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Investigation of the Cross-Sections for the Production of Bromine Isotopes Using Proton-Induced Reactions 利用质子诱导反应生产溴同位素的截面研究
IF 0.5
Ukrainian Journal of Physics Pub Date : 2023-01-23 DOI: 10.15407/ujpe67.11.811
H. A. Mezher, Kadhim Al‐Attafi, B. Alkotbe, Wisam N. Hussein
{"title":"Investigation of the Cross-Sections for the Production of Bromine Isotopes Using Proton-Induced Reactions","authors":"H. A. Mezher, Kadhim Al‐Attafi, B. Alkotbe, Wisam N. Hussein","doi":"10.15407/ujpe67.11.811","DOIUrl":"https://doi.org/10.15407/ujpe67.11.811","url":null,"abstract":"We have considered the production of bromine isotopes by studying the cross-sections of nuclear reactions in the selenium enriched target. This is of importance due to the applications in nuclear medicine and radiation therapy. Eight channels are observed in the production of bromine isotopes: 7634Se(p, 2n) 7535Br, 7734Se(p, 3n) 7535Br, 7634Se(p, n) 7635Br, 7734Se(p, 2n) 7635Br, 7734Se(p, n) 7735Br, 7834Se(p, 2n) 7735Br, 8034Se(p, 4n) 7735Br, and 8034Se(p, n) 8035mBr. The energy of the interacting protons ranging from the threshold is 2.20–84.20 MeV and is calculated by using an activation technique. For the proton-induced production of bromine isotopes from selenium target atoms, the stopping power and the yield have been calculated. The Zeigler formula was applied to investigate the cross-sections and to determine the yield for each reaction over the stopping power range. The total energy of each reaction and the corresponding crosssections are statistically analyzed. These energies are reproduced by the incident proton energy with acceptable errors at 0.01 MeV intervals. One of the most significant results of the current calculations is the stopping power of targets evaluated within the Ziegler and SRIM approaches.","PeriodicalId":23400,"journal":{"name":"Ukrainian Journal of Physics","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41961171","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
Elastic scatering cross-sections obtained on the basis of the potential of the modified Thomas-Fermi method and taking the core into account 基于改进的Thomas-Fermi方法的势并考虑核的弹性散射截面
IF 0.5
Ukrainian Journal of Physics Pub Date : 2023-01-11 DOI: 10.15407/ujpe67.9.645
V. A. Nesterov, O. I. Davydovska, V. Denisov
{"title":"Elastic scatering cross-sections obtained on the basis of the potential of the modified Thomas-Fermi method and taking the core into account","authors":"V. A. Nesterov, O. I. Davydovska, V. Denisov","doi":"10.15407/ujpe67.9.645","DOIUrl":"https://doi.org/10.15407/ujpe67.9.645","url":null,"abstract":"Nucleon density distributions and nucleus-nucleus interaction potentials for the reactions $^{16}$O+$^{40}$Ca, $^{16}$O+$^{56}$Fe and $^{16}$O+$^{90}$Zr have been calculated in the framework of the modified Thomas-Fermi method and considering all terms up to the second order in $hbar$ in the quasi-classical expansion of the kinetic energy. Skyrme forces dependent on the nucleon density are used as the nucleon-nucleon interaction. A parametrization of the nucleus-nucleus interaction potential, which well describes the potential value calculated within the modified Thomas-Fermi approach with density-dependent Skyrme forces, is found. On the basis of the obtained potentials, the cross-sections of elastic scattering are calculated in a good agreement with experimental data.","PeriodicalId":23400,"journal":{"name":"Ukrainian Journal of Physics","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67068660","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
Визначення вмісту 59Ni та 55Fe в конструкційних елементах АЕС
IF 0.5
Ukrainian Journal of Physics Pub Date : 2023-01-04 DOI: 10.15407/ujpe67.10.707
V.O. Zheltonozhsky, D.E. Myznikov, A.M. Savrasov, V. I. Slisenko
