For the demanding of recent research with radioactive ion beams at the new fragment separator ACCULINNA-2 [1], a modular neutron spectrometer based on stilbene crystals and 3โ ET-Enterprise 9822B photomultipliers has been routinely employed to study the properties of light exotic nuclei, for instance: 5-7H, 7,9He, 10Li [2-4] lying close to boundary of ฮฒ-stability. Nonetheless, the detailed...
A thorough investigation of neutron-halo nuclear systems such as 7H, which decay through neutron emission, requires the development of a sophisticated system of neutron detectors. At Flerov Laboratory of Nuclear Reactions, a neutron time-of-flight spectrometer of 110 BC-404 plastic-based scintillators was proposed. An individual detector module consists of a 75-mm thick, hexagon-shaped BC-404...
The performance of the Scintillation Wall (ScWall) detector during the first physics run of the BM@N fixed target experiment with Xe+CsI at 3.8 AGeV has been demonstrated. Only charged fragments with charges Z = 1 and Z = 2 were observed in the scintillator detectors of the central part of the ScWall, while fragments with charges up to Z = 5 were also visible close to the beam hole. Comparison...
The study of spontaneous fission processes in heavy and superheavy nuclei remains an important task in nuclear physics. A Time-Projection Chamber (TPC) is a reliable tool for such investigations, enabling the detection of fission fragment trajectories, fragment energy measurements, and mass distributions of fission fragments. As part of our project, a TPC-based detector is being developed for...
To understand the possibilities of synthesizing new elements 119 and 120, it is of particular importance to determine the most optimal reactions. This issue depends both on the reaction cross-section value and the availability of the necessary target isotopes and accelerated ions. To do this, it is important to measure the cross sections of reactions that lead to lighter elements, but whose...
Today, along with standard nuclear reaction approaches such as fragmentation, fission or fusion, the use of multi-nucleon transfer reactions (MNT, MultiNucleonTransfer) is a potential method to reach the field of unknown exotic heavy and superheavy nuclei enriched with protons/neutrons. In addition to studies of the kinematics and cross sections of the formation of products of MNT reactions,...
The collision of two heavy nuclei takes a special place in nuclear reactions studies due to the collective rearrangement of a large number of nucleons in a very short span of time, typically of the order 10$^{โ20}$ seconds. During this collision, a significant number of nucleons are transferred between the projectile and target nuclei due to the influence of different reaction mechanisms [1]....
The knowledge about (n,$\gamma$) and (n,n'$\gamma$) correlations is very useful for understanding the process of inelastic neutron scattering and for estimation of the influence of the direct and compound nucleus (CN) mechanisms on the nuclear reaction. A detailed review of the CN approach is presented in [1], the direct mechanism is described in [2]. The formalism reported in [1] works quite...
The study of neutron-induced nuclear reactions on carbon is of interest both from the point of view of improving data on the properties of carbon excitation levels and for refining model parameters for describing the neutron interaction mechanism with carbon nuclei. Carbon plays an important role in the process of nucleosynthesis, in particular, according to F. Hoyle, the existence of life on...
The work will be presented on the development of a system of scintillation detectors for space radiation suppression in the experiment aims to study dd-fusion reactions with the low beam energy (PolFusion). The PolFusion nuclear physics experiment carried out at the Petersburg Nuclear Physics Institute (Gatchi-na), the purpose of which is to study the fusion reaction of 2H (d, p) 3H and 2H (d,...
SPD (Spin Physics Detector) is a universal experimental setup that is planned to be installed at the NICA collider under construction. In the first phase of the experiment, the vertex detector will not be used, which will lead to a significant degradation of the momentum resolution and reduce the efficiency of track recognition and secondary vertex reconstruction. To minimize this effect, we...
The 232Th + 48Ca reaction has been studied at the gas-filled separator DGFRS-2 online to the cyclotron DC280 at the SHE Factory at JINR. At three low 48Ca energies, three new even-even nuclides were synthesized for the first time: a spontaneously fissioning (SF) 268Sg with the half-life TSF = 13 s; an alpha-decaying 272Hs with T = 0.16 s and E = 9.63 ยฑ 0.02 MeV; and 276Ds with T1/2 = 0.15 ms,...
