The simplest photonuclear reaction (γ,n) usually takes place through the well-known mechanism of giant dipole resonance. For a large number of stable nuclei, the energy differential cross-section of this reaction has been successfully measured. The experimental evidence for the (γ,2n) reaction is much poorer, while for reactions where three or more neutrons are emitted (usually denoted by...
Positron Annihilation Lifetime Spectroscopy (PALS) technique enables atomic-scale investigation of a wide range of phenomena and material characteristics. It is based on measuring the time interval between positron production and annihilation and reflects the characteristics of the environment in which the annihilation takes place. The timing resolution of the PALS spectrometer is...
One of the methods for determining the nature of the neutrino mass is the search for neutrinoless double beta decay. Tellurium is one of the promising isotopes undergoing this decay and liquid scintillator detectors are among the most competitive instruments. Herein the results of the research and development of a new tellurium containing liquid scintillators (Te-LS) based on linear...
The CBM experiment for the study of strongly interacting nuclear matter is currently under construction at the FAIR accelerator complex. As a demonstration experiment to check the performance of all detector systems of the CBM experiment, the mCBM experiment was launched within the framework of the FAIR Phase-0 program. One of the modules of the PSD hadron calorimeter (mPSD), equipped with the...
The spontaneous fission is a complicated process that still could not be described by sufficiently reliable theory because of varying of possible final configurations of the system. There are a several theoretical models of the process (for example, semi-empirical [1] or fully-theoretical [2]) but none of them can describe well all known nucleus that could decay by spontaneous fission....
Our work concentrates on studying the Compton scattering kinematics of annihilation photons in different polarization states. Pairs of entangled annihilation photons with mutually orthogonal polarization are produced in positron-electron annihilation in a radioactive source. The Compton scattering of such photons is accurately theoretically and experimentally studied. In contrast, the...
The mass is a fundamental property of an atom comprising all information on its constituents and their interactions. Thus, it carries information on the internal structure of the nucleus, reveal the quantum mechanical shell structure within complex nuclei and determine the energy available for nuclear transformations in radioactive decay processes. Mass measurements allow us to benchmark...
104Rh nuclei was studied using the (nth,2γ) reaction. Measurements with two HPGe detectors for the 104Rh nuclei was conducted at the PGAA facility of the Centre for Energy Research (MTA EK), Budapest, Hungary. The obtained data is based on the analysis of the two-step gamma cascades in the mentioned compound nucleus to the final and some of the lower lying excited levels. The obtained primary...
The aim of this work is to study the cross-section of the inelastic interactions of nuclei with tungsten based on the data of PAMELA space experiment [1]. This instrument is a magnetic spectrometer designed to study fluxes of charged particles in cosmic rays, which was launched into the near-Earth orbit aboard the Resurs-DK1 satellite; data collection continued from 2006 to 2016. PAMELA...
The report presents the advantages and disadvantages of using the Timepix family detectors as a registration system for SPECT and CT scanners. The possibilities of using pixel detectors for creating multimodal SPECT/CT systems are demonstrated. The possibilities of using pixel detectors for creating multimodal SPECT/CT systems are demonstrated. Much attention is paid to microtomography...
The PAMELA electromagnetic calorimeter consists of 44 single-sided silicon sensor planes interleaved with 22 plates of tungsten absorber. It provides a comprehensive information about spatial development of hadronic showers, and about deposited energy amount.
In this work, Monte Carlo simulations (based on Geant4) performed using different available models, including Fritiof (FTF) and Quark...
Multinucleon transfer (MNT) reactions are known as possible access to neutron-rich isotopes of heavy and superheavy nuclei, but their application in experiments is complicated by a broad angular distribution of emitted products. A new superconducting solenoid GASSOL is being designed in FLNR JINR, the main purpose of which is an investigation of the chemical properties of superheavy elements....
The method of induced activity was used to study photonuclear reactions on a natural mixture of strontium isotopes. The experiment was performed on a bremsstrahlung of the RM-55 electron accelerator at an electron energy of 55 MeV. A brake target made of tungsten was used. Between the brake target with strontium target was placed copper monitor. During irradiation the electron current of the...
