7 research outputs found
Determination of pi-N scattering lengths from pionic hydrogen and pionic deuterium data
The pi-N s-wave scattering lengths have been inferred from a joint analysis
of the pionic hydrogen and the pionic deuterium x-ray data using a
non-relativistic approach in which the pi-N interaction is simulated by a
short-ranged potential. The pi-d scattering length has been calculated exactly
by solving the Faddeev equations and also by using a static approximation. It
has been shown that the same very accurate static formula for pi-d scattering
length can be derived (i) from a set of boundary conditions; (ii) by a
reduction of Faddeev equations; and (iii) through a summation of Feynman
diagrams. By imposing the requirement that the pi-d scattering length,
resulting from Faddeev-type calculation, be in agreement with pionic deuterium
data, we obtain bounds on the pi-N scattering lengths. The dominant source of
uncertainty on the deduced values of the pi-N scattering lengths are the
experimental errors in the pionic hydrogen data.Comment: RevTeX, 20 pages,4 PostScript figure
Numerical optimization of geometric configuration of large space structure
Π ΡΠ°Π±ΠΎΡΠ΅ ΡΠ°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°Π΅ΡΡΡ ΠΏΠ΅ΡΡΠΏΠ΅ΠΊΡΠΈΠ²Π½ΡΠΉ ΠΏΡΠΎΠ΅ΠΊΡ ΠΊΠΎΡΠΌΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π°ΠΏΠΏΠ°ΡΠ°ΡΠ° Π½Π°Π±Π»ΡΠ΄Π΅Π½ΠΈΡ Ρ Π΄ΠΈΡΡΠ°ΠΊΡΠΈΠΎΠ½Π½ΠΎΠΉ ΠΎΠΏΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΠΈΡΡΠ΅ΠΌΠΎΠΉ. ΠΡΠΎΠ²ΠΎΠ΄ΠΈΡΡΡ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅ ΠΏΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½Π½ΠΎΠΉ Π°Π²ΡΠΎΡΠ°ΠΌΠΈ ΡΠ°Π½Π΅Π΅ ΡΠΈΠ»ΠΎΠ²ΠΎΠΉ ΡΡ
Π΅ΠΌΡ ΠΊΡΠ΅ΠΏΠ»Π΅Π½ΠΈΡ Π΄ΠΈΡΡΠ°ΠΊΡΠΈΠΎΠ½Π½ΠΎΠΉ Π»ΠΈΠ½Π·Ρ. Π ΡΡΠΎΠΉ ΡΠ°Π±ΠΎΡΠ΅ c ΠΏΠΎΠΌΠΎΡΡΡ ΡΠΈΡΠ»Π΅Π½Π½ΠΎΠΉ ΠΎΠΏΡΠΈΠΌΠΈΠ·Π°ΡΠΈΠΈ Π½Π°Ρ
ΠΎΠ΄ΡΡΡΡ ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΡΠ΅ Π·Π½Π°ΡΠ΅Π½ΠΈΡ Π³Π΅ΠΎΠΌΠ΅ΡΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ² ΠΊΠΎΠ½ΡΡΡΡΠΊΡΠΈΠΈ Ρ ΡΡΠ΅ΡΠΎΠΌ Π΅Π΅ ΠΆΠ΅ΡΡΠΊΠΎΡΡΠ½ΡΡ
Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊ. The paper considers a promising project of a spacecraft with a diffraction optical system. The study of the previously proposed power scheme of the diffraction lens attachment is carried out. In this work, the optimal values of the geometric parameters of the structure with regard to its stiffness characteristics are found by means of numerical optimization
Off-shell effects in electron-hydrogen interaction
SIGLECopy held by FIZ Karlsruhe; available from UB/TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman
