Abstract
Boron nitride quantum dots (BNQDs) are promising for Boron Neutron Capture Therapy (BNCT) due to their unique properties. This work analyzes their electronic structure using DFT and TD-DFT to understand their absorption characteristics. We demonstrate both theoretically and experimentally that solvents used in synthesis do not act merely as a medium but chemically...
Abstract
In This study focuses on the synthesis of activated carbon derived from pistachio shells through chemical activation using potassium hydroxide (KOH). The raw biomass was carbonized and activated at three different temperatures: 600 °C, 700 °C, and 800 °C, to investigate the influence of activation temperature on the structural and electrochemical properties. Characterization...
The development of novel optogenetic tools is critically dependent on engineering microbial opsins with red-shifted absorbance spectra, as red light offers superior tissue penetration and reduced phototoxicity compared to blue-green light [1]. To address the resource-intensive nature of site-directed mutagenesis, a number of in silico tools have been introduced to identify promising candidates...
Thermal and epithermal neutron self-shielding correction factors for the (n,g) reaction in the 186W target were determined by simulation using the PHITS code. The 186W cylindrical target was in the form of metal powder diluted in an aluminum (Al) matrix at various concentrations. A Maxwellian neutron source with an average peak energy at 0.0253 eV was applied to the thermal neutron group and a...
The CMD-3 detector at the VEPP-2000 collider studies physics of light hadrons in the electron-positron collisions. Its electromagnetic endcap calorimeter consists of Bismuth Germanate (BGO) scintillation crystals with readout by silicon PIN photodiodes and custom electronics.
A detailed analysis of the calorimeter's signal response revealed a systematic nonlinearity in its readout...
The classical Debye–Scherrer method, widely used to determine crystallite sizes in polycrystalline materials, has several fundamental limitations associated with the interpretation of diffraction peak broadening. A promising alternative for material structure diagnostics is the method based on the analysis of parametric X-ray radiation (PXR) generated by the interaction of relativistic...
The effects of SHI irradiation on the structural evolution of Ag-implanted and Ag + He co-implanted SiC were investigated in this work. Silver (Ag) ions at 360 keV were implanted at room temperature (RT) to a fluence of 2×10^16 cm^−2. Some of the as-implanted samples were then irradiated at RT with 167 MeV Xe ions to fluences of 1×10^13 cm^−2, 1×10^14 cm^−2 ,3.4×10^14 cm^−2 and...
Although moss is widely used to monitor the air quality due to its special properties. However, collecting moss in large cities with high density of concrete is very difficult. This paper presents the results of the first study to investigate the chemical element absorption capacity of cotton, a readily available material as a substitute for moss. Cotton and Climacium dendroides moss samples...
This study is dedicated to investigating the defects induced by gamma irradiation in zirconium carbide (ZrC) nanocrystals and their impact on the crystal structure using both theoretical and experimental approaches. Gamma irradiation was carried out at doses of 1500 and 3000 kGy, and the resulting changes were comprehensively analyzed using Positron Annihilation Spectroscopy (PAS), Raman...
The angular distributions of Drell-Yan lepton pairs allow to determine precisely the dynamics of vector boson production in quantum chromodynamics. The dependence of the angular coefficients $A_{i}$ on the transverse momentum of $J/\psi$ mesons were obtained under the conditions of the first stage of the SPD experiment using the Pythia generator. The $J/\psi$ mesons produced in pp collisions...
Boron is an element that can be effectively determined using the Prompt Gamma Neutron Activation Analysis (PGNAA) method. we applied the PGNAA method to quantify 10B in automobile glass through the reaction 10B(n,αγ)7Li. Measurements were conducted using an HPGe-BGO Compton suppression spectrometer system at the Dalat Nuclear Reactor. The construction of a linear calibration function for...
Photon-counting detectors (PCDs) are emerging as a cornerstone technology for the development of the next-generation computed tomography. Among this type of detector, the hybrid GaAs:Cr-TIMEPIX3 detector demonstrates great potential due to its combination of high gamma detection efficiency and high readout speed.
In this study, a novel energy calibration method for GaAs:Cr-TIMEPIX3 was...
The Jiangmen Underground Neutrino Observatory (JUNO) is an international neutrino experiment to study fundamental properties of neutrino and natural objects using neutrino as a probe. High-quality data for physics analyses require a reliable system for offline run validation. In this context, a monitoring system is being developed that can be used for JUNO, offering visualizations and tools to...
