Presentation materials
Automation of a physical experiment is an important part of its preparation. Quite often, it is required to remotely control equipment that is in radiation hazardous conditions, control various parameters of the experimental setup, and monitor the temperature and humidity of the air in the experimental room.
To date, electronics has reached great heights. Microcontrollers costing less than 2...
Rice (Oryza sativa L.) is the main food crop for half of the world's population, which could increase by another 3 billion in the next 30 years [1]. Also, due to the relative simplicity of its genome [2], rice represents a key model for studying the genomics of agroecosystems. Thus, based on fundamental knowledge about the rice genome, it is possible to produce enough food in the future to...
A JINR CSE-1 charge-sensitive preamplifier was developed at VBLHEP JINR to process signals from a semiconductor detector in the spectrometric pathway. The principle of the device calibration is described and the calibration data of the preamplifier in terms of charge sensitivity and noise are presented, a comparative analysis of the device with the charge-sensitive preamplifier CANBERRA Model...
Proton-Boron Capture Therapy (PBCT) is a novel approach of radiation therapy aimed at enhancing proton biological effectiveness to cancer cell killing. PBCT uses a nuclear fusion reaction between low-energy protons and 11B atoms, which produces highly DNA-damaging ฮฑ-particles. As a result of the interaction of low energy proton with 11B nucleus, three alpha particles are generated, which...
The samples were analyzed by means of annihilation line Doppler broadening (DB) spectrometry using variable positron energy at the Dzhelepov Laboratory of Nuclear Problems, JINR in Dubna, Russia. A monoenergetic positron beam 4 mm in diameter was used; the positron energy varied from 0.1 keV to 22 keV. Annihilation ฮณ radiation was recorded by the HPGe detector model GEM25P4-70 (AMETEK ORTEC,...
Nowadays, space exploration is undergoing intensive investigation, and semiconductor electronic equipment in space operates in an environment irradiated by high-energy particles. MeV electrons and protons are present in the near-Earth space environment, where they are more intense, so the study was carried out in these simulated space conditions (energy, vacuum, temperature).
The effects of...
Contrast agents (CA) are a well-established type of chemicals, used to enhance the contrast of tissues or vessels screened with non-invasive medical imaging modalities, such as computed tomography and magnetic resonance imaging, when introduced inside the body. Although many commercially available CAs are made of metal atom and chelate molecule, there is another promising composition of CAs,...
The issue of disposal of zirconium containing waste has not yet been resolved. The safety of storage facilities is defined by the migration ability of radionuclides; one of the main factors is sorption on minerals. This work is devoted to the study of the ability of zirconium to sorption on quartz. Sorption mechanisms and its quantitative characteristics have been investigated by experimental...
Radiation therapy is an effective approach for cancer treatment. Electron beam therapy is prescribed for the superficial neoplasms irradiation [1]. In radiation therapy, special devices called boluses are used to create a complex depth distribution of the absorbed dose. These devices, which follow the contours of the patient body, are located on the surface of the skin in the treatment field....
A dilution cryostat and a hydrogen gas cell for a novel method of precision measurement of the polarization of a high-power electron beam with almost 100% polarization are discussed. An ultracold magnetic trap for polarized atomic hydrogen gas in a strong magnetic field is used as a target for electron beam polarimetry based on Mรธller scattering. JINR is performs calculations, design work and...
Energy storage technology based on lithium-ion electrochemical systems makes it possible to manufacture batteries with high specific energy and power densities. Over the past decades, such batteries have been the most widely used ones in applications related to electric vehicles, portable electronics, and robotics. Lithium-ion battery specific parameters can be significantly improved by...
Neutron reflectors are widely used to store, extract, focus and deliver neutrons to experimental facilities. For the last almost 20 years, Detonation NanoDiamond (DND) powders have been actively studied as a material for efficient diffuse reflectors of Very Cold Neutrons (VCN) with the velocities of 40-150 m/s. Moreover, the DND powder reflects cold neutrons (up to 1000 m/s) quasi-specularly...
The dynamics of recovery of the open porous structure in HDPE films, which are preliminarily uniaxially deformed in the medium of supercritical CO2 followed by shrinkage in the longitudinal direction, upon their repeated stretching in air is studied by structural mechanical methods. The process of shrinkage is accompanied by the approach of lamellas and the disappearance of the oriented...
