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| 2021 |
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E2-2021-55 (113.970)
Pestov I. B.
Complete General Relativity
Complete General Relativity is the Einstein theory that discloses the deeply hidden gauge nature of gravity and includes,
as a basis, the Principle of General Relativity with the Einstein metric field, on the one hand, and the Principle of General Gauge Relativity
with the general gauge field, on the other hand. The general gauge field is a nontrivial sourceless gauge field, which is of physical interest
as the natural and the only source of the Einstein gravitational field. Its singlet state becomes apparent in the form of familiar electromagnetic field.
The main equations of Complete General Relativity are established, and their physical content is discussed from different points of view.
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P6-2021-53 (216.314)
Efimov A. D., Izosimov I. N.
Extrapolation of the Energy of the Lowest States in the Superheavy Even-Even Nuclei
Based on the existing correlation between the deformation energy and the lowest excitation energy,
estimates were obtained for energy of the 2+1-states. The considered systematics of the energy ratios in the rotational band
also made it possible to obtain estimates for the 4+1- and 6+1-states.
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P14-2021-52 (222.396)
Rutkauskas A. V. et al.
Study of Silicate Sal-Gel Glasses Doped with Cu2Se and Eu
Nanoparticles by Means of Small-Angle Neutron Scattering and Atomic Force
Microscopy Methods
Silicate sal-gel glasses with Cu2Se nanoparticles doped with Eu have
been studied by small-angle neutron scattering and atomic force microscopy
methods. Structure characteristics both for Cu2Se nanoparticles and
density fluctuation areas of the glass matrix have been obtained from the
experimental data. We have found that changing of the Eu concentration makes
practically no effect on the morphology and the Cu2Se nanoparticle sizes.
However, the local changes have been observed in the structure of the glass
density heterogeneities. Possible structural mechanisms forming the
composite materials of complex composition are discussed.
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E9-2021-51 (687.204)
Kiyan I. N. et al.
Dipole Magnet M1 of the Beam Transportation Line of the AIC-144 Cyclotron
The paper presents the analysis results of the beam transportation lines of the multipurpose isochronous cyclotron AIC-144
located at the INP PAS (Krakow, Poland). Also, the paper presents the new M1 bending magnet, manufactured at the Research and Production Association «Atom» and DLNP JINR
factories (Dubna) and assigned to operate in the beam transportation system of the AIC-144 cyclotron.
The paper shows both the manufacturing technology of the M1 magnet and the results of the magnetic measurements.
In order to evaluate the influence of revealed deviation of the measured transverse magnetic field from the calculated one,
the beam dynamics was calculated using the calculated magnetic field map for the main operating mode of the AIC-144 cyclotron: p, Ek=60.7 MeV.
The calculation results showed that the new M1 bending magnet allows the beam rotation at a given angle with adjustment in the range from 68° to 70° at
a working current in the range from 250 to 270 A respectively. As a result, it was found that the proton beam meets the requirements for it.
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P5-2021-50 (578.074)
Dikusar N. D.
Numerical Solution of the Cauchy Problem Based on the Basic Element Method
Within the framework of the basic element method (BEM), a fundamentally new
approach to the numerical solution of the Cauchy problem for ODE (BEM—PC
method) is proposed. In BEM—PC, an explicit scheme of the
«predictor—corrector» type is used, conventionally called the «target
detection scheme». Calculation of the prediction for the next step is
carried out using two BEM-polynomials of the fifth degree, connected by
additional conditions. The first polynomial calculates the «aiming point»,
and the second determines the «target coordinate», i.e. a point close to the
exact solution. Such a scheme is stable in calculations with an extremely
small step (h = 10-17, 10-15). The method has been verified by a
stiff Cauchy problem test and comparisons with errors of popular classical
methods. With the help of examples it is shown that the accuracy of the
BÅÌ--PC method is not worse than the accuracy of the Runge—Kutta method of
the fourth order and also of Adams—Bashforth and Fehlberg methods of the
fifth order.
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P3-2021-49 (208.010)
Kiselev M. A. et al.