Three-body calculation of deuteron-nucleus Coulomb field interaction
SIGLECopy held by FIZ Karlsruhe; available from UB/TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman
Effective interaction in three-charged particle system
SIGLECopy held by FIZ Karlsruhe; available from UB/TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman
Optimization of the design parameters of the diffraction lens for the perspective project of the observation spacecraft
Π ΡΠ°Π±ΠΎΡΠ΅ ΡΠ°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°Π΅ΡΡΡ ΠΏΠ΅ΡΡΠΏΠ΅ΠΊΡΠΈΠ²Π½ΡΠΉ ΠΏΡΠΎΠ΅ΠΊΡ ΠΊΠΎΡΠΌΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π°ΠΏΠΏΠ°ΡΠ°ΡΠ°
Π½Π°Π±Π»ΡΠ΄Π΅Π½ΠΈΡ Ρ Π΄ΠΈΡΡΠ°ΠΊΡΠΈΠΎΠ½Π½ΠΎΠΉ ΠΎΠΏΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΠΈΡΡΠ΅ΠΌΠΎΠΉ. Π Π΅ΡΠ°Π΅ΡΡΡ Π·Π°Π΄Π°ΡΠ° ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠ΅Π½ΠΈΡ
ΡΡΠ°Π±ΠΈΠ»ΡΠ½ΠΎΠ³ΠΎ ΠΏΠΎΠ»ΠΎΠΆΠ΅Π½ΠΈΡ ΡΠ»Π΅ΠΌΠ΅Π½ΡΠΎΠ² ΠΎΠΏΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΠΈΡΡΠ΅ΠΌΡ. ΠΠ»Ρ ΡΡΠΎΠ³ΠΎ ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΠ΅ΡΡΡ
ΠΏΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½Π½Π°Ρ Π°Π²ΡΠΎΡΠ°ΠΌΠΈ ΡΠ°Π½Π΅Π΅ ΡΠΈΠ»ΠΎΠ²Π°Ρ ΡΡ
Π΅ΠΌΠ° ΠΊΡΠ΅ΠΏΠ»Π΅Π½ΠΈΡ Π΄ΠΈΡΡΠ°ΠΊΡΠΈΠΎΠ½Π½ΠΎΠΉ Π»ΠΈΠ½Π·Ρ. Π‘
ΠΏΠΎΠΌΠΎΡΡΡ ΡΠΈΡΠ»Π΅Π½Π½ΠΎΠΉ ΠΎΠΏΡΠΈΠΌΠΈΠ·Π°ΡΠΈΠΈ Π½Π°Ρ
ΠΎΠ΄ΡΡΡΡ ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΡΠ΅ Π·Π½Π°ΡΠ΅Π½ΠΈΡ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ²
ΠΊΠΎΠ½ΡΡΡΡΠΊΡΠΈΠΈ Ρ ΡΠΎΡΠΊΠΈ Π·ΡΠ΅Π½ΠΈΡ ΠΌΠΈΠ½ΠΈΠΌΠΈΠ·Π°ΡΠΈΠΈ Π΅Π΅ ΠΌΠ°ΡΡΡ. A promising project of an observation spacecraft with a diffractive optical system is
considered. The problem of ensuring a stable position of the elements of the optical system is
solved. For this purpose, the power scheme of the attachment of a diffraction lens proposed by
the authors is used. With the help of numerical optimization, the optimal values of the design
parameters are found from the point of view of minimizing its mass.Π Π°Π±ΠΎΡΠ° Π²ΡΠΏΠΎΠ»Π½Π΅Π½Π° ΠΏΡΠΈ ΠΏΠΎΠ΄Π΄Π΅ΡΠΆΠΊΠ΅ ΠΠΈΠ½ΠΈΡΡΠ΅ΡΡΡΠ²Π° ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΡ ΠΈ Π½Π°ΡΠΊΠΈ Π ΠΎΡΡΠΈΠΉΡΠΊΠΎΠΉ Π€Π΅Π΄Π΅ΡΠ°ΡΠΈΠΈ Π²
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Π€Π΅Π΄Π΅ΡΠ°Π»ΡΠ½ΠΎΠΉ ΡΠ΅Π»Π΅Π²ΠΎΠΉ ΠΏΡΠΎΠ³ΡΠ°ΠΌΠΌΡ Β«ΠΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΠΈ ΡΠ°Π·ΡΠ°Π±ΠΎΡΠΊΠΈ ΠΏΠΎ ΠΏΡΠΈΠΎΡΠΈΡΠ΅ΡΠ½ΡΠΌ
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Π½ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠ° Π ΠΎΡΡΠΈΠΈ Π½Π° 2014-2020 Π³ΠΎΠ΄ΡΒ»
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