Membrane proteins (MPs) have a lot of essential functions in cell, therefore, corresponding researches are very important for science and medicine. There are a lot of obstacles in obtaining of MPs’ high-resolution structures by X-Ray diffraction methods. Some of them are connected with the crystallization in lipid cubic phase (in meso); and one of the obstacles is the limitation of water...
The global energy crisis and the need to reduce greenhouse gas emissions have positioned nuclear power as a viable low carbon option. However, concerns remain about the release of radioactive fission products (FPs) and the long term storage of nuclear waste. In advanced reactor design like High Temperature Gas Cooled Reactor, tri structural isotropic (TRISO) fuel particles comprising a uranium...
Nanotechnology has emerged as a transformative tool in the life sciences to offer innovative solutions to overcome the limitations of conventional drug delivery systems, particularly the poor solubility, lipophilicity, and instability of many bioactive compounds. Halogenated natural products (HNPs) are of great interest due to their potent biological activities, including notable antimicrobial...
Prominent physical properties of a broad family of single-molecule magnets based on the transition metal ions with the unfilled electronic 3d-orbital shell are characterized and their potential for practical applications is revealed. In particular, molecular magnets can serve as elements of magnetic memory, quantum bits and molecular refrigerants [1].
To relate the observable characteristic...
Nanopowders were synthesised via the precipitation method, annealed, and incorporated into a polycaprolactone (PCL) matrix through solution casting with acetophenone as solvent to fabricate luminescent nanocomposite films. This study assessed the impact of varying Sm³⁺ concentrations on the films’ structural, morphological, thermal, and luminescent behaviour. XRD confirmed the orthorhombic...
This work provides an in-depth analysis of finite nuclei properties and nuclear matter saturation properties, highlighting the essential role of three-body forces (3BF) in connecting microscopic interactions with macroscopic nuclear phenomena. Energy density functional techniques are used in the extension to finite nuclei using the equation of state (EOS) from Brueckner-Hartree-Fock (BHF)...
During the sessions of the NICA accelerator complex, an important task was to determine the performance of the cryogenic systems equipment in order to measure its operating efficiency. To determine the performance, it is necessary to measure the flow rate of the medium through the units. The paper considers cases of using diaphragms as part of the cryogenic complex equipment.
Successful...
The MONUMENT experiment is aimed at measuring muon capture on daughter nuclei of candidates for double neutrinoless beta decay (0v2β). These measurements will be important for verifying the accuracy of theoretical calculations of nuclear matrix elements.
Currently, there are a number of fundamental problems in physics, one of which is to determine the nature of neutrinos. 0v2b is possible...
This study explores the effect of heat treatment and helium (He) bubbles on the structure of SiC and the migration behaviour of silver (Ag) in SiC. Ag ions were implanted into two polycrystalline SiC substrates (Ag-SiC), and one of the Ag-SiC samples was also co-implanted with He ions (Ag + He-SiC); both implantations were carried out at 350 °C. The samples were then annealed sequentially from...
This work presents a study of three-body quantum systems using the hyperspherical harmonics method combined with a finite-difference numerical method. The primary goal was to master the procedure for deriving, solving, and analyzing the coupled hyperradial Schrödinger equations using model coordinate potentials.
The hyperspherical harmonics method is chosen for its remarkable simplicity and...
Modern life science is inconceivable without radiation studies such as X-ray diffraction or electron microscopy. Radiation research methods have made a particularly significant contribution to structural biology - the study of a variety of biological macromolecules. One important area of structural biology is the study of membrane proteins and their structures.
Membrane proteins (MPs) are...
In this paper we investigated the behavior of magnetic momentum of ferromagnetic in Josephson Junction. With application of external electromagnetic radiation we can observe Chimera Step in current voltage characteristic, and stable behaviour of magnetization on it. But beyond this step we can also observe stable behaviour of magnetization with switching along axis normal to easy axis and...
Nanowires are anisotropic nanoscale objects whose length significantly exceeds their diameter. Nanowires, both in the form of single nanostructures and in the form of ordered arrays, have a wide range of applications: from transparent electrodes and biosensors to lasers and metamaterials. Superconducting segmented nanowires with normal inserts, due to the Josephson effect, can be used in...
The Burabay State National Natural Park is a national park of the great natural and historical values located in the north of Kazakhstan, which has been exposed in recent years to significant anthropogenic impact. The moss biomonitoring was performed in the Borovoye resort community, an important tourist destination in the national park, to identify the level of air pollution. Mosses collected...
