摘要:

The memory behavior of an MNS capacitor caused by high voltage pulses is described. The instantaneous charge transfer during pulsing is measured and analyzed, and the results compared favorably with those from theC‐Vmeasurement. With this technique the charge transfer was found to be essentially insensitive to temperature up to 300°C. By means of step‐etch tests the stored charge was found to be located within 100 Å of the interface. Tunneling is believed to be the conduction mechanism.

ISSN:0003-6951    

DOI:10.1063/1.1651983

出版商:AIP    

年代:1968

数据来源: AIP

摘要:

Self‐locking of longitudinal cavity modes has been observed in a CO2&sngbnd;N2&sngbnd;He laser with an SF6absorber inside the cavity. Pulses as short as 20 nsec, with peak power in the range 104–105W, have been obtained. Pulse trains longer than 100 &mgr;sec have been observed. Operation is repetitive at millisecond intervals.

ISSN:0003-6951    

DOI:10.1063/1.1651984

出版商:AIP    

年代:1968

数据来源: AIP

摘要:

The application of an ellipsometer to the detection of oil or mercury contamination of surfaces in vacuum systems is discussed. Tables giving instrument readings for these contaminants on appropriate substrates illustrate the feasibility of the technique.

ISSN:0003-6951    

DOI:10.1063/1.1651985

出版商:AIP    

年代:1968

数据来源: AIP

摘要:

The diffusion of nickel into undoped and silver‐doped,p‐type lead selenide crystals exhibits anomalous behavior at 700°C. The penetration profiles show pronounced minima and these minima migrate into the crystal as a function of time. The minima occur when there is aptontransition in the initiallyp‐type crystals. The diffusion of nickel inton‐type, bismuth‐doped crystals does not exhibit a minimum in the penetration profile of nickel and the crystals do not exhibit anntoptransition.

ISSN:0003-6951    

DOI:10.1063/1.1651986

出版商:AIP    

年代:1968

数据来源: AIP

摘要:

When a very good planar Ge(Li) detector (3.8 cm2× 9 mm, ∼77°K, ∼1 kV/cm) was irradiated by a slit‐collimated137Cs &ggr;‐ray beam (slit width, ∼0.25 mm) incident parallel to then+‐iand thei‐pjunctions, a large and abrupt increase in the relative counting rate of slow rising pulses was observed near the two junctions. The slow pulses had much longer rise times (> 0.5 &mgr;sec) than those of the normal fast rising pulses whose rise times were determined by the transit times of the carriers.

ISSN:0003-6951    

DOI:10.1063/1.1651987

出版商:AIP    

年代:1968

数据来源: AIP

摘要:

Thin overgrowths of nickel were epitaxially formed by electrodeposition on substrate single crystals of copper having specific orientation and geometry. The prepared composite crystals were deformed in tension to small strains and found to have yield stresses significantly lower than for unplated copper crystals. Supported by evidence from replica‐electron microscopic examination of the surface slip structures, it is proposed that the elastic condition of the low interfacial misfit formed by the thin nickel overgrowth on copper promotes activation of surface dislocation sources.

ISSN:0003-6951    

DOI:10.1063/1.1651988

出版商:AIP    

年代:1968

数据来源: AIP

摘要:

An analytical treatment of the uniformly propagating acoustoelectric high‐field domain is presented in the limit of zero diffusion. Expressions for the electron density and the acoustic energy density as functions of the electric field are given. The domain velocity is determined.

ISSN:0003-6951    

DOI:10.1063/1.1651989

出版商:AIP    

年代:1968

数据来源: AIP

摘要:

Ultrashort pulses are observed in the output of a Pockel's cellQ‐switched, pulsed Nd:YAG laser. This result suggests that self‐locking effects occur in Nd:YAG lasers and that the output of such lasers may, in general, be composed of many picosecond pulses.

ISSN:0003-6951    

DOI:10.1063/1.1651990

出版商:AIP    

年代:1968

数据来源: AIP

摘要:

A model for superconducting Josephson junctions analogous to the driven simple pendulum with damping gives dcI‐Vcurves displaying hysteresis for light damping. Excess current and negative dynamic resistance can be obtained with heavy damping.

ISSN:0003-6951    

DOI:10.1063/1.1651991

出版商:AIP    

年代:1968

数据来源: AIP