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1.
Karel Toman 《Czechoslovak Journal of Physics》1959,9(3):367-376
On the basis of the correlation of diffraction data (intensity and width) of a precipitate with the intensity of reflection of a matrix solid solution it is shown that the change in primary extinction during the decomposition of a solid solution of Agin Alis caused by the precipitation of the phase Ag2Aland not by the production of lattice defects (zones, stacking faults).
Reported in part at the VIth Scientific Technical Conference on the Application of X-rays held in Leningrad in 1958.
The author thanks M. Mikovský for preparing the single crystals of the alloy Al-Ag having a high primary extinction and J. Laek and Prof. J. Bedná for carefully checking their homogeneity and chemical composition. 相似文献
I. Al-Ag
( ) , Ag Al Ag2Al, ( , ).
Reported in part at the VIth Scientific Technical Conference on the Application of X-rays held in Leningrad in 1958.
The author thanks M. Mikovský for preparing the single crystals of the alloy Al-Ag having a high primary extinction and J. Laek and Prof. J. Bedná for carefully checking their homogeneity and chemical composition. 相似文献
2.
Eubomír Hrivnák 《Czechoslovak Journal of Physics》1959,9(4):439-445
Zusammenfassung In der vorliegenden Arbeit wird die Formel für die potentielle Energie der Wechselwirkung von Elektron und Loch im Ionenkristall abgeleitet und diskutiert, sofern deren Interaktion mit den optischen Gitterschwingungen in Betracht gezogen wird.
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3.
Egon F. Holländer 《Czechoslovak Journal of Physics》1959,9(2):229-236
The self-regulation of an inert gas shielded metal welding arc is dealt with briefly. A thermodynamic equation is derived for the self-regulation of such an arc.
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4.
Karel Wotruba 《Czechoslovak Journal of Physics》1955,5(1):102-103
5.
Jiří Teichman 《Czechoslovak Journal of Physics》1959,9(1):47-66
. , . . , .
The influence of fringing on betatron oscillations in an accelerator with a sectioned magnet. I
A study is made of betatron oscillations in stray fields at the edges of magnets of an accelerator having a small radius. Two approximations of the course of stray fields, chosen on the basis of measurements, help in the construction of non-linear equations of motion of the particle. Transformation matrices of the boundary regions are derived. The case when an equilibrium trajectory encloses a general angle with the edge of the magnet is also treated.相似文献
6.
Václav Střelka 《Czechoslovak Journal of Physics》1958,8(3):377-378
7.
Miroslav Trlifaj 《Czechoslovak Journal of Physics》1959,9(1):4-15
A study is made of the non-radiative transfer and diffusion of excitation energy in molecular crystals containing foreign molecules and its influence on the luminescent properties of these crystals.
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8.
The dependence of the critical resolved shear stress of zinc single crystals on the impurity content and the dislocation density is observed. It is shown that the effect of impurities on the critical resolved shear stress is indirect.
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9.
L'ubomír Hrivnák 《Czechoslovak Journal of Physics》1959,9(6):685-691
An approximate solution is given of the Schrödinger equation for S-states of an electron in the field of a hole, when the potential energy of the electron has the form — e2/r [1+exp (–qr].
s- , –e2/r [1+exp (–qr].相似文献
10.
P. Kratochvíl 《Czechoslovak Journal of Physics》1960,10(12):927-930
The applicability of Tiller's considerations on the production of dislocations is proved. The density of dislocations appearing during impurity microsegregation increases with increasing rate of growth as a consequence of the corresponding change in the effective distribution coefficient. The real value of C at the microsegregation boundaries is at least twice as great as the average value of the concentration of impurities in the crystal in question.
. , , . C , .相似文献
11.
