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Your search keyword '"E.V. Lychagin"' showing total 7 results
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7 results on '"E.V. Lychagin"'

1. Experimental setup for elemental analysis using prompt gamma rays at research reactor IBR-2

Author

C. Hramco, K. Turlybekuly, S.B. Borzakov, N.A. Gundorin, E.V. Lychagin, G.V. Nehaev, A. Yu Muzychka, A.V. Strelkov, and E. Teymurov

Subjects
Prompt gamma, Neutron activation analysis, Elemental analysis, IBR-2 FLNP JINR, Hydrogen content, Diamond powder, Nuclear engineering. Atomic power, TK9001-9401
Abstract

The new experimental setup has been built at the 11b channel of the IBR-2 research reactor at FLNP, JINR, to study the elemental composition of samples by registration of prompt gamma emission during thermal neutron capture. The setup consists of a curved mirror neutron guide and a radiation-resistant HPGe high-purity germanium detector. The detector is surrounded by lead shielding to suppress the natural background gamma level. The sample is placed in a vacuum channel and surrounded by a LiF shield to suppress the gamma background generated by scattered neutrons. This work presents characteristics of the experimental setup. An example of hydrogen concentration determining in a diamond powder made by detonation synthesis is given and on its basis, the sensitivity of the setup is calculated being ∼4 μg.

Published
2022
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3. Scientific program of DERICA — prospective accelerator and storage ring facility for radioactive ion beam research

Author

Leonid V. Grigorenko, Boris Yu. Sharkov, Andrei S. Fomichev, Aleksei L. Barabanov, V. Bart, A.A. Bezbakh, S.L. Bogomolov, Mikhail S. Golovkov, A.V. Gorshkov, Sergei N. Dmitriev, V.K. Eremin, Sergei N. Ershov, M.V. Zhukov, I.V. Kalagin, A.V. Karpov, T. Katayama, O.A. Kiselev, Aleksei A. Korsheninnikov, Sergei A. Krupko, T.V. Kulevoi, Yu.A. Litvinov, E.V. Lychagin, I.P. Maksimkin, Igor' N. Meshkov, I.G. Mukha, E.Yu. Nikol'skii, Yu.L. Parfenova, Vasilii V. Parkhomchuk, Sergei M. Polozov, M. Pfutzner, Sergei I. Sidorchuk, H. Simon, R.S. Slepnev, Gurgen M. Ter-Akopian, Grigorii V. Trubnikov, V. Chudoba, K. Scheidenberger, P.G. Sharov, P.Yu. Shatunov, Yurii M. Shatunov, Valery N. Shvetsov, N.B. Shulgina, A.A. Yukhimchuk, and S. Jaramyshev

Subjects
General Physics and Astronomy
Published
2018
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6. Coherent scattering of slow neutrons at nanoparticles in particle physics experiments

Author

G. V. Nekhaev, Valery Nesvizhevsky, Guillaume Pignol, A. V. Strelkov, E.V. Lychagin, A. Yu. Muzychka, K.V. Protasov, Institut Laue-Langevin (ILL), ILL, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), T. Soldner, V. Nesvizhevsky, C. Plonka-Spehr, K. Protasov, K. Schreckenbach, and O. Zimmer

Subjects
Condensed Matter::Quantum Gases, Physics, Nuclear and High Energy Physics, Range (particle radiation), 010308 nuclear & particles physics, Scattering, Physics::Optics, Nanoparticle, Neutron scattering, 01 natural sciences, 7. Clean energy, Wall material, Wavelength, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], 0103 physical sciences, Neutron, Physics::Atomic Physics, Particle physics experiments, Atomic physics, Nuclear Experiment, 010306 general physics, Instrumentation, ComputingMilieux_MISCELLANEOUS
Abstract

Usually Ultra Cold Neutrons (UCN) and Very Cold Neutrons (VCN) are not efficiently scattered by individual atoms in matter due to their large wavelength. On the contrary, such neutrons are coherently scattered by nanoparticles, providing a powerful tool, in particular for VCN reflectors, for VCN storage in closed traps, probably for ‘quasi-specular’ reflectors for cold neutrons, and for cooling VCN to the UCN energy range. On the other hand, quasi-elastic scattering of UCN at nanoparticles and large molecules (as those of Fomblin oil) in all presently used UCN trap wall materials causes false effects in the neutron lifetime measurements because of poorly controlled spectrum evolution.

Published
2009
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7. Identification of a new escape channel for UCN from traps

Author

D. G. Kartashov, A. G. Kharitonov, P Yaidjiev, Peter Geltenbort, V. N. Shvetsov, E.V. Lychagin, K. Schreckenbach, R. R. Tal’daev, J. M. Pendlebury, Valery Nesvizhevsky, A. P. Serebrov, A. V. Strelkov, and A. Yu. Muzychka

Subjects
Condensed Matter::Quantum Gases, Physics, Nuclear and High Energy Physics, Astrophysics::High Energy Astrophysical Phenomena, Neutron density, Trap (computing), Ultracold neutrons, Neutron, Physics::Atomic Physics, Atomic physics, Nuclear Experiment, Absorption (electromagnetic radiation), Instrumentation, Communication channel
Abstract

Ultra-cold neutrons (UCN) can be stored in a trap if their energy is lower than the trap wall potential. It is well known that the neutron density in a trap decreases due to neutron beta-decay, upscattering and absorption on surfaces but we have identified a complementary escape channel. This arises from a small increase in the energy of UCN during their interaction with a surface. Higher-energy neutrons can then escape into the bulk material or penetrate through the trap wall if it is thin enough.

Published
2000
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