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Гетерогенный кластер | ЛИТ/ОИЯИ
Updated: 54 min 13 sec ago

Production of light hypernuclei in Au+Au collisions at sNN=3 GeV within a thermodynamic approach

Mon, 04/21/2025 - 16:57
M. Kozhevnikova and Yu. B. Ivanov Simulations of the Λ-hyperon and light-hypernuclei production in Au+Au collisions at √sNN = 3 GeV were performed within the updated three-fluid hydrodynamics-based event simulator extended by UrQMD (ultrarelativistic quantum molecular dynamics) final state interactions (THESEUS). The light (hyper)nuclei are treated thermodynamically, i.e., they are considered …

Examination of STAR fixed-target data on directed flow at sNN=3 and 4.5 GeV

Mon, 04/21/2025 - 16:49
Yu. B. Ivanov and M. Kozhevnikova We present results of simulations of directed flow of various hadrons in Au + Au collisions at collision energies of √sNN = 3 and 4.5 GeV. Simulations are performed within the model three-fluid dynamics and the event simulator based on it (THESEUS). The results are compared …

Examination of STAR fixed-target data on directed flow at sNN=3 and 4.5 GeV

Mon, 04/21/2025 - 16:45
Yu. B. Ivanov and M. Kozhevnikova DOI: 10.1103/PhysRevC.110.014907.

Technical Design Report of the Spin Physics Detector at NICA

Mon, 04/21/2025 - 16:40
The SPD Collaboration: V. Abazov, V. Abramov, L. Afanasyev, R. Akhunzyanov, A. Akindinov, I. Alekseev, A. Aleshko, V. Alexakhin, G. Alexeev, L. Alimov, A. Allakhverdieva, A. Amoroso, V. Andreev, V. Andreev, E. Andronov, Yu. Anikin, S. Anischenko, A. Anisenkov, V. Anosov, E. Antokhin, A. Antonov, S. Antsupov, A. Anufriev, K. Asadova, S. Ashraf, V. Astakhov, A. Aynikeev, M. Azarkin, N. Azorskiy, A. Bagulya, D. Baigarashev, A. Baldin, E. Baldina, N. Barbashina, A. Barnyakov, S. Barsov, A. Bartkevich, V. Baryshevsky, K. Basharina, A. Baskakov, V. Baskov, M. Batista, M. Baturitsky, V. Bautin, T. Bedareva, S. Belokurova, A. Belova, E. Belyaeva, A. …

К теоретической интерпретации данных о взаимодействиях ядер аргона с ядрами при высоких энергиях

Mon, 04/21/2025 - 16:27
В. В. Ужинский, А. С. Галоян, Н. А. Чалый Недавно (2024 г.) коллаборация NA61/SHINE представила экспериментальные данные о рождении π±, K±, протонов и антипротонов в центральных 40Ar +45 Sc взаимодействиях при Plab = 13−150 A · ГэВ/c. Коллаборация сравнила данные с предсказаниями популярных теоретических моделей. Оказалось, что модели неудовлетворительно описывают …

Possible Studies of Two-Particle Transverse Momentum Correlations in Proton–Proton and Deuteron–Deuteron Interactions at NICA Energies

Mon, 04/21/2025 - 16:23
A. Galoyan, A. Ribon & V. Uzhinsky  Two-particle transverse momentum (PT) correlations are investigated for proton–proton and deuteron–deuteron interactions at the center-of-mass energy of NN collisions of 10 GeV. The correlations between Λ—hyperons and anti-Λ—hyperons, K-, π—mesons and protons are calculated using the Geant4 FTF and Pythia 6.4 models. It is shown that PT correlations between Λ—hyperons and …

Tuning the Geant4 FTF Model Using Experimental Data of the NA61/SHINE Collaboration

Mon, 04/21/2025 - 16:20
A. Galoyan, V. Uzhinsky The NA61/SHINE collaboration measured inclusive cross sections of \pi^+ and \pi^- meson production in the interactions of 31 GeV/c protons with carbon nuclei at forward emission angles (0 — 420 mrad). The collaboration also presented predictions of Monte Carlo models — FLUKA, VENUS and UrQMD, in …

Three-dimensional calculations of positron creation in supercritical collisions of heavy nuclei

Mon, 04/21/2025 - 16:11
N. K. Dulaev, D. A. Telnov, V. M. Shabaev, Y. S. Kozhedub, X. Ma, I. A. Maltsev, R. V. Popov , and I. I. Tupitsyn Energy-angle differential and total probabilities of positron creation in slow supercritical collisions of two identical heavy nuclei are calculated beyond the monopole approximation. The time-dependent …

QED calculations of intra-L-shell singly excited states in Be-like ions

Mon, 04/21/2025 - 16:00
A. V. Malyshev, Y. S. Kozhedub, V. M. Shabaev, and I. I. Tupitsyn The ab initio approach is used to evaluate the excitation energies of the 2⁢s⁢2p⁢2S+1⁢PJ states from the ground state as well as the 2⁢s⁢2p⁢3P1→ 2⁢s⁢2p⁢3P0 and 2⁢s⁢2p⁢3P2→2s⁢2p⁢3P1 transition energies for selected Be-like highly charged ions over a wide …

