Now showing items 3681-3690 of 3696
Tests of a large air‐core superconducting solenoid as a nuclear‐reaction‐product spectrometer
(The American Institute of Physics, 1987-09)
An air‐core superconducting solenoid, with a diameter of 0.2 m and a length of 0.4 m, has been configured for use as a heavy‐ion reaction‐product spectrometer (E/A≤5 MeV/u) near θ=0 °. The spectrometer has a large solid ...
Instability of Three‐Layer Viscous Stratified Flow
(The American Institute of Physics, 1969-12)
Instability of plane Couette flow of three superposed layers of fluids of different viscosity between two horizontal planes is investigated. It is found that there are two modes of disturbance dominated, respectively, by ...
Hyperfine structure in the red emission system of NbN
(The American Institute of Physics, 1975-10-01)
A detailed study of hyperfine structure observed in the 0,0 band of the 3Φ (aβ) →3Δ (aβ) system of NbN has shown that the secondary hyperfine effects observed in this structure are not due to a perturbation in the 3Δ state ...
Nonrandom alloying in In0.52Al0.48As/InP grown by molecular beam epitaxy
(The American Institute of Physics, 1987-03-09)
Anomalous behavior in Hall data of molecular beam epitaxial In0.52Al0.48As/InP for T≥400 K suggests the presence of alloy clustering. The relaxation time for alloy clustering has been determined and analysis of measured ...
Electric field effects on intersubband transitions in quantum well structures
(Elsevier, 1987)
We report on a Raman scattering study of the electric-field dependence of c0 --> c1 intersubband transitions of electrons in a 264 A GaAs- Al0.3Ga0.7As quantum-well structure. The measured Stark shifts are in very good ...
New supersymmetric solutions of N = 2, D = 5 gauged supergravity with hyperscalars
(IOP Publishing Ltd, 2007-10-01)
We construct new supersymmetric solutions, including AdS bubbles, in an N = 2 truncation of five-dimensional N = 8 gauged supergravity. This particular truncation is given by N = 2 gauged supergravity coupled to two ...
A characteristic study of the superconducting phase in the niobium‐aluminum‐germanium system
(The American Institute of Physics, 1984-09-15)
A study has been made of the time and temperature dependence of the growth of the superconducting A‐15 phase and its grains in the Nb‐Al‐Ge system. In addition, changes in the microstructure and composition of the A‐15 ...
Low defect densities in molecular beam epitaxial GaAs achieved by isoelectronic In doping
(The American Institute of Physics, 1986-08-25)
We have studied the effects of adding small amounts of In (0.2–1.2%) to GaAs grown by molecular beam epitaxy. The density of four electron traps decreases in concentration by an order of magnitude, and the peak intensities ...
Photoluminescence and electro‐optic properties of small (25–35 nm diameter) quantum boxes
(The American Institute of Physics, 1993-05-31)
The luminescence and electro‐optic properties of buried 25–35 nm quantum boxes have been measured. The quantum boxes were defined by a combination of molecular beam epitaxial growth and regrowth, electron beam lithography, ...
Erratum: Matrix Elements for Configuration d4d4 in a Weak Octahedral Field Using Racah Methods
(The American Institute of Physics, 1970-09-01)