M. Matyáš 《Czechoslovak Journal of Physics》1962,12(11):838-842
Zusammenfassung Auf Grund einer einfachen Vorstellung wird gezeigt, wie sich mit Hilfe der magnetischen Suszeptibilität bei halbleitenden Verbindungen von Sphaleritstruktur die Abweichung von der idealen Kovalenzbindung vergleichen läßt und wie man die Messung der magnetischen Suszeptibilität zur Abschätzung der Energie des verbotenen Bandes und umgekehrt verwenden kann. Gleichzeitig werden die bei Zimmertemperatur bestimmten Werte der molaren Suszeptibilität der Verbindungen ZnSe, CdTe, CuBr, AgI, CdS und ZnS angegeben.
Der Autor ist Frau Dr. N. A. Gorjunova (Physikalisch-technisches Institut, Leningrad) und Herrn Dr. E. Klier (Mathematisch-physikalische Fakultät, Prag) für die Verleihung der Proben und Herrn P. Jansa (Institut für Festkörperphysik, Prag) für die Hilfe bei der Messung zu Dank verpflichtet. 相似文献
, . ZnSe, CdTe, CuBr, AgI, CdS ZnS .
Der Autor ist Frau Dr. N. A. Gorjunova (Physikalisch-technisches Institut, Leningrad) und Herrn Dr. E. Klier (Mathematisch-physikalische Fakultät, Prag) für die Verleihung der Proben und Herrn P. Jansa (Institut für Festkörperphysik, Prag) für die Hilfe bei der Messung zu Dank verpflichtet. 相似文献
12.
B. Rothenstein 《Czechoslovak Journal of Physics》1959,9(2):215-220
Zusammenfassung Unter der Voraussetzung, daß das Ahtivierungsfeld für die reversible Bewegung der Blochschen Wände dem Maxwellschen Verteilungsgesetz unterliegt, wird die Entstehung des Maximums der inneren Reibung im Wechselfeld theoretisch erläutert. Weiter wird die Lösung der Differenzialgleichung für die Bewegung einer Blochschen Wand bei gleichzeitiger Wirkung des Wechselfeldes und der Torsionsbeanspruchung gegeben. Die Messung bei einigen Torsionsfrequenzen ermöglicht die Bestimmung gewisser mikroskopischer Konstanten.
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13.
Zusammenfassung Im nachstehenden Artikel werden mikrophysikalische Vorgänge behandelt, die das Auftreten schneller Schichtungswellen in Neonglimmentladungen veranlassen können. Es werden sowohl die qualitativen Abhängigkeiten, als auch die ziffernmäigen Werte der Parameter der Schichtungswellen mit den charakteristischen Gröenwerten der in diesem Entladungstypus vor sich gehenden Vorgänge verglichen. Auf Grund der vorgenommenen Vergleiche kann gesagt werden, da die Relaxationszeiten der schnellen Wellen durch die Diffusionslebensdauer der atomaren, bzw. molekularen Ionen gegeben sind.
Zum Schlu danken wir F. Kroupa und V. Krejí für die aufmerksame Lesung der Arbeit und wertvolle Hinweise. 相似文献
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Zum Schlu danken wir F. Kroupa und V. Krejí für die aufmerksame Lesung der Arbeit und wertvolle Hinweise. 相似文献
14.
Miroslav Trlifaj 《Czechoslovak Journal of Physics》1959,9(4):446-459
Zusammenfassung Es wird der Prozeß der Vernichtung von Exzitonen an Vakanzen und Zentren des F-Typs in Ionenkristallen studiert, der vom Entstehen eines Zentrums neuen Typs und der Stromträger begleitet ist. Es werden die allgemeinen Ausdrücke für die betreffenden Wirkungsquerschnitte in quasiklassischer Annäherung abgeleitet und diskutiert.
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F- , . .相似文献
15.
M. Polcarová 《Czechoslovak Journal of Physics》1962,12(1):60-76
The misorientation of blocks in the surface layer of an Fe-Si single crystal deformed by engraving with a sapphire needle or by rolling of a steel ball is followed by the method of the measurement of rocking curves. The rocking curves are followed in dependence on the direction in the surface plane and on the load when deformed. Further on the influence of the penetration of radiation on the rocking curve is studied, if the misorientation of blocks changes with the growing depth under the surface and an equation for the distribution of orientations on the basis of the measured rocking curves is derived. The distribution of orientations in two directions on the surface plane and at several depths under the surface was calculated for one case of the engraved specimen.
