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The transit of excess holes through 25‐μm Teflon films has been observed. The holes are generated by electron‐pulse ionization in the near‐surface region of the samples. From the transit time we determine a mobility of 2×10 −9 cm 2 /V s, independent of field, carrier density,...
The time and space development of the x‐ray emission from the irradiated target surface and the implosion core in laser‐compressed glass microballoons is recorded by x‐ray streak photography. The experimental variation of implosion time with target mass and laser energy is considered and...
Growth of In 1− x Ga x As y P 1− y quaternaries on InP (100) substrates was obtained over the whole band‐gap range 0.75–1.35 eV. Growth conditions and gas flow ratios are described for an open tube VPE of these quaternaries.
Sustained oscillations in proton‐bombardment‐delineated stripe‐geometry (Al,Ga)As double‐heterostructure injection lasers are shown to be adversely influenced (enhanced) by the presence of dc current bias in the devices. The time constant for this enhancement is found to be in the range...
Using Auger electron spectroscopy, the region near the front contact of cuprous oxide front‐wall solar cells was investigated. In cells showing large photovoltages, a maximum of the copper concentration being by about 4 at.% percent higher than the bulk concentration was observed at a distance...
By a new activation method, namely, activation by Cs, Sb, and O 2 , stabilized cold cathodes could be obtained, and continuous operation over 3000 h has been achieved with a GaP‐GaAlP cold cathode. It is found that a major source of rapid efficiency loss of the cold cathode is the loss of Cs...
An oblique shadow deposition technique for altering the profile of grating relief patterns on surfaces is described. The technique essentially represents a method whereby a series of grating masks may be superimposed in precise registration with each other. By appropriate choice of deposition...
High‐current ion beams in the 10–20‐keV range are extracted from a moving plasma. Current densities up to 2.5 A/cm 2 are obtained at the plasma boundary, which is almost an order of magnitude larger than the Bohm current. Total currents of over 100 A are obtained from the plasma. Simple...
Cross sections for the ionization of the metastable excimers Ne∗ 2 ( 1,3 Σ + u ) and Ar∗ 2 ( 1,3 Σ + u ) by electron impact are calculated in the binary‐encounter approximation for collision energies E (eV) in the range 5⩽ E ⩽50 eV. They have maximum values ∼10 −15 cm 2 and are...
Starting at room temperature the Hall constant of In‐doped lead tin telluride increases exponentially with inverse temperature, then decreases, and finally flattens out. This behavior is explained on the basis of autocompensation and the positive temperature dependence of the band gap.
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