Conveners
Parallel Session 4: Nuclear and related analytical techniques in environmental and materials science: (1)
- Manh Dung Ho ()
Parallel Session 4: Nuclear and related analytical techniques in environmental and materials science: (2)
- Marina Frontasyeva (JINR)
Parallel Session 4: Nuclear and related analytical techniques in environmental and materials science: (3)
- Xinxiang Li (University of South China)
Parallel Session 4: Nuclear and related analytical techniques in environmental and materials science: (4)
- Octavian G. Duliu (University of Bucharest, Faculty of Physics, Department of Structure of Matter, Earth and Atmospheric Physics, Astrophysics & Geological Institute of Romania)
Air pollution is the world's most pressing environmental crisis It is responsible for more than 7 million deaths annually, the bulk of which – 70 per cent – occurs in Asia-Pacific region. Air pollution in these countries is several times higher than WHO guideline for safe air. Heavy metals (HM) are among the most dangerous environmental pollutants. In most European countries, the need to study...
Extensive production and application of gold nanoparticles leads to contamination of aquatic and terrestrial ecosystems, creating risks for consumers of plant products. The effects of gold nanoparticles in concentration range of 1-100 mg/L applied in two routes on Mentha spicata L. plants, soil and human health was investigated. k0-neutron activation analysis was used to determine gold...
Instrumental neutron activation analysis was used to determine the content of more than 30 chemical elements in moss, soil and leaves samples collected in seven Moscow parks, Russia. To determine Cd, Pb and Cu atomic absorption spectrometry was applied. In general, in moss samples used to assess air pollution the content of elements increased with exposure time, except alkali element (K, Cs...
Hao Xu1, Jie Feng1,2, Mingyang Zhu1, Bingzhan Shi1, Guoqiang Zhang3, Jinguang Wang4, Yifei Li4, Xin Lu4,5,6, Wenchao Yan1,2, Liming Chen1,2
1State Key Laboratory of Dark Matter Physics, Key Laboratory for Laser Plasmas (MoE), School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China, haoxu001@sjtu.edu.cn.
2 Collaborative Innovation Center of IFSA, Shanghai Jiao...
Neutron spectra and fast neutron fluence rate measurement for the Atomospheric Neutron Irradiation Spectrometer at CSNS
An optimized k₀-neutron activation analysis (k₀-NAA) method, incorporating cyclic irradiations of short-lived radionuclides (SLRNs), was developed at the Dalat Research Reactor (DRR). This study presents the precise characterization of reactor parameters using a fast irradiation facility, rigorous sample preparation, and advanced calibration of HPGe detector-based gamma-ray spectrometry for...
Development status of the neutron detectors for instruments at China Spallation Neutron Source
It is already well known that Fe-Ga alloys possess increased values of the magnetostriction constant. This characteristic has been studied in a wide range of gallium concentration (up to 35 at.%) [1, 2] and the presence of two peak of magnetostriction at 19 and 27 at.% of gallium has been established. At present, work is underway to analyze the influence of certain structural phases on the...
The treated and untreated wastewaters are widely used for irrigation in many developing countries. They often contain not only organic compounds, but also various metals that are both essential (zinc, copper) and potentially hazardous (chromium, nickel) for human health. Since plants, including leafy vegetables, can accumulate metals both in their roots and edible parts, this can be dangerous...
The new direction in medicine that emerged in the second half of the ХХ century –medical elementology – opens fundamental basis for the development and use of new methods of diagnosis and treatment of various diseases, including oncological ones, as well as for solving many other problems facing modern medicine. The subject of research in this new direction consists of four points:
- study of...
A comprehensive analysis of soil elemental content in the Nile Delta, Egypt, was conducted using advanced analytical techniques, including Inductively Coupled Plasma Atomic Emission Spectrometry (ICP–AES) and Inductively Coupled Plasma Mass Spectrometry (ICP–MS). A total of 55 elements were analyzed across 53 soil samples. Of these, 10 major elements (Si, Ti, Al, Fe, Mn, Mg, Ca, Na, K, and P)...
$ICP-MS$ method has been used for analyses [1] of the elemental and isotope composition (64 elements) of bones of dinosaurs, South mammoths, prehistoric bear and archanthropus as well as the samples of surrounding soils; everything collected in different parts of Uzbekistan. A high concentration of uranium we detected in the bones of dinosaurs (122mg/kg), South mammoth (220mg/kg), prehistoric...
