","DOIUrl":"https://doi.org/10.26565/2312-4334-2023-4-02","url":null,"abstract":"The present work aims to study the previously unstudied Ultraluminous X-ray sources (ULXs) in the galaxy NGC 3585 at its various epochs of Chandra observation. We report here the detection of two new ULXs viz. CXOUJ111306.0-264825 (X-1) and CXOUJ111325.3-264732 (X-2) with their bolometric luminosity > 1039erg s−1 in its various Chandra observations. X-1 was found to be a spectrally hard ULX in both the epochs where it was detected. However in the ULX, X-2, a slight hardening of the spectra was observed within a period of 17 years. Assuming isotropic emission and explained by disk blackbody model, the spectrally softer epoch of X-2 with an inner disk temperature, kTin ∼ 0.79 keV and bolometric luminosity ∼ 2.51 × 1039erg s−1 implies for X-2 to be powered by a compact object, necessarily a black hole of mass, MBH ∼ 44.85+82.11−25.92M⊙ accreting at ∼ 0.42 times the Eddington limit. The Lightcurve of X-1 and X-2 binned at 500s, 1ks, 2ks and 4ks has shown no signature of short-term variability in both the ULXs in kilo-seconds time scales. Overall, both the detected ULXs seem to be almost static sources both in long-term (years) as well as short-term (kilo-seconds) time scales with the presently available Chandra Observations.","PeriodicalId":42569,"journal":{"name":"East European Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2023-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139187529","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

The Contributions to Registration Efficiency of The Fast Neutron Reactions on The Nuclei of The Heavy Oxide Scintillators 重氧化物闪烁体核上的快中子反应对登记效率的贡献

IF 0.4

East European Journal of Physics Pub Date : 2023-12-02 DOI: 10.26565/2312-4334-2023-4-46

G. Onyshchenko, B. Grynyov, Ivan I. Yakymenko, Sergey V. Naydenov, P. Kuznietsov, Oleksandr Shchus

{"title":"The Contributions to Registration Efficiency of The Fast Neutron Reactions on The Nuclei of The Heavy Oxide Scintillators","authors":"G. Onyshchenko, B. Grynyov, Ivan I. Yakymenko, Sergey V. Naydenov, P. Kuznietsov, Oleksandr Shchus","doi":"10.26565/2312-4334-2023-4-46","DOIUrl":"https://doi.org/10.26565/2312-4334-2023-4-46","url":null,"abstract":"The results of the study of the contributions of the interaction reactions of fast neutron sources of 239Pu-Be and 252Cf to the counting efficiency of registration by oxide scintillators CdWO4, ZnWO4, Bi4Ge3O12 and Gd2SiO5, presented. The amount of gamma quanta per input neutron emitted from final nuclei excited in the reactions of inelastic scattering (n, nʹγ)in, resonant scattering (n, n)res and capture (n, γ)res and radiation capture (n, γ)cap was measured. PMT R1307 operating in single-electron mode was used as a photodetector, the background rate was ~ 5*103 s-1. The measured efficiency ε for scintillators ø40x40 mm was 752 for ZWO, 532 for CWO, 37 for GSO, and 23 for BGO in \"counts/neutron\" units, measurement error rate ~ 3-5%. The formation of the detector response is influenced by the parameters of the scintillator nuclei, such as the values of the interaction cross sections in the resonance region, the density of nuclear levels of the final nuclei, the lifetime of excited nuclear states, the upper limit of the resonance region of the cross section, as well as the scintillation time and geometric parameters of the scintillators. A phenomenological model of the response of an oxide scintillator to fast neutrons is proposed.","PeriodicalId":42569,"journal":{"name":"East European Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2023-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139187530","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

The Mechanism of the Formation of Binary Compounds Between Zn and S Impurity Atoms in Si Crystal Lattice 硅晶格中 Zn 和 S 杂质原子形成二元化合物的机理

IF 0.4

East European Journal of Physics Pub Date : 2023-12-02 DOI: 10.26565/2312-4334-2023-4-20

N. F. Zikrillaev, Maruf K. Khakkulov, Bobir O. Isakov

{"title":"The Mechanism of the Formation of Binary Compounds Between Zn and S Impurity Atoms in Si Crystal Lattice","authors":"N. F. Zikrillaev, Maruf K. Khakkulov, Bobir O. Isakov","doi":"10.26565/2312-4334-2023-4-20","DOIUrl":"https://doi.org/10.26565/2312-4334-2023-4-20","url":null,"abstract":"The paper presents the results of an experimental study of surface morphology, elemental composition, electrophysical and optical properties of Si samples earlier doped with impurity atoms of Zn and S. The results of the study revealed a sufficient concentration of Zn and S elements on Si surface after diffusion (3.1% and 2.6% by weight, respectively). After additional thermal treatment at different temperatures, i.e., at 850°C and 875°C, the samples of I group have regained their initial parameters. However, it’s noteworthy that the mobility of charge carriers in group I samples was comparatively lower than that in group II samples allegedly under the influence of Zn and S binary molecules. After additional heat treatment of all samples at a temperature of 875°C, the authors have studied optical absorption coefficients. And their band gap energies were determined using the Tauc Plot method. According to the results of the study, the optical band gaps in group II and III samples were 1.12 eV, whereas the band gap energy in group I samples after additional thermal treatment at a temperature of 875 °C turned out to be 1.31 eV. Having theoretically calculated the band gap by applying Vegard’s law, the authors suggested that the new structure must be of Si0.92ZnS0.08 - type.","PeriodicalId":42569,"journal":{"name":"East European Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2023-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139187441","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

