Yu. N. Uzikov
A5085614522- Quantum Chromodynamics and Particle Interactions
- Nuclear physics research studies
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Atomic and Subatomic Physics Research
- Advanced NMR Techniques and Applications
- Quantum, superfluid, helium dynamics
- Atomic and Molecular Physics
- Nuclear Physics and Applications
- Superconducting Materials and Applications
- Advanced Chemical Physics Studies
- Particle Accelerators and Free-Electron Lasers
- Scientific Research and Discoveries
- Particle accelerators and beam dynamics
- Astronomical and nuclear sciences
- Neutrino Physics Research
- Magnetic confinement fusion research
- Advanced Data Storage Technologies
- Physics of Superconductivity and Magnetism
- Methane Hydrates and Related Phenomena
- Solid-state spectroscopy and crystallography
- Electron Spin Resonance Studies
- Computational Physics and Python Applications
- Geophysical and Geoelectrical Methods
- Distributed and Parallel Computing Systems
Joint Institute for Nuclear Research
2015-2024
Dubna State University
2008-2024
Lomonosov Moscow State University
2015-2024
Moscow State University
2013-2024
Petersburg Nuclear Physics Institute
2016
L. N. Gumilyov Eurasian National University
2016
Forschungszentrum Jülich
2003-2014
Campbell Collaboration
2009
Institute for Nuclear Research
2007
National Nuclear Center of the Republic of Kazakhstan
2005
A new method to determine the spin tune is described and tested. In an ideal planar magnetic ring, tune-defined as number of precessions per turn-is given by ν(s)=γG (γ Lorentz factor, G gyromagnetic anomaly). At 970 MeV/c, deuteron spins coherently precess at a frequency ≈120 kHz in Cooler Synchrotron COSY. The deduced from up-down asymmetry deuteron-carbon scattering. time interval 2.6 s, was determined with precision order 10^{-8}, 1×10^{-10} for continuous 100 s accelerator cycle. This...
We observe a deuteron beam polarization lifetime near 1000 s in the horizontal plane of magnetic storage ring (COSY). This long spin coherence time is maintained through combination bunching, electron cooling, sextupole field corrections, and suppression collective effects current limits. record required for search an intrinsic electric dipole moment on at statistical sensitivity level approaching 10^{-29} e cm.
This Letter reports the successful use of feedback from a spin polarization measurement to revolution frequency $0.97\text{ }\text{ }\mathrm{GeV}/c$ bunched and polarized deuteron beam in Cooler Synchrotron (COSY) storage ring order control both precession rate ($\ensuremath{\approx}121\text{ }\mathrm{kHz}$) phase horizontal component. Real time synchronization with radio (rf) solenoid made possible rotation out plane, yielding demonstration method manipulate polarization. In particular,...
The stable spin direction of polarized particles in a storage ring was determined first experimentally, through an accurate measurement the tune and its response to longitudinal magnetic fields.
Nuclear structure at short $NN$ distances is still poorly understood. In particular, the full quantum of nucleus with a correlated pair challenge to theory. So far, model descriptions have been limited average mean-field picture remaining nuclear system after removing pair. recent experiment BM@N Collaboration JINR [M. Patsyuk et al., Nat. Phys. 17, 693 (2021)], reactions $^{12}\mathrm{C}{(p,2p{n}_{s})}^{10}\text{B}$ and $^{12}\mathrm{C}{(p,2p{p}_{s})}^{10}\text{Be}$ induced by hard elastic...
We report on measurements of the differential cross section $d\ensuremath{\sigma}/d\mathrm{\ensuremath{\Omega}}$ and first measurement analyzing power ${A}_{y}$ in $\mathrm{\ensuremath{\Delta}}(1232)$ excitation energy region reaction $pp\ensuremath{\rightarrow}{{pp}}_{s}{\ensuremath{\pi}}^{0}$ where ${{pp}}_{s}$ is a $^{1}S_{0}$ proton pair. The experiment has been performed with ANKE spectrometer at COSY-J\"ulich. data reveal peak dependence forward section, minimum zero degrees its...
The proposed method exploits charged particles confined as a storage ring beam (proton, deuteron, possibly $^3$He) to search for an intrinsic electric dipole moment (EDM) aligned along the particle spin axis. Statistical sensitivities could approach 10$^{-29}$ e$\cdot$cm. challenge will be reduce systematic errors similar levels. adjusted preserve polarisation, initially parallel velocity, times in excess of 15 minutes. Large radial fields, acting through EDM, rotate polarisation from...
The integrated proton-deuteron cross section $\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{\ensuremath{\sigma}}$ for the case of incident proton vector polarization ${p}_{y}^{p}$ and tensor ${P}_{xz}$ deuteron target provides a null-test signal time-reversal invariance violating but $P$-parity conserving (TVPC) effects. We study observable within Glauber theory double-polarized $pd$ scattering. Full spin dependence ordinary strong $pN$ scattering amplitudes different types hypothetical TVPC...