The church of Transfiguration of Our Saviour on the Nereditsa Hill is one of the earliest Old Russian buildings, raised in 1198 by order of Knyaz of Novgorod Yaroslav Vladimirovich. The church was included in the UNESCO list of World Heritage sites in 1992. During the World War II, the monument was partially destroyed. As a result, almost the entire painting crumbled, with the exception of a...
To get more data concerning the geochemistry and mineralogy of the Danube River tributaries mainly from the Eastern Serbian sector and to elucidate the status quo of sedimentary material, Instrumental Neutron Activation Analysis (INAA) and X-Ray Diffraction (XRD) were used in tandem to investigate 10 samples of unconsolidated bottom sediments, two samples collected at 1.5 and 7.5 m below the...
This work presents the results of a comprehensive study that applied complementary physico-chemical methods to 29 mural fragments from the Vladychnaya Palata in the Novgorod Kremlin. Plaster samples were subjected to neutron activation analysis (NAA) at the WWR-K research reactor (Institute of Nuclear Physics, Kazakhstan) to determine elemental composition. The pigment composition of the...
Determination of radiosensitivity for plant species is important in order obtain desirable plant characteristics. As a rule, median lethal dose(LD50) is considered as appropriate dose to obtain the highest mutation frequency [1].
Such a task for fast neutrons (FN) is a complex challenge due to the unique properties of neutron radiation, the biological variability of the plant, the difficulty...
Crystallographic texture (or crystallographic preferred orientation) is an inherent property of polycrystalline materials, which defines the anisotropy of their bulk physical properties. Textures are formed during inelastic deformation processes, crystallization, recrystallization, etc. They are also influenced by structural phase transformations, which may be studied in situ. Such experiments...
Abstract
The effect of neutron irradiation on the structural, optical, and electronic properties of doped strained heterostructures with AlGaAs/InGaAs/GaAs and AlGaAs/InGaAs/AlGaAs quantum wells was experimentally studied. Heterostructures with a two-dimensional electron gas of different layer constructions were subjected to neutron irradiation in the reactor channel with the fluence range of...
Physical Design of a High-Brightness Neutron Source Target Station Using 100 MeV Protons on a Tantalum Target
147,149Sm are slow neutron capture (s-process) nuclides in nuclear astrophysics, whose (n,γ) cross-section are the important input parameters in nucleosynthesis net calculation in the Samarium (Sm) region. Additionally, 149Sm is a fission product of 235U with 1% yield, and its neutron resonance parameters play a critical role in reactor neutronics. According to the available nuclear evaluation...
Time-Resolved Prompt Gamma Neutron Activation Analysis (T-PGAA) is an innovative nuclear analytical technique that combines the advantages of Neutron Resonance Capture Analysis (NRCA) and Prompt Gamma Activation Analysis (PGAA). It exhibits high sensitivity and exceptional isotopic resolution capabilities. T-PGAA holds significant potential in diverse fields such as lunar soil analysis,...
In this work the results of modeling and simulating the burnup of the IBR-2M pulsed fast reactor in the Monte Carlo software package. A three-dimensional geometric model of the reactor has been developed, including an active zone with 64 fuel assemblies, a PO-3 reactivity modulator, a control and protection system, and a liquid metal sodium coolant. Critical calculations and simulation of the...
The NEPTUN reactor is a pulsed periodic research reactor under development with a sodium coolant and a core based on neptunium nitride fuel. The reactor is designed for experiments using extracted beams. Average thermal power is 10-15 MW, pulse half-width is 200 μs, pulse frequency is 10 Hz, time-average thermal neutron flux density is ~1014 cm−2·s−1. The reactor vessel and its core are...
The development of a design for a new, high-class reactor, NEPTUNE, is required to effectively continue the neutron research program once the IBR-2M's service life ends and to satisfy new needs. This reactor, like the IBR-2M, will be unique, more powerful, and competitive among other facilities in the world. It will be a tool for physicists, biologists, and creators of new substances and...
Mofan Zhang1,2
1China Spallation Neutron Source
2Indiana University, zhangmo@iu.edu
Parity Violation (PV) effects in p-wave resonances of compound nucleus has always been the interest of the NOPTREX (Neutron Optical Parity and Time-Reversal EXperiment) collaboration since it may shine lights on the search of Time-Reversal Invariant Violation (TRIV) in the same resonances that exhibit a...
The development of polarized neutron technology is pivotal for advancing studies in material science and fundamental physics, particularly in probing magnetic structures and symmetry violations. At the China Spallation Neutron Source (CSNS), significant progress has been made in the design and implementation of polarized 3He neutron spin filters (NSFs) based on spin-exchange optical pumping...
