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(1+1)-өлшемдi локалды емес бейсызықты Шредингер теңдеуiнiң нақты шешiмдерi
(ЕНУ им. Л.Н. Гумилева, 2018)Бұл мақалада бiз (1+1)-өлшемдi локалды емес бейсызықты Шредингер теңдеуiн қарастырамыз. (1+1)-өлшемдi локалды емес бейсызықты Шредингер теңдеуi керi шашырау әдiсi арқылы интегралданатыды. Осы теңдеуге Дарбу түрлендiруi пайдаланылған. Сондай-ақ, осы (1+1)-өлшемдi локалды емес бейсызықты Шредингер теңдеуiнiң бiрреттiк, екiреттiк және n -реттiк Дарбу түрлендiрулерi детерминанттық ...2023-08-14 -
16O+ 12O ядрoлық жүйe үшiн 20, 24 МэВ энeргиялaрындaғы сeрпiмдi шaшырaудың oптикaлық пoтeнциaлының пaрaмeтрлeрiн aнықтaу
(ЕНУ им. Л.Н. Гумилева, 2020)16 O иoнының жeңiл ядрoлaрмeн өзaрa әрeкeттeсу пoтeнциaлының энeргeтикaлық тәуeлдiлiгiнe зeрттeу жүргiзiлдi. Төмeнгi энeргиядa 16 O+ 12 С ядрoлық жүйe үшiн aлынғaн өзaрa әрeкeттeсудiң диффeрeнциaлдық қимaсының экспeримeнттiк мәлiмeттeрiнe тeoриялық тұрғыдaн тaлдaу жaсaлды. Fresco бaғдaрлaмасындa 16 O+ 12 С реакциясының серпiмдi шашырауы үшiн (Input file) кiрiс файлдың есептеу ...2023-08-15 -
2017 жылдың 4-10 қыркүйек аралығында CARPET құрылғысында тiркелген ғарыштық сәулелердiң вариациясы
(ЕНУ им. Л.Н. Гумилева, 2020)протон оқиғаларының сәулелену параметрлерi және галактикалық ғарыш сәулелерiнiң қарқындылығы туралы деректер жер маңындағы кеңiстiктегi радиациялық жағдайдың ұйытқысын бағалау үшiн практикалық қызығушылық тудырады. Сондықтан бұл жұмыста жер деңгейiндегi ғарыштық сәулелер ағынын үздiксiз бақылауға арналған CARPET ғарыштық сәулелер детекторының қысқаша сипаттамалары келтiрiлiп, ...2023-08-15 -
Ab-initio вычисления заряженных дефектов в ZnO с использованием программы CRYSTAL
(ЕНУ им. Л.Н. Гумилева, 2018)В работе проведены ab-initio расчеты в приближении ЛКАО с использованием программы CRYSTAL14 для заряженных дефектов в оксиде цинка. Показано, что при высокой концентрации дефектов (близком расположении дефектов) наблюдается недооценка энергии образования в связи со значительной делокализацией заряда в ячейке кристалла. Включение коррекции смещения и дефект-дефектного ...2023-08-14 -
Ab-initio расчеты электронных свойств чистого и легированного кобальтом MgF2
(ЕНУ им. Л.Н. Гумилева, 2019)В развитии твердотельных лазерных систем высокую роль играет глубокое понимание спектральных характеристик материалов. В нашей работе проведено квантово-химическое моделирование электронных и оптических свойств кристалла MgF 2 , легированного кобальтом (Co) для лазерных приложений в программе Crystal. В результате вычислений показано, что атом кобальта в MgF 2 находится в ...2023-08-14 -
BiCuSeO оксиселенид - жаңа келешегi жоғары термоэлектрлiк материал ретiнде
(ЕНУ им. Л.Н. Гумилева, 2019)Жоғары сапалы жаңа термоэлектрикалық материалдарды жылдам табу үшiн Гейслер қорытпаларының теориялық зерттеулерi жүргiзiледi, сонымен қоса болжамды оксид материалдарын модельдеу жүргiзiледi. Металл оксидiнiң термоэлектрлiк материалдарының артықшылығы төмен бағасында және олардың синтез әдiсiнiң салыстырмалы қарапайымдылығы болып келедi. Сонымен қоса металлоксидтi термоэлектриктер ...2023-08-15 -
Bosonic string-scalar model
(L.N.Gumilyov Eurasian National University, 2018)There are three equivalent forms of action for a string in the bosonic string theory: a first-order form (Hamiltonian formalism), a second-order form (Polyakov action), and a nonlinear form (Nambu-Goto action). All three forms of action have reparametrization symmetry, which generates the Virasoro algebra. Polyakov action resembles the action of scalar fields interacting ...2023-08-14 -
Calculation of radiation burden of personnel and public, working and living in area of the uranium mining and uranium-processing enterprises
(L.N.Gumilyov Eurasian National University, 2019)The ionizing radiation throughout all time acted as the main external factor in evolutionary process. Today in many regions owing to radioactive pollution the general background appeared under the influence of technogenic sources of the ionizing radiation. Not only workers of the uranium industry, as well as the public of regions living near places of production and processing ...2023-08-14 -
Comparative analysis of the radiation situation in the Stepnogorsk district in the Akmola region
(L.N.Gumilyov Eurasian National University, 2022)The territory of the Akmola region is characterized by the presence of a number of radiation factors caused by natural and man-made manifestations of increased radioactivity, the main of which are numerous areas of anomalous increases in natural radioactivity, uranium deposits and ore occurrences, as well as long-term large-scale activities of uranium mines and enterprises ...2023-08-16 -
Comparison of standards and methodology of determining the coverage area of the digital terrestrial broadcasting network DVB-T and DVB-T2
(L.N.Gumilyov Eurasian National University, 2018)The DVB-T system is the most widespread in the world and represents the latest modulation and coding technologies, which provides the transmission of audio and video services to subscribers. The DVB-T2 system, like DVB-T, uses the OFDM digital modulation scheme for signal stability and offers several modes to make it as flexible as possible. The DVB-T standard uses OFDM ...2023-08-14 -