Fe-Si
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16.
J. Brož 《Czechoslovak Journal of Physics》1960,10(6):428-438
A model of the distribution of cations and valencies in non-stoichiometric magnesium manganese ferrites was proposed and its validity verified by measuring the saturation magnetic moments. The results of measuring the moment in stoichiometric ferrites to a certain extent confirms the correctness of the proposed model for this type of magnesium manganese ferrites, too. In a discussion of the distribution coefficient for manganese ions the close connection between this coefficient and the average valency of the manganese was pointed out. The question of the dependence of the distribution coefficient of magnesium ions on the composition is solved by introducing the maximum values of this coefficient and assuming that a simple proportionality holds for all compositions between the actual value of this coefficient and its maximum value.
In conclusion the author thanks Dr. S. Krupika and K. Závta for valuable discussions. 相似文献
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In conclusion the author thanks Dr. S. Krupika and K. Závta for valuable discussions. 相似文献
17.
The diffusion length, diffusion coefficient and mean life time of thermal neutrons in rigid, Czechoslovak made, diphenyl were measured by the impulse method at the temperature 20°C. The experimental results are discussed.
We thank J. Jadavan and the accelerator group for their co-operation. 相似文献
, ( ) 20°C. .
We thank J. Jadavan and the accelerator group for their co-operation. 相似文献
18.
The paper contains further results of studying dislocations rendered visible by anodic dissolving on the surface of single crystals of alpha-iron. The influence of the crystallographic orientation of the surface is investigated, the effect of carbon is confirmed and the anodic process is studied. The mechanism of dissolving of the crystal is given and a new more suitable method of rendering dislocations visible is derived.
The author thanks F. Kroupa and J. Hejduk for critical remarks and discussion. 相似文献
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The author thanks F. Kroupa and J. Hejduk for critical remarks and discussion. 相似文献
19.
Ladislav Kopecký 《Czechoslovak Journal of Physics》1955,5(2):283-285
20.
J. Hladký P. Chaloupka V. Kadečka T. Kowalski P. Mokrý 《Czechoslovak Journal of Physics》1959,9(4):432-438
The time courses are given of three variations in the intensity of cosmic radiation, which occurred in the first half of 1958. The measuring apparatus is described and the energies of the particles recorded a reestimated. The paper is the partial result of systematic measurements of the intensity of cosmic radiation carried out in Czechoslovakia in the International Geophysical Year.
The authors heartily thank the Institute of Geomagnetism in Krasnaja Pachra, near Moscow, and especially its director, Prof. M. B. Pukov, and Dr Ju. M. Kopylov for the neutron counters.The authors wish to thank Prof. V. Petrílka, corresponding member of the Czechoslovak Academy of Sciences, and Prof. L. Jurkiewicz, from the Academy of Mining and Heavy Industry in Cracow for help in the work and Academician J. Novák, who made possible the numerical evaluation of the data in the Mathematical Institute of the Czechoslovak Academy of Sciences. Especial thanks go to F. Pilát and B. Slavík for their great help in setting up the apparatus and to all colleagues who took part in the measurements. 相似文献
1958
, 1958 . . , .
The authors heartily thank the Institute of Geomagnetism in Krasnaja Pachra, near Moscow, and especially its director, Prof. M. B. Pukov, and Dr Ju. M. Kopylov for the neutron counters.The authors wish to thank Prof. V. Petrílka, corresponding member of the Czechoslovak Academy of Sciences, and Prof. L. Jurkiewicz, from the Academy of Mining and Heavy Industry in Cracow for help in the work and Academician J. Novák, who made possible the numerical evaluation of the data in the Mathematical Institute of the Czechoslovak Academy of Sciences. Especial thanks go to F. Pilát and B. Slavík for their great help in setting up the apparatus and to all colleagues who took part in the measurements. 相似文献