In connection with the assumption that sterile neutrinos are right neutrinos, an analysis of the current experimental situation in neutron decay for right currents was performed. As a result of the analysis, it was found that there is an indication of the existence of a right vector boson W_R with a mass M_(W_R )=304_(-20)^(+24) GeV, and a mixing angle with W_L: ζ = -0.039±0.014. It is shown...
Information from existing studies on heavy metal concentrations in mosses is an invaluable resource for international negotiations on heavy metal pollution. Results from moss studies help investigate both spatial and temporal trends of heavy metals in atmospheric sediments. Besides, these studies allow the identification of places with high levels of atmospheric pollutants that spread over...
A new high-brilliance ultracold neutron source at the IBR-2 pulsed reactor is currently being developed at the FLNP JINR. Work on the project of a new type of UCN source requires conducting of a series of methodical experiments with very cold neutrons, which are currently not feasible at JINR. Therefore, at the first stage of work on the project, it is planned to create a test VCN channel. It...
The work is devoted to the creation of a new ultracold neutron source based on superfluid helium for researches in the field of physics of fundamental interactions at the PIK reactor. This source is aimed at obtaining a world record UCN density of 2200 cm-3.
For this source we have developed and implemented the whole scope of technologies allowing us to make UCN sources based on superfluid...
Impact of ANIS Beam Parameters on Single Event Burnout Testing in SiC Power Devices
Investigation of Background Calculation Methods for CSNS Neutron Scattering Spectrometer
In series of the photo-fission reactions, namely, 235, 238U(γ, f), 232Th(γ, f), 242Pu(γ, f) we have found that some part of the fission fragments (FFs) are presumably born in the state of the fission isomer with the yield Y ≈ 10–3/binary fission and with the lifetime τisom > 400 nsec [1, 2]. A binary break-up of such fragments was observed...
This report presents the results of a study on the SLED (SLAC Energy Doubler) system effect installed on the first accelerating section feeder of the LUE-200 of the IREN facility on the energy spectrum of electrons. This work is based on analytical calculations of the LUE-200 accelerator beam dynamics conducted by BINP SB RAS specialists in 2020.
In regions such as Pabna, Bangladesh, where groundwater is the primary source of drinking water, arsenic contamination in both soil and groundwater poses a significant threat to human health.
Neutron Activation Analysis (NAA) is a highly sensitive and precise analytical technique capable of detecting and quantifying trace levels of arsenic, even at concentrations as low as parts per billion...
In nuclear reaction induced by slow and resonant neutrons on 35Cl nucleus followed by proton emission, the forward–backward effect was investigated. In the frame of the model of mixing states of compound nucleus with the same spin and opposite parities, cross sections, angular correlations and asymmetry coefficients were evaluated. Using theoretical calculations, measurement of...
Monte Carlo-based Study on Signal and Noise Characteristics of BNCT-SPECT Systems
Prompt fission neutron spectra (PFNS) of 241Am(n,F), 242mAm(n,F) and 243Am(n,F) are obtained at 10-5 <En <20 MeV. The methods of analysis of integral PFNS for americium nuclides were elaborated via comprehensive analysis of 233,235,238U(n,F) and 239,240Pu(n,F) PFNS data [1, 2]. Average PFNS energies of 241,242m,243Am(n,F) are strictly correlated with fission chances contributions...
Research progress of 3MeV high-frequency pulse proton accelerator
The Neutrino-4 collaboration improved the detector in the first neutrino laboratory at SM-3 reactor. Also, we have been creating a new neutrino laboratory at the same reactor to study light sterile neutrinos. In the Neutrino-4 experiment, an oscillation effect was observed at a confidence level of 2.7σ, which is in good agreement with the gallium anomaly and the result of the BEST experiment,...
With the continuous development of neutron sources in various fields, achieving efficient miniaturization of accelerator-based neutron sources has become a research hotspot. Traditional large-scale neutron sources devices are limited by their large size and high energy consumption, restricting their feasibility in small laboratories and field applications. Therefore, designing a compact and...
In [1-3] the virtual mechanism of ternary fission of the compound nucleus $(A, Z)$, formed by the capture of the thermal neutron by target-nucleus $(A-1, Z)$ as the two-stage process was suggested. At the first stage light particle $(A-A_{LP},Z-Z_{LP})$ with kinetic energy close to the Coulomb barrier height is emitted from the nucleus $(A, Z)$ with the forming of the virtual state of the...
The neutron instrument complex "Neutron Beta Decay" will be located on the beam of polarized cold neutrons on the GEK-3 N0 channel. The installation is designed to measure the asymmetries of neutron beta decay with a relative accuracy of 0.1%. The basis of the installation is a superconducting solenoid that creates a magnetic field in a uniform region of 0.35 T. Electrons and protons appeared...
Khafizov R. U. a, Kolesnikov I.A. a, Nikolenko M.V. a, Tarnovitsky S.A. a, Tolokonnikov S. V. a, Torokhov V.D. a, Trifonov G.M. a, Solovei V.A. a, Kolkhidashvili M.R. a, Konorov I.V. b
a NRC «Kurchatov Institute», Russia, khafizov_ru@nrcki.ru
b Technical University of Munich, Munich, Germany
The report considers the time spectra of double and triple coincidences of the neutron...