Surface Electromagnetic TE-Waves Total Internal Reflection 表面电磁 TE 波全内反射

IF 0.4

East European Journal of Physics Pub Date : 2023-12-02 DOI: 10.26565/2312-4334-2023-4-37

V. Galaydych, M. Azarenkov

引用次数: 0

Calculation of the Density of the Distribution of Electronic States in the Conduction Band from the Fundamental Absorption Spectra of Amorphous Semiconductors 从非晶半导体的基本吸收光谱计算导带电子态分布密度

IF 0.4

East European Journal of Physics Pub Date : 2023-12-02 DOI: 10.26565/2312-4334-2023-4-16

Rustamjon G. Ikramov, K. Muminov, M. Nuritdinova, Bobur Q. Sultonov, Oybek T. Kholmirzayev

{"title":"Calculation of the Density of the Distribution of Electronic States in the Conduction Band from the Fundamental Absorption Spectra of Amorphous Semiconductors","authors":"Rustamjon G. Ikramov, K. Muminov, M. Nuritdinova, Bobur Q. Sultonov, Oybek T. Kholmirzayev","doi":"10.26565/2312-4334-2023-4-16","DOIUrl":"https://doi.org/10.26565/2312-4334-2023-4-16","url":null,"abstract":"The region of fundamental absorption in the optical spectra of amorphous semiconductors is theoretically studied using the Davis-Mott approximation according to the Kubo-Greenwood formula. As is known, three types of optical transitions of the electron can be observed in the fundamental absorption region; from the tail of the valence band to the conduction band, from the valence band to the conduction band and from the valence band to the tail of the conduction band. For all these electronic transitions, analytical expressions of the partial absorption spectra are obtained from two different types of the Kubo-Greenwood formula. The width of the optical mobility gap and the proportionality coefficient were determined in the analytical form of the interband absorption spectrum by fitting them to the experimental interband absorption spectrum. A new method is presented for calculating the density of distribution of electronic states in the conduction band of amorphous carbon based on the experimental interband absorption spectrum and the analytical expression of the Kubo-Greenwood formula written for the interband absorption spectrum.","PeriodicalId":42569,"journal":{"name":"East European Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2023-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139187484","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

Lateral Photoelectric Effect In Iron-Silicon Dioxide-Compensated Silicon Hybrid Structures 二氧化硅铁-补偿硅混合结构中的侧向光电效应

IF 0.4

East European Journal of Physics Pub Date : 2023-12-02 DOI: 10.26565/2312-4334-2023-4-17

E. U. Arzikulov, A. D. Nurimov, F.A. Salakhitdinov, U.A. Ashirov, T.S. Sharafova, A.Sh. Khujanov, R.M. Usanov

{"title":"Lateral Photoelectric Effect In Iron-Silicon Dioxide-Compensated Silicon Hybrid Structures","authors":"E. U. Arzikulov, A. D. Nurimov, F.A. Salakhitdinov, U.A. Ashirov, T.S. Sharafova, A.Sh. Khujanov, R.M. Usanov","doi":"10.26565/2312-4334-2023-4-17","DOIUrl":"https://doi.org/10.26565/2312-4334-2023-4-17","url":null,"abstract":"This article presents experimental results on the technology of obtaining and studying the lateral photoelectric effect (LPE) in hybrid structures (HS) of the Fe/SiO2/p-Si and Fe/SiO2/n-Si types. The technology for obtaining such HS consists of two parts: firstly, obtaining compensated (C), highly compensated (HC), and over-compensated (OC) samples of Si . Secondly, obtaining HS Fe/SiO2/p-Si and Fe/SiO2/n-Si. Based on the results, it is shown that sufficiently good HS has been obtained. Experiments on the study of LPE have shown that in the studied HS there is a pronounced manifestation of the lateral photoelectric effect, the magnitude and nature of which strongly depend on the type of conductivity and resistivity of the compensated silicon. The observed features are explained by the fact that in С, HC, and OC silicon samples, impurities that create deep levels in the silicon band gap form various multi-charged complexes that modulate the energy band of silicon, which lead to significant changes in its physicochemical and generation-recombination properties, which underlies the observed effects. Based on the LPE studies, depending on the contact distance, it is possible to determine the numerical values of the diffusion lengths of the minor current carriers (Lp and Ln), their lifetimes (τp and τn), and diffusion coefficients (Dp and Dn) on the substrate material.","PeriodicalId":42569,"journal":{"name":"East European Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2023-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139187578","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

Simulation of Interaction Processes of C20 Fullerene with Graphene 模拟 C20 富勒烯与石墨烯的相互作用过程

