Auslösung einer Gasentladung durch Aufprägung einer Potentialverzerrung

A gas-discharge system is described in which the transverse extension of a normal glow discharge is utilized to induce feedback-free triggering of a previously non-conducting discharge section. A calculation of the experimental configuration on the assumption that a field distortion penetrates from the active discharge into the activated section, thus lowering its ignition voltage, gives good agreement with the measured results. It is concluded that the basic principle of control could be applied to gas-discharge-like breakdown phenomena in solids, too.

     

Aufbau einer magnetischen Atomstrahlresonanz-apparatur

A magnetic atomic-beam-resonance-apparatus is described which is being used in connection with an ionisation-detector consisting of a mass-spectrometer with electron-bombardment ionizer. The total beam length is 127 cm. TheA-field has a length of 15 cm and a maximum inhomogeneity of ca. 36000 Gauß/cm; theB-field has a length of 40cm and a maximum inhomogeneity of ca. 16000 Gauß/cm; the (homogeneous)C-field has a length of 15 cm. All magnet-coils are mounted outside the vacuum-chamber. Adjustment is made by auxiliary obstacle-wires.     

Resonanzstreuung an einer Argon-Hochstrom-Niederdruckentladung

A resonance scattering experiment in an argon high-current low-pressure discharge is described. The saturation intensity has been measured for several discharge conditions and compared with a simple balance equation model for the transition 4p ²D_3/2 - 4_s ²P_3/2 of the argon ion.     

Direkte Konzentrationsabhängigkeit der Fluoreszenz einer Haupt- und einer Nebenlinie des Rubins

The concentration dependence of theR-lines of ruby shows three characteristic regions: The first has the expected linear increase of emission intensity with increasing concentration; the second shows a weaker increase than linear and is explained by the assumption, that energy is distributed more to nebenlines; the third shows a rapid decrease of the emission as is expected for quadrupole-quadrupole interaction between the active atoms. The emission of theN ₂-line of ruby increases nearly quadratically with increasing concentration and decreases in the third region as fast as theR-lines.     

Freie Schwingungen einer vierteiligen Membran

Zusammenfassung Es handelt sich um eine aus vier Rechtecken von verschiedenen Materialien bestehende Membran, die durch eine allgemeine Anfangserregung in freie Schwingungen versetzt wird. Die angewandte klassische Lösungsmethode läßt sich auf noch allgemeinere Fälle erweitern. Die theoretischen Ausführungen werden erstens am Beispiel einer homogenen Membran erklärt und zweitens auf eine durch einen Momentanimpuls zur Schwingung gebrachte vierteilige Membran angewendet.

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Zur Spinwellenstreuung an einer Schraubenversetzung

Within the Heisenberg model the scattering of spin waves by a dislocation can be calculated in the low energy limit, taking into account the structure of a simple cubic lattice. The differential cross section for the scattering by a screw dislocation is shown to have the same form as for the scattering by a step dislocation, if thes-wave-scattering caused by local disturbances is neglected.     

Betrachtungen zu einer vereinheitlichten Kerntheorie

In the beginning it is shortly reviewed how one can obtain in the frame of the Rayleigh-Schrödinger variational principle a unified structure and reaction theory which includes any kind of bombarding particles and reaction fragments. Then methods are discussed which allow to simplify the practical reaction calculations. Special emphasis is given to the question how in a natural way one can connect shellmodel- and cluster-calculations. Finally it is shortly mentioned how one can apply similar considerations to the atomic- and molecular-reactions.