A5010244692- Atomic and Subatomic Physics Research
- Quantum, superfluid, helium dynamics
- Nuclear Physics and Applications
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Radiation Detection and Scintillator Technologies
- Cold Atom Physics and Bose-Einstein Condensates
- Nuclear reactor physics and engineering
- Advanced NMR Techniques and Applications
- Radioactive Decay and Measurement Techniques
- Superconducting Materials and Applications
- Quantum Chromodynamics and Particle Interactions
- Advanced Materials and Mechanics
- Advanced MRI Techniques and Applications
- Advanced Frequency and Time Standards
- Electromagnetic Launch and Propulsion Technology
- Gamma-ray bursts and supernovae
- Soft Robotics and Applications
- Structural Analysis and Optimization
- Plasma Diagnostics and Applications
- Fusion materials and technologies
- Nuclear physics research studies
- Robotic Mechanisms and Dynamics
Kurchatov Institute
1997-2024
Petersburg Nuclear Physics Institute
2014-2023
Russian Academy of Sciences
2004-2011
Neutron lifetime is one of the most important physical constants: it determines parameters weak interaction and predictions primordial nucleosynthesis theory. There remains unsolved problem a 3.9\ensuremath{\sigma} discrepancy between measurements this using neutrons in beams those with stored ultracold (UCN). In our experiment we measure trapped by Earth's gravity an open-topped vessel. Two configurations trap geometry are used to change mean frequency UCN collisions surfaces; achieved...
The experiment Neutrino-4 started in 2014 with a detector model and continued full-scale 2016--2021. In this article, we describe all the steps of preparatory work on experiment. We present results increased statistical accuracy provided to date. experimental setup is constructed measure flux spectrum reactor antineutrinos as function distance center active zone SM-3 (Dimitrovgrad, Russia) range 6--12 meters. Using collected data, performed model-independent analysis determine oscillation...
The violation of Baryon Number, $\mathcal{B}$, is an essential ingredient for the preferential creation matter over antimatter needed to account observed baryon asymmetry in universe. However, such a process has yet be experimentally observed. HIBEAM/NNBAR %experiment program proposed two-stage experiment at European Spallation Source (ESS) search number violation. will include high-sensitivity searches processes that violate by one or two units: free neutron-antineutron oscillation...
Our experiment using gravitationally trapped ultracold neutrons (UCN) to measure the neutron lifetime is reviewed. Ultracold were in a material bottle covered with perfluoropolyether. The was deduced from comparison of UCN losses traps different surface-to-volume ratios. precise value fundamental importance particle physics and cosmology. In this experiment, storage time brought closer than any experiments before: probability trap only 1% that for $\ensuremath{\beta}$ decay. obtained,...
The idea of a hidden sector mirror partners elementary particles has attracted considerable interest as possible candidate for dark matter. Recently it was pointed out by Berezhiani and Bento that the present experimental data cannot exclude possibility rapid oscillation neutron n to n' with time much smaller than lifetime. A dedicated search vacuum transitions n->n' be performed at weak magnetic field, where both states are degenerate. We report result our experiment, which compares...
The search for an electric dipole moment (EDM) of the neutron is a crucial test theoretical particle physics models with violation time and spatial invariance. A new experiment recently has been carried out at High-Flux Reactor Institut Laue-Langevin, using upgraded double-chamber magnetic resonance spectrometer developed Petersburg Nuclear Physics Institute. result interpreted as upper limit on value EDM,...
An analysis of data on measurements neutron lifetime is presented. The new most accurate result the measurement [Phys. Lett. B 605, 72 (2005)] $878.5\ifmmode\pm\else\textpm\fi{}0.8$ s, differs from world average value 667, 1 (2008)] $885.7\ifmmode\pm\else\textpm\fi{}0.8$ by 6.5 standard deviations. In this connection an and Monte Carlo simulation experiments 483, 15 (2000)] Rev. 63, 593 (1989)] carried out. Systematic errors about $\ensuremath{-}6$ s are found in each experiments. A summary...
Abstract The analysis of experiments on measuring neutron lifetime has been made. latest most accurate result the [Phys. Lett. B 605, 72 (2005)] 878.5 ± 0.8 s differs from world average value 667, 1 (2008)] 885.7 ± 0.8 s by 6.5 standard deviations. In view this both and Monte Carlo simulation 483, 15 (2000)] Rev. 63, 593 (1989)] have performed. Systematic errors about –6 s found in experiments. table results measurements is given after corrections additions A new 880.0 ± 0.9 s given. Here...
There has been designed an experimental project "Neutrino-4" for 100 MW reactor SM-3 to test the hypothesis of "reactor antineutrino anomaly". Advantages such experiment are low background conditions as well small dimensions a core - 35x42x42 cm3. One carried on Monte-Carlo modeling position sensitive detector consisting 5 operation sections, which result displacement, covers distance from 6 13 meters core. succeeded in obtaining area sensitivity oscillation parameters, enables verify...
One has investigated possibility of performing NEUTRINO-4 experiment on search for reactor neutrino oscillations into a sterile state at research reactors. The simulated been conducted 16 MW WWR-M in PNPI with the purpose implementing full scale help 100 SM-3 RIAR. Background conditions making such an have examined both conclusion made possible implementation