Investigation of the Possibilities of Analysis of the Vesicular Structure of PTNS-Based Nanodrugs Using the Small-Angle Neutron Scattering Data
In the framework of the separated form factors method, the analysis of small-angle neutron scattering (SANS) spectra from polydispersed
populations of unilamellar vesicles of the phospholipid transport nanosystem (PTNS) and the nanodrug indolip in heavy water in three concentrations was carried out.
The measurements were carried out on a YuMO small-angle spectrometer at the Frank Laboratory of Neutron Physics, JINR, Dubna. The possibilities of obtaining information
on the structure of nanodrugs based on the PTNS according to SANS data are discussed. The basic structural parameters of the indicated vesicular systems, obtained
on the basis of computer analysis of the SANS spectra, generally agree with the corresponding results of processing the data of small-angle X-ray scattering (SAXS).
At the same time, the SANS method turns out to be less sensitive compared to SAXS to a detailed account of the features of the structure of the vesicle bilayer.
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P18-2021-43 (389.756)
Gustova M. V. et al.
Risk Assessment of Radioecological Pollution in the Area of Operating Coal TPP
Environmental impact of the largest Mongolian thermal power plant TPP-4 in
Ulaanbaatar was researched. Content of the 34 elements and radioisotopes
(U- è Th-series, 40Ê, 137Ñs) at coal, bottom ash, fly ash
samples, soil and plants were measured by X-ray
fluorescence, gamma-activation analysis and gamma spectrometry.
It was shown that coal used at this power plant is enriched with trace
elements including toxic V, Ni, Cu, Pb, Bi and U. The estimate of soil pollution
was carried out. Radiation hazard for population under TPP
operation was evaluated by calculating absorbed dose rate in air (D), radium
equivalent activity (Raeq), external hazard index (Hex), annual
effective dose (H), excess lifetime cancer risk (ELCRoutdoor) and specific
effective activity (Aeff) of ash wastes.
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P3-2021-36 (112.614)
Frank A. I.
Neutron Focusing in Time and Magnification of the Time Lens
The question of the relationship between the duration of the pulse of the neutron flux generated
by the neutron source and the time image of this pulse formed by
a time lens that changes the neutron energy in a
certain way is considered. It is shown that the ratio of these magnitudes called
time magnification depends not only on the geometric parameters of the
device, as previously assumed, but also on the neutron velocity before and
after the lens.
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D15-2021-35 (244.413)
Adamczak A. et al.
The Yield of γ Quanta from the Reaction of Nuclear Fusion
in Muonic Molecules ptμ and pdμ
The yield of γ quanta from nuclear fusion reactions proceeding from various
spin states of muonic molecules ptμ and pdμ has been measured. The
work was performed at the Triton facility at JINR DLNP using a specially
designed liquid-tritium target. For the first time, channels of the
synthesis reaction with the yield of double γ quanta were observed:
ptμ → 4Heμ + γ + γ, pdμ → 3Heμ + γ + γ.
The data obtained for the yield of single γ quanta in the channel of the
fusion reactionptμ → 4Heμ + γare consistent with earlier
research. The partial sticking coefficient of a muon in the channel of pt-
and pd- fusion reactions with the yield of single γ quantum was determined
experimentally.
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P13-2021-30 (3.512.569)
Pepelyshev Yu. N., Sumkhuu D.
Optimization of Automatic Power Control System of the IBR-2M Pulsed
Reactor in the Presence of Instability
The paper presents the main results of computational and experimental
optimization of the automatic power control system (AR) of the IBR-2M pulsed
reactor in the presence of a high level of oscillatory instability.
Optimization of the parameters of the AR made it possible to significantly
reduce the influence of random and deterministic oscillations of reactivity
on the noise of the pulse energy, as well as to sharply reduce the
manifestation of the oscillatory instability of the reactor. As a result,
the safety and reliability of operation of the reactor has increased
substantially.
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P13-2021-29 (4.037.416)
Pepelyshev Yu.N., Tsogtsaikhan Ts.