The performance of a prototype amplifying element for gas-discharge detectors made of polyurethane by a combination of stereolithography, laser drilling and magnetron sputtering has been demonstrated.
An array of 20ร20 conical-shaped holes with a solution angle of 78ยฐ was formed on an area of 40 mm$^2$. The average diameter of the holes was 300ยฑ30 ฮผm on the non-metallised side and 200ยฑ20 ฮผm...
The BM@N experiment, located at the Nuclotron facility of the Joint Institute for Nuclear Research (JINR) in Dubna, is a fixed-target experiment aimed at studying heavy ion collisions at beam energies up to 4 A GeV. One of the primary goals of the experiment is to measure neutron spectra and yields, which are essential for understanding the dynamics of these collisions. To address the...
The study of light unstable isotopes that decay through the emission of protons or neutrons, is a significant area of interest in modern nuclear physics, as many of these processes remain poorly understood. Some decays, such as the true four-proton decay, are yet to be observed experimentally.
The EXPERT (EXotic Particle Emission and Radioactivity by Tracking) project is a part of the...
Radon is a naturally occurring noble radioactive gas formed by the decay of radioactive chains of thorium and uranium. Radon and its daughter decay products are being increasingly studied, and their background contribution to low-background experiments for neutrino studies, dark-matter particle searches and other experiments requiring low-background conditions is also being investigated.
At...
Accurate determination of total efficiency is crucial for correcting the gamma coincidence summing effect in HPGe detectors. Normally, this efficiency curve is calibrated using experimental spectra from mono-peak standard sources, a method known for its high accuracy. However, in many experimental scenarios, suitable standard sources may not always be available. To overcome this limitation,...
In the study of the interaction between fusion plasma containing helium and materials, destructive methods with layer-by-layer analysis, methods based on helium recoil nuclei detection, or various simulation studies that measure the change in sample mass under plasma exposure are typically used. The challenge with using recoil nuclei detection lies in the high requirements for surface...
Semiconductor pixelated detectors are expanding their applications in high-energy physics, medicine and environmental radiation monitoring. This type of detector allows for the registration of every single photon at a sufficiently high flux. To achieve a good energy resolution of the detector, per-pixel procedure of energy calibration is required, and monochromatic X-ray sources are needed for...
In nuclear medicine, radioisotopes are used for diagnostic procedures, bone and tumor scans, radioisotope therapy and sterilization of medical devices [1]. Steady production of widely used and promising isotopes is essential for medical progress. Currently the majority of medical isotopes are produced in nuclear reactors or cyclotrons. However, disruptions and planned reactor shutdowns...
There is very little experimental data on isomeric ratios in photonuclear reactions on mercury isotopes in the literature, especially for energies of the order of 50-60 MeV. To obtain isomeric ratios during the reactions of ${}^{nat}Hg(\gamma,inkp)$, a $\gamma$-activation experiment was conducted [1] on irradiation of a sample of natural mercury with a bremsstrahlung beam from the RTM-55...
One of the low-abundance isotope for radionuclide therapy of osseal metastasis in castration-resistant prostate cancer is the isotope Ra-223. The usage of a radionuclide based on Ra-223 is due to a high concentration of radiation on osseous issue foci.
The purpose of the research is to develop a new and promising method for producing a radiopharmaceutical based on Ra-223 using aluminum...
This abstract discusses the design and application areas of the automated and robotic gamma spectrometric complex (ARGSC) developed by the employees of the radiation laboratory of the National Research Nuclear University "MEPhI". The basis of ARGSC is a xenon gamma detector with high spectrometric and operational characteristics. The designed complex is intended for detecting and registering...
Modelling polarized atomic beam source (PABS)
Introduction. The PolFusion experiment [1] aims to study the nuclear fusion of polarized deuterium and deuterons at beam energies in the laboratory frame up to 100 keV. There are two reaction channels considered for this process:
d + d = \begin{cases} t + p \\ ^3\text{He} + n \end{cases}
Studying these channels will expand our...
