Die Oberflächenbehandlung der Einkristalle der halbleitenden Verbindung CdSb

Ohne Zusammenfassung

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CdSb

     

Amplitude and energy coefficients of reflected and refracted light

The tensor of reflected and refracted light was first introduced into the principal axes and then the latter were transformed into thep ands direction of the electric field strength. The amplitude coefficient of thep-components of refracted light has different forms depending on which complex unit vector is unit with respect to the square or the absolute value. The energy coefficient has the same value in both cases.

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, p s . p- , . .

     

Die Konferenz über optik und Spektroskopie aller wellenlängen in der DDR

Ohne Zusammenfassung

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Bestätigung der Hertzschen Theorie mittels eine indirekte Methode

Ohne Zusammenfassung

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Der Einfluss der positiven Ionen auf die Exoelektronenemission

Zusammenfassung Es werden die Ergebnisse der Messung des Einflusses der auf den Emitter bei der Messung der Exoelektronenemission mittels Geiger-Müller-ZÄhlers auffallenden positiven Ionen beschrieben und die möglichen Mechanismen der Beeinflussung der Emission diskutiert.

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, -. , .

     

Determination op energy gap width in some semi-conductors

The formula derived by the author for the width of the energy gap is compared with experiment for GaSb, InAs, InSb, and InSb. GaSb semi-conductors. The agreement is good.

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GaSb, InAs, InSb, InSb. GaSb. o.

     

The conversion electron spectra of Lu169 and Lu170

The isotopes Lu¹⁶⁹ and Lu¹⁷⁰, obtained in the fraction of radioactive Lu isotopes by bombarding a Ta target with fast protons, were measured on a double focusing -ray spectrometer. The gamma transitions are given together with the relative intensities of the conversion lines. The multipolarity of the transition is determined for some gamma transitions from the internal conversion coefficient ratios of theK andL shells.

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Lu¹⁶⁹ Lu¹⁷⁰

Lu¹⁶⁹ Lu¹⁷⁰, . - . - K L .

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We should like to thank V. Kopiva and M. Buriánek for help during the measurements.     

Der Einfluss verschiedener Beimischungen auf die Entstehung der Leinen und Baumstruktur in der Glimmentladung in der Atmosphere Luft-Quecksilberdampf

Ohne Zusammenfassung

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—

     

RÄumliche Darstellung der Atomverteilung im Kristallgitter aus einer beschrÄnkten Anzahl von Röntgendiffraktionsdaten

Zusammenfassung Aus den Projektionen der Elektronendichten in drei voneinander unabhÄngigen kristallographischen Ebenen wird die Funktion (2) zusammengesetzt, die das übliche Darstellungsverfahren mit Hilfe der dreidimensionalen Fourierreihe ersetzt.

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(2), .

     

Anmerkung zur Lösung der Temperaturänderung in der Positiven Säule

Ohne Zusammenfassung

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Eine neue Methode zur Messung des absoluten Reflexionsvermögens mit Doppelstrahlspektrometern

Ohne Zusammenfassung

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Bemerkung über die Reziprozität beim Durchgang des Lichtes Durch Leitfähige Schichten

Zusammenfassung Im vorliegenden Artikel wird die Durchlässigkeit eines beliebigen Systems homogener oder inhomogener Schichten mit beliebiger Leitfähigkeit bei senkrechtem Einfall einer elektromagnetischen Welle untersucht. Es wird bewiesen, da\ das Verhältnis der Durch-lässigkeiten beim Auftreffen der Welle von der einen und von der anderen Seite lediglich von den Leitfähigkeiten der Medien auf beiden Seiten des Systems abhängt. Falls die Leitfähigkeiten beider Medien gleich sind, sind auch die Durchlässigkeiten in beiden Richtungen gleich.

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. , . , .

     

The elastic coupling between longitudinal and transversal vibrations оf isotropic rods II. Rods of circular cross-section

The new approximative method for calculating the frequencies of longitudinal vibrations of isotropic homogeneous rods described in part I. is used for rods of circular crosssection. Similarly to the rods of rectangular cross-section there does not exist any dead zone of frequencies.

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II.

, I. (. . 366), . , , .

     

To the question of electron angular distribution at Μ-meson decay

The paper describes the measurement of the angular distribution of electrons at the decay of-mesons in a longitudinal magnetic field. The results of measurement indicate that electrons are emitted with preference not only in the direction parallel to the spin orientation of -meson but also in the antiparallel direction in disagreement with the angular distribution predicted by theory.

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- . , -, , , .

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The authors thank N. V. Rabin for irradiating the nuclear emulsions, Prof. Dr. V. Petrílka and M. Suk for mediating relations with the Joint Institute of Nuclear Research in Dubna and Dr. J. Pernegr for valuable discussions and remarks. Thanks also go to H. Koutová and H. Slámová for carefully scanning the nuclear emulsions.     

Colour centre in BaTiO3 single crystals

The position of the absorption band of a colour centre formed by one electron trapped on an oxygen vacancy, in a cubic modification of BaTiO₃ single crystals, is quantum mechanically calculated.

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BaTiO₃

- , , , BaTiO₃.

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In conclusion the author thanks Dr. M. Trlifaj, corresponding member of the Czechoslovak Academy of Sciences, for valuable suggestions and remarks. He also thanks Dr. H. Arend, B. Bezina, C. Sc., P. Coufová and V. Janovec, C. Sc., of the Institute of Physics, Czechoslovak Academy of Sciences, for helpful discussions.     

Fremdanregung Schneller Laufender Schichten in Neon Durch Ein Hochfrequenzfeld

Ohne Zusammenfassung

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Ne

     

The influence of plastic deformation on the magnetostriction constant of iron-nickel alloys

The magnetostriction constant of three iron-nickel alloys and one Fe-Ni-Co alloy was measured as a function of the plastic elongation up to about 25%. The magnetostriction constant decreases with deformation in all materials. In Fe-Ni-Co alloy the volume magnetostriction also decreases. The influence of crystallographic texture is discussed and it is shown that it is not a decisive factor. The observed decrease is explained by assuming the influence of lattice deformation on spin-orbital interaction.

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- Fe-Ni-Co 25%. . Fe-Ni-Co . , . .

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In conclusion the authors thank Z. Málek and S. Libovický for carefully reading this paper and for remarks, J. Míová for help in the measurements, J. Cáslavský for X-ray determination of the texture and members of the chemical department of the Institute of Physics for thermal treatment and analysis of the samples.     

A possible test of quantum electrodynamics by means of polarization effects in electron-nucleon scattering

The differential cross-section is given for the electromagnetic scattering of polarized relativistic electrons on polarized nucleons. The finite size of each particle is taken into account by means of two form-factors. The effect of the possible non-punctiform structure of the electron on the polarization effects in scattering is discussed. It is shown that the internal structure of the anomalous magnetic moment of the electron would show itself in the cross-section by terms depending on the transversal polarization of the incident electrons.

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. . . , , .

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Summary of results of a diploma-thesis for the degree of graduate physicist.

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In conclusion the author wishes to express his sincere gratitude to prof. V. Votruba and J. Kvasnica for suggesting this problem, for helpful discussions and valuable advice.     

Plasma oscillations and dynamical friction

The forceF of mutual interaction of two species of charged particles in relative motion with velocityU is, forU higher than the mean thermal velocities of particles, a decreasing function ofU. This property ofF(U) can give rise to the excitation of electrostatic oscillations.

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F, copta , U, U, , , U. F(U) .