Physics of Elementary Particles and Atomic Nuclei
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Volume 48 (year 2017), parts: 1
XIV International Seminar on Electromagnetic Interactions of Nuclei "EMIN-2015" (Moscow, October 5-8, 2015) (179 kb)
Kuzyakin R.A., Sargsyan V.V., Adamian G.G., Antonenko N.V.
Quantum Diffusion Description of Large-Amplitude Collective Nuclear Motion (rus, 3.1 Mb)
Within the microscopic quantum diffusion approach, the method to calculate the probability of passing through the parabolic barrier and the quasistationary thermal decay rate from a metastable state is developed. The method is used both in the limit of linear coupling in the momentum between the collective subsystem and environment and in the more general limit of linear coupling in the momentum and the coordinate. In terms of the considered approach, the capture process of the projectile by the target nucleus is studied at bombarding energies near and below the Coulomb barrier. The analytical expression for partial capture probability which defines the formation cross section of a dinuclear system is derived. The total and partial capture cross sections, mean and mean-square angular momenta of the captured systems, astrophysical S-factors, logarithmic derivatives, and barrier distributions are calculated for various reactions. The effects of entrance channel, isotopic composition, and nuclear deformation of interacting nuclei and neutron transfer between them on capture cross section are studied. %The effects of nuclear deformation and neutron transfer between interacting nuclei, the isotopic dependence of capture cross section, the entrance channel effects on capture process are studied. The calculated results for the reactions with spherical and deformed nuclei are in a good agreement with available experimental data.
Bezrukov L., Sinev V.
Atmospheric Neutrinos for Investigation of the Earth Interior (rus, 70 Êb)
Properties of Perturbations in Conformal Cosmology (rus, 775 Êb)
We consider properties of perturbations in conformal cosmology. We study perturbations in the early Universe in different models with conformal invariance, which could be alternatives to inflation. Here we describe power spectrum, statistical anisotropy and non-Gaussianity of scalar perturbations and power spectrum of tensor modes.
Injection and Stability of High-Intensity Ion Beam in Synchrotrons with Electron Cooling (rus, 9.9 Ìb)
The electron cooling stacking injection is one of most widely used injection method applied for formation of a high-intensity cooled ion beams in the synchrotrons. The maximal available ion intensity in the synchrotron is defined by the ion life time and the cooling-stacking efficiency. The formation of the cooled high-intensity beams is restricted by their instability leading to strong ion life time reduction. The results of experimental investigations and simulations of the cooling-stacking injection and stability of the high-intensity cooled ion beams are discussed for synchrotrons with electron cooling.
Computer Simulation of Compact Isochronous Cyclotron (rus, 532 Êb)
The computer modeling methods of a compact isochronous cyclotron are described. The main analysis stages of accelerating setup systems are considered. The described methods are based on theoretical fundamentals of cyclotron physics and mention highlights of creation of the physical project of a compact cyclotron. The main attention is paid to the analysis of the beam dynamics, formation of a magnetic field, stability of the movement and a realistic assessment of intensity of the received bunch of particles. The sequence of creation of the accelerator computer model, analytical ways of an assessment of the accelerator parameters and the main techniques of the numerical analysis of dynamics of the particles are described.
Accelerator Based Epithermal Neutron Source (rus, 2.7 Ìb)
The current status of the development of accelerator sources of epithermal neutrons for Boron Neutron Capture Therapy, a promising method of treatment of malignant tumors, is presented. Particular attention is given to the source of epithermal neutrons on the basis of a new type of charged particle accelerator - tandem accelerator with vacuum insulation, and lithium neutron producing target. It is also shown that the accelerator with specialized targets allows us to generate fast and monoenergetic neutrons, resonance and monoenergetic rays, particles and positrons.
Synopsis (rus, 42 Kb)
Author index (rus)
Subject index (rus)
V. A. Matveev
V. L. Aksenov, Nguen Van Hieu
A. B. Arbuzov,
V. A. Bednyakov,
V. V. Burov,
M. A. Vasiliev,
V. V. Voronov,
R. V. Jolos,
P. I. Zarubin,
G. M. Zinovjev,
A. P. Isaev (Secretary),
E. A. Krasavin,
N. V. Krasnikov,
O. N. Krokhin,
E. V. Lychagin,
I. N. Meshkov,
Yu. Ts. Oganessian,
A. G. Popeko,
A. A. Starobinskii,
G. V. Trubnikov,
V. I. Yukalov
G. V. Fedorova
G. I. Smirnov