IF 0.4

East European Journal of Physics Pub Date : 2023-12-02 DOI: 10.26565/2312-4334-2023-4-28

I. Yadgarov, Farid F. Umarov, Asroriddin S. Kosimov, Khayitmurod I. Jabborov, Shodibek Y. Aminov

{"title":"Simulation of Interaction Processes of C20 Fullerene with Graphene","authors":"I. Yadgarov, Farid F. Umarov, Asroriddin S. Kosimov, Khayitmurod I. Jabborov, Shodibek Y. Aminov","doi":"10.26565/2312-4334-2023-4-28","DOIUrl":"https://doi.org/10.26565/2312-4334-2023-4-28","url":null,"abstract":"Graphene, a carbon sheet one atom thick, with carbon atoms arranged in a two-dimensional honeycomb configuration, has a number of intriguing properties. Fullerenes are a promising material for creating electro-active elements in solar cells and active layers in thin-film organic transistors. A computer model of the C20 fullerene molecule was constructed using the energy minimization method with the second-generation Brenner potential (REBO). A computer model of \"infinite\" defect-free graphene was built, designed to consider the process of adsorption of a C20 fullerene molecule on its surface. To study adsorption process computer models of fullerene and \"infinite\" graphene were approached to the required distance with a different set of geometric arrangement of fullerene with respect to the graphene surface. It has been established that the adsorption of fullerene C20 on the surface of graphene can be carried out in three different ways, differing in the number of interacting fullerene and graphene atoms. The binding energies and adsorption lengths for C20 fullerene molecules adsorbed on the graphene surface in different ways are calculated. The way of adsorption corresponding to the highest binding energy and the shortest adsorption length was revealed.","PeriodicalId":42569,"journal":{"name":"East European Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2023-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139187588","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

Simultaneous Docking of Antiviral Drugs and Cyanine Dyes with Proteins Using Multiple Ligand Approach 利用多配体方法同时对接抗病毒药物和蓝染料与蛋白质

IF 0.4

East European Journal of Physics Pub Date : 2023-12-02 DOI: 10.26565/2312-4334-2023-4-42

O. Zhytniakivska, U. Tarabara, Kateryna Vus, V. Trusova, G. Gorbenko

{"title":"Simultaneous Docking of Antiviral Drugs and Cyanine Dyes with Proteins Using Multiple Ligand Approach","authors":"O. Zhytniakivska, U. Tarabara, Kateryna Vus, V. Trusova, G. Gorbenko","doi":"10.26565/2312-4334-2023-4-42","DOIUrl":"https://doi.org/10.26565/2312-4334-2023-4-42","url":null,"abstract":"The protein-based nanosystems for targeted drug delivery of a wide array of substances, ranging from small drugs and therapeutic proteins to nucleic acids and genes, attract increasing attention due to their biocompatibility and biodegradability, extraordinary binding capacity for different ligands, accessibility from natural sources, effective drug protection and gentle encapsulation conditions. Due to the multitude of binding pockets and functional groups on the protein surface, these nanocarriers seem to be highly efficient multifunctional nanotheranostic systems that could incorporate both a therapeutic drug and a visualizing agent. This integration serves multiple purposes, including the regulation of drug release, monitoring the alterations at the target site in response to treatment, and offering crucial insights into the efficacy of the intervention in its early stages. The development of these advanced nanosystems necessitates a thorough comprehension of the potential interactions within these intricate systems. In the present study we assessed the potential of six trimethine and seven pentamethine cyanine dyes to serve as visualizing agents in the drug-protein-dye systems which include functionally significant proteins (cytochrome c, serum albumin, lysozyme and insulin and four antiviral drugs, viz. favipiravir, molnupiravir, nirmatrelvir and ritonavir. The ternary systems with the highest dye-protein surface shape complementarity were established for all groups of the examined cyanine dyes. The influence of the cyanine dye structure on the stability of the drug-protein-dye complexes was assessed. The obtained results indicate that the dye-protein affinity is not solely dependent on the length of the polymethine chain. It was found that the most prospective drug delivery systems containing the trimethines and pentamethines as visualizing agents are AK5-6-, AK5-8- and AK3-11-drug-albumin complexes.","PeriodicalId":42569,"journal":{"name":"East European Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2023-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139187596","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

Microstructure, Nano-, and Macro-Indentation Characterization of AISI 302 Steel After High-Temperatures Aging 高温老化后 AISI 302 钢的微观结构、纳米和宏观压痕表征

IF 0.4

East European Journal of Physics Pub Date : 2023-12-02 DOI: 10.26565/2312-4334-2023-4-33

O. Ben Lenda, H. El ganich, El Madani Saad

引用次数: 0

Non-Relativistic Calculation of Excited-State Ionization Potentials for Li-Like Ions Using Weakest Bound Electron Potential Model Theory 利用最弱结合电子势模型理论对类锂离子激发态电离势进行非相对论计算

IF 0.4

East European Journal of Physics Pub Date : 2023-12-02 DOI: 10.26565/2312-4334-2023-4-41

Muhammad Rameez Mateen, Roohi Zafar, Ahmed Ali Rajput, Shafiq Ur Rehman, M. M. Zahid

引用次数: 0