The Dynamics of Oscillation Instability of the IBR-2M Reactor.
The Noise Analysis
The results of the study on noise dynamics and self-oscillations of the pulse
energy in the IBR-2M for period from 2012 at the power of 2 MW until the
middle of 2021 are presented. It is shown that with an increase in fuel burnup,
the power spectral density of the pulse energy noise becomes more complicated
and the amplitude of self-oscillations grows. Based on the data obtained, a
strategy was developed to suppress the oscillatory instability of the IBR-2M, up
to the life of the reactor in 2036. The need to continue research on the noise
dynamics and oscillatory instability of the IBR-2M reactor was shown
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P16-2021-25 (2.063.403)
Mokrov Yu. V., Morozova S. V., Schegolev V. Yu.
Determination of Correction Factors for Correction of the Individual Albedo Neutron Dosimeter DVGN-01 Readings in the Field of the DC-280 Accelerator
The paper presents the results of determining the correction coefficients for individual albedo
neutron dosimeters DVGN-01 of the AKIDK-301 complex for correcting their readings when used by personnel
in the field of the DC-280 accelerator.
The correction coefficients have been determined using a spherical albedo system under irradiation
at four points: in the accelerator hall near the radiation monitor and in front of the shield door from the accelerator hall (room 110) and in the beam output cabin (room 115). The obtained values of the coefficients
are in good agreement with the coefficients obtained earlier on the MC-400 and used in the individual
dosimetric control of the personnel of the FLNR.
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P3-2021-22 (474.392)
Frank A. I., Kulin G. V., Rebrova N. V., Zakharov M. A.
On the Possibility of Creating a UCN Source on a Periodic Pulsed Reactor
The possibility of creating a UCN source on a periodic pulsed reactor is
considered. It is shown that the implementation of the principle of time
focusing, based on nonstationary neutron diffraction, and the idea of pulse
filling of the trap for UCN allows us to create a sufficiently intense source
of UCN on a pulsed reactor of a moderate power.
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E19-2021-19 (2.073.536)
Koltovaya N., Zhuchkina N., Shvaneva N.
Mutation Induction by Heavy-Ion Beams with Different LET in Yeast it Saccharomyces cerevisiae
Unicellular eukaryotic yeast has been subjected to extensive radiobiological
and genetic investigations. We analyzed the lethal and mutagenic effects of
different linear energy transfer (LET) ionizing radiation in haploid yeast
Saccharomyces cerevisiae. The lethal effect, which was assessed by the slope of dose-effect
curve, was dependent on the LET. The most lethal effect of tested radiation
was for the 15N ion beam with LET of 108 keV/μm. This ion beam had a
three-times higher lethal effect than low-LET (0.2 keV/μm) γ rays.
The mutagenic effect was assessed by the frequency of canavanine resistant
mutations, reversions of frameshift and GC-AT substitution. More efficiently the
ionizing radiation induces base substitutions, complex mutations and less
efficiently — single nucleotide loss. As a rule, complex mutations are
combination of substitution and small deletion. It was shown that heavy ions
induced efficiently both small deletion (< 100 bp) and point
mutations. It is interesting that the 15N ion beam with LET of
108 keV/μm has also shown the most mutagenic effect.
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P4-2021-15 (341.197)
Efimov A. D., Izosimov I. N.
Systematic of the Yrast-Bands in the Region of Heavy and Superheavy Even-Even Nuclei
By using the extrapolation
method, the estimations of yrast-band level energies for heavy
and superheavy nuclei were obtained. For getting these estimations,
the information about the properties of the neighboring nuclei
was exploited. Such a method seems reasonable because for more
collective states in the considered region of nuclei the
yrast-band level energies varvary smoothly and slightly.
The obtained results are very significant both for the experiment
planning and for the analysis of the experimental data on the
observation and study of the β- and γ-decays of high-spin isomers in the region of heavy and superheavy nuclei.
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P3-2021-14 (2.100.133)
Aksenov V. L.