Cosmological model with fermion and tachyon fields
(L.N.Gumilyov Eurasian National University, 2019)This article discusses a cosmological model with a fermion and tachyon field in four dimensions together with the homogeneous, isotropic and flat Friedmann-Robertson-Walker Universe. A system of equations of motion has been found for this model. Describe a power solution for the scale factor. Studied the energy conditions. The parameters that have been obtained satisfy the latest ...2023-08-15 -
Cинтез и исследование катализаторов на основе халькогенида кобальта для топливных элементов
(ЕНУ им. Л.Н. Гумилева, 2019)В работе представлены результаты синтеза исходных кластерных соединений на основе халькогенидов кобальта и проведена их термодеструкция на углеродном носителе - саже VulcanXC-72, а также исследованы структурные и физико-химические характеристики приготовленных каталитических систем. Установлен оптимальный режим работы водородовоздушных топливных элементов (ТЭ), а также выявлено, ...2023-08-14 -
Dispersionless limit of the Konno-Oono equation
(L.N.Gumilyov Eurasian National University, 2019)The study of integrable systems or solvable nonlinear differential equations (NDE) has been an active area of research since the discovery of the inverse scattering method. These equations are in a sense universal because they are found in many areas of physics and mathematics. By integrable systems, we mean those that have an infinite hierarchy of symmetries and conservation laws. ...2023-08-15 -
Effect of Xenon Ion Irradiation on the Raman Spectra of BaFBr Crystals
(L.N.Gumilyov Eurasian National University, 2022)Luminescent properties of barium fluorobromide crystals irradiated with xenon ions with energy E=229 MeV up to fluences (1 × 10 10 - 1 × 10 12 ) ion/cm 2 are investigated in this work. The photoluminescence spectra show the presence of an uncontrolled impurity, which is involved in the mechanisms of defect formation. Raman spectra from the surface of BaFBr single crystals were ...2023-08-15 -
Effect of Xenon Ion Irradiation on the Raman Spectra of BaFBr Crystals
(L.N.Gumilyov Eurasian National University, 2022)Luminescent properties of barium fluorobromide crystals irradiated with xenon ions with energy E=229 MeV up to fluences (1 × 10 10 - 1 × 10 12 ) ion/cm 2 are investigated in this work. The photoluminescence spectra show the presence of an uncontrolled impurity, which is involved in the mechanisms of defect formation. Raman spectra from the surface of BaFBr single crystals were ...2023-08-15 -
Exact solutions of the nonlocal complex modified Korteweg-de Vries system of equations
(L.N.Gumilyov Eurasian National University, 2018)To describe some physical process further, it becomes more and more important to find exact solutions and interactions among solutions of nonlinear wave solutions. In this paper, we study the two-dimensional nonlocal complex modified Korteweg-de Vries system of equations obtained from Ablowitz–Kaup-Newell-Segur scheme by Ablowitz-Musslimani type nonlocal reductions. This system ...2023-08-14 -
Exponential solution of the f(R) gravity with Maxwell term and g -essence
(L.N.Gumilyov Eurasian National University, 2018)In this paper, we consider the f(R) model of gravity with a Maxwell term FµνF µν and g -essence in four dimensions together with a homogeneous, isotropic and flat FriedmanRobertson-Walker universe. As a particular case, g -essence includes two important models such as k -essence and f -essence. For this model, a system of equations of motion is found, an exponential solution ...2023-08-14 -
Feynman diagrams as a completely integrable lattice statistical system
(L.N.Gumilyov Eurasian National University, 2019)We consider the application of the Yang-Baxter equation in multiloop calculations in quantum field theory. An important (from the point of view of the physical applications) problem in the analytical evaluations of massless multi-loop Feynman integrals is the representation of the D-dimensional integral. The analytical evaluations of the multi-loop Feynman integrals are ...2023-08-14 -
Hierarchy of WDVV associativity equations for n = 3 case and N = 2 when V0 /= 0
(L.N.Gumilyov Eurasian National University, 2018)We investigate solutions of Witten-Dijkgraaf-E.Verlinde-H.Verlinde (WDVV) equations. The article discusses nonlinear equations of the third order for a function f = f(x, t)) of two independent variables x, t . The solution of some cases of hierarchy equations of associativity illustrated. Lax pairs for the system of three equations, that contains the equation of associativity are ...2023-08-14 -
Hierarchy of WDVV associativity equations for n = 3 case and N = 2 when V0 = 0
(L.N.Gumilyov Eurasian National University, 2019)We investigate solutions to a hierarchy for N = 2 case when V0 = 0 of WittenDijkgraaf-E.Verlinde-H.Verlinde (WDVV) equations. We give a description of nonlinear partial differential equations of associativity in 2D topological field theories (for some special type solutions of the Witten-Dijkgraaf-E.Verlinde-H.Verlinde (WDVV) system) as integrable nondiagonalizable weakly ...2023-08-15