The vector and tensor polarizations of a deuteron beam have been measured using elastic deuteron-carbon scattering at 75.6 MeV deuteron-proton 270 MeV. After acceleration to 1170 inside the COSY ring, deuterons were checked by studying variety nuclear reactions cluster target ANKE magnet spectrometer placed an internal position storage ring. All these measurements consistent with absence depolarization during provide number secondary standards that can be used in subsequent experiments facility.
Scattering of protons with transversal polarization ${p}_{y}^{p}$ on deuterons tensor ${P}_{xz}$ provides a null-test signal for time-reversal (T) invariance violating but parity (P) conserving effects. We calculate the corresponding observable at beam energies $100\text{--}1000\phantom{\rule{0.16em}{0ex}}\mathrm{MeV}$ within spin-dependent Glauber theory considering T-violating P-conserving nucleon-nucleon interactions. The $S$-wave component deuteron wave function as well $D$ are taken...
The unpolarised differential cross section and the two deuteron tensor analysing powers A xx yy of $$\vec dp \to \{ pp\} _s n$$ charge-exchange reaction have been measured with ANKE spectrometer at COSY storage ring. Using beams energies 1.2, 1.6, 1.8, 2.27GeV, data were obtained for small momentum transfers to a {pp} s system low excitation energy. results three lower are consistent impulse approximation predictions based upon current knowledge neutron-proton amplitudes. However, where...
A study of the deuteron breakup reaction $pd \to (pp)n$ with forward emission a fast proton pair small excitation energy $E_{pp}<$ 3 MeV has been performed at ANKE spectrometer COSY--J\"ulich. An exclusive measurement was carried out six proton--beam energies $T_p=$~0.6,~0.7,~0.8,~0.95,~1.35, and 1.9 GeV by reconstructing momenta two protons. The differential cross section reaction, averaged up to $8^{\circ}$ over cm polar angle total momentum $pp$ pairs, obtained. Since kinematics this...
The pp -> pi0 differential cross section has been measured with the ANKE spectrometer at COSY-Juelich for pion cms angles between 0 and 15.4 degrees a proton beam energy of 0.8 GeV. selection diproton pairs an excitation E_{pp} < 3 MeV ensures that final system is dominantly in spin-singlet 1S0 state. kinematics are therefore very similar to those d pi+ but different spin isospin transitions. results will thus provide crucial extra test production models nucleon-nucleon collisions....
The cross section for inclusive multipion production in the $pp\ensuremath{\rightarrow}ppX$ reaction was measured at COSY-ANKE four beam energies, 0.8, 1.1, 1.4, and 2.0 GeV, low excitation energy final $pp$ system, such that diproton quasiparticle is $^{1}S_{0}$ state. At three higher missing-mass ${M}_{X}$ spectra show a strong enhancement ${M}_{X}$, corresponding to an Abashian-Booth-Crowe effect moves steadily larger values as increased. Despite structure looking very different 0.8...
The pp -> {pp}_s pi0 differential cross section has been measured with the ANKE spectrometer at COSY-Juelich for seven proton beam energies T_p between 0.5 and 1.97 GeV. By selecting pairs an excitation energy of less than 3 MeV it is ensured that final system in 1S0 state. In region theta_{pp}^{cm} < 18 deg, data reveal a forward dip =< 1.4 GeV whereas peaking seen dependence shows broad peak 0.6-0.8 region, probably associated Delta(1232) excitation, minimum Some these features...
Spin-dependent total $\overline{p}d$ cross sections are considered using the optical theorem. For this aim full spin dependence of forward elastic scattering amplitude is in a model independent way. The single-scattering approximation used to relate elementary amplitudes $\overline{p}p$ and $\overline{p}n$ deuteron form factor. A formalism allowing take into account Coulomb-nuclear interference effects polarized developed. Numerical calculations for performed at beam energies 20--300 MeV...
The proton analysing power in $\vec{p}p$ elastic scattering has been measured at small angles COSY-ANKE 796 MeV and five other beam energies between 1.6 2.4 GeV using a polarised beam. asymmetries obtained by detecting the fast ANKE forward detector or slow recoil silicon tracking telescope are completely consistent. Although results agree well with many published data MeV, also most recent partial wave solution this energy, higher lie above predictions of angles. An updated phase shift...
In order to establish links between p-wave pion production in nucleon-nucleon collisions and low energy three-nucleon scattering, an extensive programme of experiments on is currently underway at COSY-ANKE. The final proton pair detected very excitation energy, leading S-wave diproton, denoted here as {pp}_s. We now report measurements the differential cross section analysing power pol{p}p->{pp}_s pi^0$ reaction 353 MeV. Both observables can be described terms s- d-wave and, by using phase...