Showing papers in "Physica D: Nonlinear Phenomena in 1934"

TL;DR: In this paper, Fock's Naherungsmethode zur Behandung des quantenmechanischen Mehrelektronenproblems aufgestellten Gleichungen werden auf etwas allgemeinerer Grundlage diskutiert.

TL;DR: In this paper, the process of transition of the cubic-body-centred modification into the hexagonal-close-packed modification of zirconium can be described by means of a combination of shearing- and dilatation-processes parallel to definite crystallographic directions.

TL;DR: In this paper, ausammenfassung auf Grundlage der A b b eschen Beugungstheorie der optischen Abbildung wird das Aussehen eines Hohlspiegels mit willkurlich verlaufenden kleinen Abweichungen beim Foucaul tschen Schneidenverfahren and beim neuen Phasenkontrastverfhren berechnet.

TL;DR: In this article, the wahrscheinliche Schwingungsverteilung in einer von einer Lichtquelle entweder direkt oder mittels einer Linse beleuchteten Ebene untersucht.

TL;DR: In this paper, it was shown that it is impossible to apply Matthiesen's rule for these resistances, and that the ideal resistance curve of the gold wires measured (not very pure) has a minimum.

TL;DR: In this paper, a phenomenological treatment of supraconductivity based on the fundamental laws of thermodynamics and on the assumption that the magnetic induction inside a suplaconductive body is zero is given.

TL;DR: In this article, a benutzte Neon wurde von den letzten Spuren von anderen Gasen durch eine der folgenden Methoden gereinigt: A) eine Bogenentladung mit Ca-Kathode (0,5 A); B) a starke Glimmentladung with Mischmetall Kathode(0,2 A); C) a schwache Glimmenladungwith positiver Saule (einige mA).

TL;DR: In this paper, the authors show that in the gewohnlichen Lichtbogen the Zusammenstosse zwischen Atomen and Molekulen untereinander weitaus the wichtigste Ursache fur the Entstehung and Vernichtung angeregter Teilchen sind, wahrend die Zusammmenstose der Teilmen with Elektronen and Ionen and die Emission and Absorption of Strahlung dabei eine ganz un

TL;DR: In this paper, the lattice constant of solid CO2 has been measured at different temperatures between 20 and 114°K and the results, in Angstroms, can be represented by the formula a0 = 5.540 + 4.68.

TL;DR: In this paper, a description of the apparatus used for obtaining very low temperatures by the method of adiabatic demagnetisation is given, and the method is discussed.

TL;DR: In this article, Druyvesteyn et al. investigated the Ionisierung des Argons bei der bewegung of Elektronen durch Neon with ein wenig Argon (V g der Glimmentladung (ungefahr = die Zundspannung V c der Koronaentladung) berechnet werden.

TL;DR: In this article, a photoelektrische Kathode rotund infrarot-empfindlich ist and die fluoreszierende Anode sichtbares (grunes o or blaues) Licht aussendet.

TL;DR: In this paper, the contraction of the discharge and the absolute value of the lightintensity were calculated for a given voltage gradient, by making use of the ionisation formula of S a h a and the mobility equation of L a n g e v i n.

TL;DR: The crystal structure of carbon dioxide was investigated to a greater accuracy than till yet as discussed by the authors, and the lattice constant was found to be 5.575 ± 0.005 A at −190 °C.

TL;DR: In this paper, the electrical resistance of very pure platinum has been investigated at very low temperatures and it was found that it is impossible to represent the experimental data by a simple formula [R / R 0°C· ] = AT B [Houston [ R/ R 0] = AT 2 Bloch, Peierls, [ R / R 5 ] =AT 5 ], nor does the more complicated formula of Vonsovsky and Smirnov ([R/ R 1°C · ] = C 1 T 5 + C 2 T 4 + C 3 T 3

TL;DR: In this article, the theory of the fine structure of X-ray absorption bands in molecular gases is applied to the K-absorption of Ge in GeCl4, and the atomic wave functions and atomic field of the neutral Cl-atom are computed by the method of the self-consistent field.

TL;DR: In this paper, a derivation of the equation (d H d T 0 ) 2 = 4 π d (c ) ) T 0 is given, where c is the number of nodes in the graph.

TL;DR: In this article, the specific heat of thallium was measured with a magnetic field 0, while persistent currents were flowing, and the results showed that at a definite temperature the difference cs-cn changes sign, which is in accordance with Nernst's theorem.

TL;DR: In this paper, the ratio e/mc of magnetic moment and angular momentum of the electronic spin can be derived without referring to a detailed classical model of the constitution of the electron, which leads to a simple classical derivation of the Thomas factor.

TL;DR: In this paper, experiments were carried out to see whether the rapid descent of the TC -⅓, T -curve below 5°K is connected with adsorption of a layer of helium at the surface of the metal, by measuring the beat capacity of 1.

TL;DR: In this paper, a discharge tube (inner diameter 20 mm) is filled with a known quantity of mercury, so that for an input of 43,8 Watt (A.C.) pro cm length, the pressure is just one atmosphere.

TL;DR: Weizsacker et al. as discussed by the authors show that for kleinen Energieen ist sie noch um einen Faktor (k 0/mc2)2 (k0 = Primarenergie) kleiner.

TL;DR: In this article, the atomic heat of thallium was measured from 1.3 to 4.2° K. at the transition point, which is consistent with Rutgers' equation.

TL;DR: In this article, the thermal properties of liquid helium are described by means of two diagrams which represent p (pressure) or ϱ (density) as functions of T (temperature).

TL;DR: In this article, the distribution functions of velocity and displacement in the Brownian motion of a free and a harmonically bound particle are derived by integration of the equation of Langevin and the results are extended so as to include the influence of an external force, dependent on the time.

TL;DR: In this paper, the specific heat of a non-supraconductor shows a supplementary heat capacity due to the F e r m i-gas of the free electrons, and the curve of the threshold values is a parabola (H = − aT2 + b).