{"title":"Визначення вмісту 59Ni та 55Fe в конструкційних елементах АЕС","authors":"V.O. Zheltonozhsky, D.E. Myznikov, A.M. Savrasov, V. I. Slisenko","doi":"10.15407/ujpe67.10.707","DOIUrl":"https://doi.org/10.15407/ujpe67.10.707","url":null,"abstract":"Проведено опромiнювання конструкцiйних матерiалiв 2-го блока ЧАЕС гальмiвними y-квантами з граничною енергiєю 37 МеВ. З вимiряних y-спектрiв, використовуючи спiввiдношення виходiв 57Co, 58Сo та 54Mn, ми визначили вiдношення концентрацiй iзотопiв 58Ni та 56Fe до концентрацiї 59Co. Iз використанням отриманих даних та вимiряної активностi 60Co в дослiджуваних зразках розроблено метод визначення активностей 59Ni та 55Fe. Проведено радiохiмiчну валiдацiю створеного методу i отримано гарне кiлькiсне узгодження активностей 59Ni та 55Fe, знайдених спектроскопiчним та радiохiмiчним методами.","PeriodicalId":23400,"journal":{"name":"Ukrainian Journal of Physics","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43188473","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-Principles Investigation of Concentration Effects on the Electronic and Vibrational Properties of a Boron Aluminum Phosphide Alloy with Wurtzoid Nanostructure 浓度对Wurtzoid纳米结构磷硼铝合金电子和振动性能影响的第一性原理研究
IF 0.5
Ukrainian Journal of Physics Pub Date : 2023-01-04 DOI: 10.15407/ujpe67.10.750
H. A. Fayyadh
{"title":"First-Principles Investigation of Concentration Effects on the Electronic and Vibrational Properties of a Boron Aluminum Phosphide Alloy with Wurtzoid Nanostructure","authors":"H. A. Fayyadh","doi":"10.15407/ujpe67.10.750","DOIUrl":"https://doi.org/10.15407/ujpe67.10.750","url":null,"abstract":"The vibrational and electronic properties of the binary wurtzoids Al7P7 and B7P7 and the ternary one BxAl7-xP7 have been investigated by the use of the approximation of the Density Functional Theory (DFT). By varying the concentration x, we carried out the calculations and various simulations of the bond lengths, energy gap, density of states, force constants, reduced masses, and infrared and Raman spectra. The geometric nanostructure of BxAl7-xP7 wurtzoid has been analyzed using the Gauss view 05 program. As the concentration of B increases, the energy gap widens, indicating that the estimations are consistent with the experimental longitudinal optical measurements. We utilize the theoretical ab initio technique to mimic the properties and nanostructures of BxAl7-xP7 wurtzoid using DFT B3LYP with the 6-311-G** basis sets and the GGA calculations with all electrons.","PeriodicalId":23400,"journal":{"name":"Ukrainian Journal of Physics","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45707301","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
Theoretical Investigation of the Superconducting and Thermodynamic Properties of Two-Band Model High-Temperature Iron-Based Superconductor Ba1–xNaxFe2As2 双能带模型高温铁基超导体Ba1–xNaxFe2As2超导和热力学性质的理论研究
IF 0.5
Ukrainian Journal of Physics Pub Date : 2023-01-04 DOI: 10.15407/ujpe67.10.722
T. Lissanu, G. Kahsay, T. Negussie
{"title":"Theoretical Investigation of the Superconducting and Thermodynamic Properties of Two-Band Model High-Temperature Iron-Based Superconductor Ba1–xNaxFe2As2","authors":"T. Lissanu, G. Kahsay, T. Negussie","doi":"10.15407/ujpe67.10.722","DOIUrl":"https://doi.org/10.15407/ujpe67.10.722","url":null,"abstract":"This work presents the theoretical investigation of the superconducting and thermodynamic properties of the two-band model high-temperature iron-based superconductor Ba1-xNaxFe2As2. By developing a model Hamiltonian and by employing the well-knownvdouble-time temperature-dependent Green’s function formalism, we have computed the superconducting orderbparameters for the electron and hole intra- and inter-band transitions, superconducting transition temperature, densitiesbof states, and condensation energies. Furthermore, the electronic specific heat and the entropy for electron and hole intra-band transitions have been determined. By using appropriate experimental data and some credible approximations of the parameters in the computed expressions, we have found the phase diagrams of superconducting order parameters versus the temperature, superconducting critical temperature versus the inter-band interaction potential, temperature dependences of the electronic specific heat and entropy for electron and hole intra-band transitions, and densities of states for the electron and hole intra-band transitions as functions of the excitation energy at different values of the temperature. Finally, the phase diagrams of the condensation energy versus the temperature, inter-band pairing potential at T = 0 K versus the condensation energy, and condensation energy versus the superconducting transition temperature (TC) have been drawn. In some of the phase diagrams, the comparison between theoretical and experimental values has been made. The results are in a good agreement with previous findings.","PeriodicalId":23400,"journal":{"name":"Ukrainian Journal of Physics","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49616748","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