Orbital collapse and dual states of the 5⁢g electrons in superheavy elements

Mon, 04/21/2025 - 15:56
I. I. Tupitsyn, I. M. Savelyev, Y. S. Kozhedub, D. A. Telnov, N. K. Dulaev, A. V. Malyshev, E. A. Prokhorchuk, and V. M. Shabaev The problem of orbital collapse of the 5⁢g and 6⁢f electrons in atoms of superheavy elements (SHEs) is considered. Previously, the presence of the orbital …

Потенциал ионизации и сродство к электрону 119-го элемента: расчеты в оптимизированном гауссовом базисе

Mon, 04/21/2025 - 15:51
Проведена оптимизация базисного набора гауссовых функций для релятивистских расчетов химических свойств сверхтяжелого элемента с зарядом ядра Z=119Z=119. Полученный базис использован для вычисления потенциала ионизации и сродства к электрону 119-го элемента в рамках односсылочного метода связанных кластеров и метода связанных кластеров в пространстве Фока. DOI: 10.61011/OS.2024.10.59411.7283-24.

Релятивистские расчеты потенциальных энергий низколежащих электронных состояний и дипольных моментов переходов радикала OH

Mon, 04/21/2025 - 15:46
Д. П. Усов, Н. К. Дулаев, А. В. Столяров, Ю. С. Кожедуб, И. И. Тупицын, В. М. Шабаев Релятивистский расчет молекулярных свойств низколежащих электронных состояний радикала OH выполнен с использованием различных неэмпирических методов квантовой химии. В результате исследования получены кривые потенциальной энергии для электронных состояний в широком диапазоне межъядерных расстояний, …

Reactivity of Ts and At oxides and oxyhydrides with a gold surface from periodic DFT calculations

Mon, 04/21/2025 - 15:40
Anton Ryzhkov, Valeria Pershina, Miroslav Iliaš and Vladimir Shabaev Adsorption energies, Eads, of oxides and oxyhydrides of the superheavy element (SHEs) Ts and of its lighter homologue At on the gold surface are predicted on the basis of relativistic periodic density functional theory calculations via AMS BAND software. The following compounds were considered: …

Study of the Structure of the ⁹Be Nucleus in the Alpha-Cluster Model by the Method of Hyperspherical Functions

Fri, 04/18/2025 - 16:00
A. S. Bazhin and V. V. Samarin The energy and the squared modulus of the wave function of the ground state of the 9Be nucleus as a system of two alpha-clusters and an outer neutron were calculated using hyperspherical functions. A system of hyperradial equations was solved using cubic splines. The …

Dynamics of Neutron Transfer in the Reaction ³He + ⁹Be

Fri, 04/18/2025 - 15:55
Aidos K. Azhibekov, Englik K. Almanbetova, Mikhail A. Naumenko, Kairat O. Mendibayev, Sergey M. Lukyanov, Talgat G. Issatayev, Bakhytzhan A. Urazbekov, Asset M. Kabyshev, Kuralay Dyussebayeva and Timur K. Zholdybayev The paper presents the results of experiments on measuring cross-sections for the neutron transfer channels 9Be(3He, α)8Begs,3.03 in the reaction of the 3He …

Neutrino spin oscillations near a black hole

Fri, 04/18/2025 - 15:51
Mridupawan Deka, Maxim Dvornikov In this work, we study neutrino spin oscillations in the case when they are gravitationally scattered off a rotating Kerr black hole surrounded by a thick magnetized accretion disk. We consider only toroidal magnetic field inside the disk. Neutrino spin precession is caused by the interaction of …

Spin Oscillations in Neutrino Gravitational Scattering

Fri, 04/18/2025 - 15:49
Mridupawan Deka and Maxim Dvornikov We study neutrino spin oscillations while the particles scatter off a rotating black hole surrounded by a thick magnetized accretion disk. Neutrino spin precession is caused by the interaction of the neutrino magnetic moment with the magnetic field in the disk which has both toroidal …

Skyrmion crystal phase on a magnetic domain wall in chiral magnets

Fri, 04/18/2025 - 15:46
Yuki Amari, Muneto Nitta We study a magnetic domain wall in the ferromagnetic phase in chiral magnets in two dimensions with an in-plane easy-axis anisotropy and an out-of-plane Zeeman magnetic field, and find a chiral soliton lattice (spiral) phase beside a ferromegnetic phase inside the domain line, where the former represents …

Domain-wall skyrmion chain and domain-wall bimerons in chiral magnets

Fri, 04/18/2025 - 15:44
Yuki Amari, Calum Ross, and Muneto Nitta We construct domain-wall skyrmion chains and domain-wall bimerons in chiral magnets with an out-of-plane easy-axis anisotropy and without a Zeeman term coupling to a magnetic field. Domain-wall skyrmions are skyrmions trapped inside a domain wall, and they are present in the ferromagnetic (FM) phase of …

Решёточное исследование свойств КХД во внешних условиях: при конечных температуре и плотности, в присутствии вращения, магнитного поля

Fri, 04/18/2025 - 15:31
Брагута В. В., Коломоец Н. В., Котов А. Ю., Кудров И. Е., Неделько С. Н., Роенко А. А., Сычев Д. А., Герштейн Я. А. a) Уравнение состояния кварк-глюонной плазмы в присутствии внешнего магнитного поля и ненулевого химического потенциала. Исследовано уравнение состояния КХД при ненулевой барионной плотности в присутствии внешнего магнитного поля. Были вычислены первые три коэффициента разложения давления в ряд Тейлора по химическому потенциалу, …