N.V. Maksyuta, V.I. Vysotskii, D.N. Maksyuta, S.V. Efimenko, Y. Slinchenko
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引用次数: 0
Abstract
The work investigates the conditions for the possibility of using the quadratic
approximation U(ρ) = αρ2 for the interaction potentials of channeled
positrons with the inner walls of non-chiral carbon nanotubes of types (n, 0) and
(n, n). In particular, (8, 0), (10, 0), (12, 0) and (8, 8), (10, 10), (12, 12)
nanotubes were selected. In this case, when calculating the single-particle potential of the
carbon atom, only the contribution of valence electrons was taken into account. As a result of
this approximation, the parameters α were determined for all the nanotubes
studied. Using wave functions and the corresponding quantum levels of transverse energy obtained
by solving the Schrödinger equation, the probabilities of occupation of these levels were
calculated for positron beams with zero angular dispersion moving along the axes of
nanotubes. Based on this information, values of the longitudinal energy of positrons for which the
quadratic approximation is applicable were determined for all the studied nanotubes. Spectral
distributions of spontaneous radiation were calculated in the dipole approximation for
non-dispersive relativistic positron beams, both within the framework of quantum-mechanical and
classical approaches.
期刊介绍:
Journal of Instrumentation (JINST) covers major areas related to concepts and instrumentation in detector physics, accelerator science and associated experimental methods and techniques, theory, modelling and simulations. The main subject areas include.
-Accelerators: concepts, modelling, simulations and sources-
Instrumentation and hardware for accelerators: particles, synchrotron radiation, neutrons-
Detector physics: concepts, processes, methods, modelling and simulations-
Detectors, apparatus and methods for particle, astroparticle, nuclear, atomic, and molecular physics-
Instrumentation and methods for plasma research-
Methods and apparatus for astronomy and astrophysics-
Detectors, methods and apparatus for biomedical applications, life sciences and material research-
Instrumentation and techniques for medical imaging, diagnostics and therapy-
Instrumentation and techniques for dosimetry, monitoring and radiation damage-
Detectors, instrumentation and methods for non-destructive tests (NDT)-
Detector readout concepts, electronics and data acquisition methods-
Algorithms, software and data reduction methods-
Materials and associated technologies, etc.-
Engineering and technical issues.
JINST also includes a section dedicated to technical reports and instrumentation theses.