Feynman’s Classification of Natural Phenomena and Phy-sical Aspects of 2014 Nobel Prize in Physiology or Medicine 费曼对自然现象和物理方面的分类获得2014年诺贝尔生理学或医学奖
IF 0.5
Ukrainian Journal of Physics Pub Date : 2023-01-04 DOI: 10.15407/ujpe67.10.736
A. Chalyi, K. Chalyy, E. V. Zaitseva, A. Kryshtopa
{"title":"Feynman’s Classification of Natural Phenomena and Phy-sical Aspects of 2014 Nobel Prize in Physiology or Medicine","authors":"A. Chalyi, K. Chalyy, E. V. Zaitseva, A. Kryshtopa","doi":"10.15407/ujpe67.10.736","DOIUrl":"https://doi.org/10.15407/ujpe67.10.736","url":null,"abstract":"This review article is devoted to the formulation of the Richard Feynman’s classification of three stages in the study of natural phenomena and the application of this classification to the amazing discovery of the hexagonal grid cells that constitute a positioning system in the brain which was awarded the 2014 Nobel Prize in Physiology and Medicine. The problem of grid cells in brain is considered with accounting for (a) the experimental studies that led to the emergence of hexagons in the human and animal brains, (b) discussion of the problem of generation and propagation of an action potential along nerve fibers, (c) physical parameters of the human brain and its medical applications in the method of hyperthermia for the treatment of malignant tumors, (d) theoretical considerations using a certain analogy between grid cells in brain and the Abrikosov vortex lattice in type II superconductors, and (e) hexagonal graphene and dimensional crossover.","PeriodicalId":23400,"journal":{"name":"Ukrainian Journal of Physics","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49077755","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
Fabrication and Evaluation of Optical Characteristics of (PVA-MnO2–ZrO2) Nanocomposites for Nanodevices in Optics and Photonics 用于光学和光子学纳米器件的（PVA-MnO2–ZrO2）纳米复合材料的制备和光学特性评价
IF 0.5
Ukrainian Journal of Physics Pub Date : 2023-01-04 DOI: 10.15407/ujpe67.10.757
M. H. Dwech, M. Habeeb, A. H. Mohammed
{"title":"Fabrication and Evaluation of Optical Characteristics of (PVA-MnO2–ZrO2) Nanocomposites for Nanodevices in Optics and Photonics","authors":"M. H. Dwech, M. Habeeb, A. H. Mohammed","doi":"10.15407/ujpe67.10.757","DOIUrl":"https://doi.org/10.15407/ujpe67.10.757","url":null,"abstract":"We study the impact of (MnO2–ZrO2) nanoparticles on optical properties of (PVA) polymer. Several samples were produced with different weight ratios of (MnO2–ZrO2) nanoparticles. To prepare the selected samples, the casting method is used. To record the absorption spectrum, wavelengths of 200–1100 nm are applied. We have determined the absorption coefficient, energy gap for indirect transitions (forbidden and allowed), optical constants (such as the dielectric constant with its imaginary and real parts, refractive index, and attenuation coefficient), and optical conductivity. The results indicate that there is a proportional relationship between the optical constants and the concentration of (MnO2–ZrO2) nanoparticles, which means that an increase of the concentration of (MnO2–ZrO2) nanoparticles leads to an increase of the optical constants, while the transmission decreases. Additionally, the optical energy gap decreases from 4.83 eV to 3.4 eV and from 4.65 eV to 3.28 eV with increasing the concentration of (MnO2–ZrO2) nanoparticles for allowed and forbidden indirect transitions, respectively. These results can be considered as key ones for the use of (PVA-MnO2–ZrO2) nanocomposites in various fields such as optoelectronics and photonics.","PeriodicalId":23400,"journal":{"name":"Ukrainian Journal of Physics","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41838739","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: 14
Електрокапілярні властивості гідрогелів 氢气电气特性
