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Quantitative nondispersive cathodoluminescence (CL) measurements and dispersive CL experiments are performed at room temperature on n(+)-InP substrates as a function of the accelerating voltage (Eo). The results are explained in terms of band-to-band recom ...
In Al0.3Ga0.7As/GaAs quantum wells bordered by ultrathin (one or two monolayers) AlAs layers, the AlAs layer has been shown to provide a well for electrons at high pressure [Phys. Rev. B 45, 11 846 (1992)]. In this work, the same type of structures but gro ...
Absorption, emission and excitation spectra of NO in N2 and mixed N2/Kr matrixes at various N2 concns. have been recorded by means of tunable synchrotron radiation and ArF laser excitation. The gas-to-matrix shifts, bandwidths and Stokes shifts of the lowe ...
We investigated the interdiffusion of InGaAs/InP quantum wells (QWs) due to rapid thermal annealing (RTA) by photoluminescence (PL) spectroscopy and wedge transmission electron microscopy (WTEM). After RTA at temperatures between 650 and 900 degrees C (ann ...
Recent experiments on a 100 GHz quasioptical gyrotron have shown that for a large resonator setup [Phys. Fluids B 2, 1654 (1990)] the observed frequency up-shift between the starting current and a current of 10 A corresponds to a shift of 4-5 longitudinal ...
Cross-correlation between proton chem. shift anisotropy and proton-proton dipolar interactions is shown to be an important relaxation mechanism. Cross-correlation leads to a partial conversion of Zeeman order into longitudinal two-spin order. The build-up ...
The vibrational, rotational, and vibrational-rotational spectra of dil. H2, D2, and HD matrix-isolated in solid Kr and Xe were calcd. at zero temp. and at pressures P = 0-570 kbar. The impurity local mode frequencies were calcd. vs. pressure. The pure vibr ...
The frequency shifts from gas-phase values of the vibrational and rotational states of H2, D2, and HD mols. matrix isolated in solid Ar, Kr, and Xe were calcd. at zero temp. and at pressures 0 ? P ? 570 kbar. Also calcd. were the impurity local mode freque ...
The frequency shifts of the vibrational and rotational transitions of H2, D2, and HD mols. trapped in solid Ar are calcd. at zero temp. and at pressures 0 ? P ? 373 kbar. The pure vibrational and rotational-vibrational transition frequencies are strongly r ...
Selective IR vibrational predissocn. (IRVP) of van der Waals clusters in a free jet is an effective way to sep. isotopes. Abs. sepn. factors a in excess of 1.1 were obsd. upon irradn. of a beam of SF6 dild. in Ar with a 20 W CO2 laser. Selection of the wav ...
