Now showing items 31-40 of 132
Molecular beam epitaxial growth and luminescence of InxGa1−xAs/InxAl1−xAs multiquantum wells on GaAs
(The American Institute of Physics, 1987-07-27)
This letter reports the successful molecular beam epitaxial growth of high‐quality InxGa1−xAs/InxAl1−xAs directly on GaAs. In situ observation of dynamic high‐energy electron diffraction oscillations during growth of ...
CT evaluation of the equivocal pulmonary nodule
(Elsevier, 1987)
In the setting of a questionable pulmonary nodule demonstrated by conventional radiographs, the place of CT in the diagnostic algorithm is not well established. We reviewed our experience in 50 consecutive patients referred ...
Inclusive [eta] production in [tau] decays
(Elsevier, 1987-10-22)
We have searched for inclusive [eta] production in [tau] decays using a data sample of 2553 events of e+e- -->[tau]+[tau]- in the one-three topology. The data were obtained using the High Resolution Spectrometer at ...
Large‐signal time‐domain modeling of low‐pressure rf glow discharges
(The American Institute of Physics, 1987-01-01)
Large‐signal time‐domain modeling (simulation) of rf glow discharges is a very useful and potentially accurate tool for the study of low‐pressure (50–500‐mT) gaseous electronics at high frequencies. Unfortunately, the ...
Isothermal extrusion of non-dilute fiber suspensions
(Elsevier, 1987)
The extrusion of a rod-like fiber suspension is a Newtonian solvent, as a first step to the fast and inexpensive production of composite materials, is investigated. The analysis is carried out by means of an integral ...
Dimensional expansions for two‐electron atoms
(The American Institute of Physics, 1987-02-15)
Approximate expansions in inverse powers of the dimensionality of space D are obtained for the ground‐state energies of two‐electron atoms. The method involves fitting polynomials in δ=1/D to accurate eigenvalues of the ...
New perspective on the U(n) Wigner-Racah calculus. I. Vector coherent state theory and construction of Gel'fand bases
(IOP Publishing Ltd, 1987-06-21)
Using a vector coherent state theory, it is shown that the construction of Gel'fand bases for the unitary group is particularly simple. The very specific rules for construction of the states greatly facilitate the subsequent ...
Transient thermocapillary flow in rectangular tanks with phase change
(Elsevier, 1987-05)
A numerical and experimental study is performed on transient natural convection in an insulated rectangular tank. The liquid is suddenly heated by a line source or cooled by a line sink being placed at the center of the ...
Measurement of 90Sr in reactor wastes by Cerenkov counting of 90Y
(Elsevier, 1987)
Determination of 90Sr in low-level radioactive wastes (LLW) from reactors is difficult because of the presence of so many other radionuclides in samples of interest. This problem was dealt with by radiochemical separation ...
A waveshifter light collector for a water Cherenkov detector
(Elsevier, 1987-11-15)
A device has been developed which is capable of doubling the light collection capability of a 5 inch hemispherical photomultiplier tube. Known as a "waveshifter plate", its geometry is adaptable to various applications. ...