IF 0.5
Ukrainian Journal of Physics Pub Date : 2022-12-21 DOI: 10.15407/ujpe67.9.658
Yu. F. Zabashta, V. Kovalchuk, O. Svechnikova, L. Bulavin
{"title":"Електрокапілярні властивості гідрогелів","authors":"Yu. F. Zabashta, V. Kovalchuk, O. Svechnikova, L. Bulavin","doi":"10.15407/ujpe67.9.658","DOIUrl":"https://doi.org/10.15407/ujpe67.9.658","url":null,"abstract":"На пiдставi термодинамiчної теорiї електрокапiлярностi одержано формулу, що зв’язує коефiцiєнт поверхневого натягу гiдрогелю та поверхневу концентрацiю iонних домiшок у полiмерi. Експериментально визначено вiдноснi коефiцiєнти поверхневого натягу гiдрогелю, створеного на основi гiдроксипропiлцелюлози з домiшками iонiв лужних металiв I-ї групи (хлориди Li, Na, K, Rb i Cs). За допомогою отриманої формули обчисленi вiдноснi поверхневi концентрацiї iонiв у вiдповiдних зразках. Показано, що коефiцiєнт поверхневого натягу i поверхнева концентрацiя iонiв залежать вiд розмiру iонiв, i що цi залежностi мають немонотонний характер. Запропоновано механiзм, який вiповiдальний за вказану немонотоннiсть.","PeriodicalId":23400,"journal":{"name":"Ukrainian Journal of Physics","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44640557","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
Електронна будова і стабільність фаз дигідриду магнію 电子结构与镁氢相稳定性
IF 0.5
Ukrainian Journal of Physics Pub Date : 2022-12-21 DOI: 10.15407/ujpe67.9.663
V. N. Uvarov, N. V. Uvarov, M. P. Melnik, M.V. Nemoshkalenko
{"title":"Електронна будова і стабільність фаз дигідриду магнію","authors":"V. N. Uvarov, N. V. Uvarov, M. P. Melnik, M.V. Nemoshkalenko","doi":"10.15407/ujpe67.9.663","DOIUrl":"https://doi.org/10.15407/ujpe67.9.663","url":null,"abstract":"За допомогою зонних розрахункiв в моделi FLAPW (the full-potential linearized augmented-plane-wave) отримано iнформацiю про енергетичнi характеристики, зарядовi стани атомiв, характер хiмiчних зв’язкiв, структуру валентних смуг i смуг провiдностi полiморфних модифiкацiй дигiдриду магнiю. Виявлено, що всi фази дигiдриду магнiю є немагнiтними iзоляторами, а електроннi стани атомiв металу та водню виявились гiбридизованими на всьому протязi як їхнiх валентних смуг, так i смуг провiдностi. Показано, що зниження сукупного заряду електронiв у мiжатомнiй областi приводить до зменшення когезiйних енергiй фаз високого тиску дигiдриду магнiю – чинникiв, якi сприяють полiпшенню кiнетики десорбцiї водню.","PeriodicalId":23400,"journal":{"name":"Ukrainian Journal of Physics","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44723059","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
Ferrimagnetic Characteristics and Spin Compensation Temperatures of a Mixed Spin-3 and Spin-5/2 Blume–Capel Model 混合自旋-3和自旋-5/2 blme - capel模型的铁磁特性和自旋补偿温度
IF 0.5
Ukrainian Journal of Physics Pub Date : 2022-12-21 DOI: 10.15407/ujpe67.9.695
I. A. Obaid, H. Mohamad, Shakir D. Al-Saeedi
{"title":"Ferrimagnetic Characteristics and Spin Compensation Temperatures of a Mixed Spin-3 and Spin-5/2 Blume–Capel Model","authors":"I. A. Obaid, H. Mohamad, Shakir D. Al-Saeedi","doi":"10.15407/ujpe67.9.695","DOIUrl":"https://doi.org/10.15407/ujpe67.9.695","url":null,"abstract":"We study the molecular mean-field theory (MMFT) based on the Gibbs–Bogolyubov free energy function of a ferrimagnetic with mixed spin-3 and spin-5/2 for various magnetic crystal fields in the Blume–Capel model. We have evaluated the free energy depending on the trial Hamiltonian operator. By minimizing the free energy of the present system, we have obtained the characteristic features of the longitudinal magnetizations, compensation temperatures, and re-entrant behaviors in the ranges of low temperatures. In particular, we study the effect of magnetic anisotropies on the critical phenomena for the proposed model. The sublattice magnetization dependence of the free energy function has been discussed as well. Our results predict the existence of multiple spin compensation points in the disordered Blume–Capel system for a square lattice.","PeriodicalId":23400,"journal":{"name":"Ukrainian Journal of Physics","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48440008","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
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