On the Training of Scientific Personnel for the Implementation of Strategic
Plans for the Development of Neutron Research at JINR
The analysis of methods of creating a system of training specialists at FLNP
in the period from the late 1980s to the present is performed. Recommendations are given in connection
with the start of the project to create a new ultra-high-intensity neutron source at JINR — the «Neptun» reactor,
which should replace the IBR-2 reactor upon completion of its operation.
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E2-2021-12 (3.917.746)
Abramov V. V. et al.
Possible Studies at the First Stage of the NICA Collider Operation
with Polarized and Unpolarized Proton and Deuteron Beams
The paper contains suggestions for experiments with usage of the Spin
Physics Detector (SPD) at the first stage of the NICA SPD Programme
developed at JINR. Double polarized pp, dd and pd collisions at c.m.s.
NN energies of 3.4–10 GeV, which will be accessible at the initial stage of
experiments, allow one to study spin dependence of the NN interaction,
search for multiquark states at double strangeness, charm and beauty
thresholds, study the short-range structure of the deuteron. Double
polarized pd scattering offers a possibility to test the Standard Model
through the search for T-invariance violation.
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P13-2021-11 (1.934.096)
Pepelyshev Yu. N., Sumkhuu D.
The Cycle Changing of Dynamics of the IBR-2M Pulsed Reactor
It is shown that in the IBR-2M reactor by the end of the reactor cycle,
changes in dynamics are observed associated with a strong weakening of the
fast power feedback (PFB), as a result of which the reactor becomes
oscillatory unstable. When the reactor is shut down, negative changes in
dynamics disappear and the stability of the reactor is restored. Thus, the
reactor undergoes cyclic changes in the oscillatory instability. The
correlation between a fast PFB and a slow PFB is experimentally observed,
which makes it possible to almost completely eliminate the cyclic component
of instability by changing the control mode of rods of the control system.
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P6-2021-6 (292.654)
Mukhin R. S. et al.
Reconstruction of Spontaneous Fission Neutron Multiplicity Distribution
Spectra by the Statistical Regularization Method
We propose a technique for reconstructing the multiplicity distribution of spontaneous
fission neutrons using the Tikhonov regularization method. The results obtained for 252No, 244Fm, 246Fm, and 248Cm are compared
with previously reconstructed distributions. The multiplicity distributions of spontaneous fission neutrons of 250No, 256Rf, and 254Rf were
reconstructed for the first time. For each spectrum, the mean number of neutrons per decay and the dispersion of the distribution were obtained.
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D18-2021-5 (301.267)
Eganova I. A. et al.
Ad Disputandum: The Most Topical Scientific Ideas That Were Highlighted in Time
of Coronavirus Pandemic
It is indisputable that without a proper worldview, without a proper understanding of physical reality,
science is unable to provide a sustainable future on our planet. It is expedient and very timely for the authors
to submit judgment presented in this article of the deep essence of the main results, which form the foundations
of the scientific understanding of objective reality. Talk is about a really adequate model of space–time,
about a physical mechanism of global (terrestrial and cosmic) interactions and about the planet Earth as superorganism — a representative
of a special form of cosmic life.
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P4-2021-4 (460.524)
Efimov A. D., Izosimov I. N.
High-Spin States of Yrast-Bands Even Isotopes Pu, Cm, Fm, No
In some isotopes of Pu, Cm, Fm, No, the yrast-band
state energies are experimentally known up to the spin 32+, like this
holds in 248Cm. What is unique is that all the states of these superlong bands remain purely collective. Collectivity of the bands manifests itself
in the fact that the band state energies are reproduced with a high degree
of accuracy within the framework of the phenomenology of the IBM1. The
uncertainty of the model parameters is reduced under condition that the
depth of the deformation energy obtained on the basis of realistic
interactions was equal to the deformation energy depth in the internal
state, calculated with the found parameters of the IBM1 Hamiltonian.
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2021-3 (5.317.371)
Brief Review of Topmost Scientific Results Obtained in 2020 at the Joint Institute for Nuclear Research
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