The RF2 and RF3 amplifier complexes of the NICA collider are designed based on the modular principle, according to which the total output power is formed by summing the power of individual amplifier modules. One RF2 complex includes four amplifier cassettes, while eight such complexes are installed on two rings of the collider, which in total amounts to 32 modules. The structure of the RF3...
MONUMENT is an international experiment whose results can optimize the theoretical models most suitable for describing matrix elements of neutrinoless double beta decay. This experiment investigates ordinary muon capture in various nuclei. The research focuses on energy and time spectra of gamma radiation.
The objective of this work is to determine the neutron multiplicity from muon...
In this study we transformed the characteristics of silver nanoparticles from non-magnetic to
magnetic by enclosing them in a boron nitride matrix, which seprates the silver nanoparticles
from each other, making their magnetic moment parallel. The chemical method used to
manufacture the silver nanoparticles in boron nitride matrix (Ag NB) was freeze- drying .XRD
data revealed that the...
Membrane proteins (MP) play a significant role in cell physiology, participating in various processes such as signal transmission, ion transport, and others. In this regard, MP is the target of about 60% of currently used drugs. Obtaining atomic structures of MP is of fundamental importance for understanding the relevant molecular mechanisms and developing new therapeutic agents. One of the...
We derive a system of generalized renormalization-group equations for the effective potential of an arbitrary scalar field theory with mass based on the Bogoliubov-Parasiuk theorem on locality of counterterms. These equations sum up the leading logarithmically divergent contributions and represent a system of nonlinear partial differential equations of the second order. We show that in some...
The results of a study on the effect of gamma radiation exposure on the properties of GaN transistors and amplifiers based on them, which can be utilized in the development of electromagnetic calorimeters and other detector systems for experiments in high-energy physics with high radiation load, are presented. The topology of GaN transistors was modeled, their characteristics were compared...
Beam-Beam Counter (BBC) is a part of Spin Physics Detector (SPD) setup at the collider NICA, designed for event plane reconstruction and local polarimetry. BBC consist of scintillation plates – tiles which collect light through a shifter. The light from shifters is registered using SiPM.
To test the uniformity of responses from identical tiles of the BBC SPD detectors, a scintillation...
Spectroscopic factor for the mirror pairs of nuclei.
Bespalova O.V1., Klimochkina A.A.1,2, Talibjanov J.3
Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow, Russia
Dzhelepov Laboratory of Nuclear Problems, Joint Institute for Nuclear,
Moscow State University branch in Dubna
E-mail: klimann16@gmail.com
В данной работе проведено исследование спектроскопических...
The escalating environmental challenges associated with persistent organic pollutants in aquatic systems necessitate the development of innovative purification strategies. Materials that combine adsorption and photocatalysis are particularly attractive, as they enable both the pre-concentration of contaminants on the surface and their subsequent degradation under light irradiation. In this...
In this study, the effects of uniform helium (He) ion implantation and annealing on strontium (Sr) implanted SiC were investigated. 300 keV Sr ions were implanted to a fluence of 2×10^16〖cm〗^(-2) at room temperature (RT). Some of the Sr implanted samples were then uniformly implanted with He ions to a fluence of 1.2×10^17〖cm〗^(-2) at RT. The individual and co-implanted samples were annealed...
The Forward Hadron Calorimeter (FHCal) of the BM@N experiment at JINR, Dubna, is a compensated segmented calorimeter designed to measure heavy-ion collision centrality and reconstruct the reaction plane orientation. Its performance relies on the calorimeter's energy response to projectile spectators, where the deposited energy consists of both electromagnetic (e) and hadronic (h) shower...
During the first stage, SPD experiment will collect and analyze data from colliding polarized and non-polarized beams of protons and deuterons up to $\sqrt{s_{NN}}$ = 10 GeV. Polarization of the Λ-hyperons produced in such events is a subject of much interest as it can provide insight into the polarized parton distribution functions of the original particles. However, some of Λ-hyperons will...
The study of nuclear reactions remains an important tool for investigating the internal structure of atomic nuclei. In particular, cluster models, in which the nucleus is represented as a system of simpler subsystems, allow a deeper understanding of the structure of light nuclei. In this work, an experimental study of the reaction ¹¹B(¹⁰B,¹⁰B)¹¹B at a beam energy of 41.3 MeV was carried out...
