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111.
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A. Corella‐Madueo R. A. Rosas J. L. Marín R. Riera 《International journal of quantum chemistry》2000,77(2):509-515
The direct variational method is used to estimate some interesting physical properties of the He atom and the Li+ ion confined within impenetrable spheroidal boxes. A comparative investigation of the ground‐state energy, pressure, polarizability, dipole, and quadrupole moments with those of the He atom inside boxes with paraboloidal walls is made. The overall results show a similar qualitative behavior. However, for Li+ there are quantitative differences on such properties due to its major nuclear charge, as expected. The trial wave function is constructed as a product of two hydrogenic wave functions adapted to the geometry of the confining boxes. © 2000 John Wiley & Sons, Inc. Int J Quant Chem 77: 509–515, 2000 相似文献
113.
Jorge Barreto Mariano Perlvarez Jose Antonio Rodríguez Alfredo Morales Montse Riera Manel Lpez Blas Garrido Laura Lechuga Carlos Dominguez 《Physica E: Low-dimensional Systems and Nanostructures》2007,38(1-2):193
Fully compatible CMOS capacitive devices have been developed in order to obtain electrically stimulated luminescence. By high-temperature annealing in N2 atmosphere PECVD non-stoichiometric silica layers, silicon nanocrystals were formed. Photoluminescence, as well as structural studies, were carried out on these layers to decide the best material composition, which lies next to 17% of silicon excess. Under pulsed electrical stimulation, devices show sharp, narrow, less than 5 μs and pulse-frequency-independent, luminescence peaks at the end of the stimulation pulse. Current analysis on those capacities show hole injection at the beginning and electron injection at the end of the stimulation pulses. It is seen that no positive pulses are needed for attaining bipolar charge injection. Electroluminescence is detected when biasing with negative pulses at about 15 V and increasing up to 50 V. The electroluminescence spectrum matches photoluminescence one, allowing assigning both luminescent radiation to the same emission mechanism, that is, electron–hole recombination within the silicon nanocrystals. 相似文献
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J. L. Dormann A. Malats i Riera G. Pourroy P. Poix J. Jové P. Renaudin 《Hyperfine Interactions》1994,94(1):1995-1998
Several samples of a new metal-ferrrite composite made up of Fe-Co alloy and mixed Fe-Co ferrite have been studied by Mössbauer spectroscopy with and without applied field. The general chemical formulas have been established and the non-collinear magnetic structure has been evidenced at low temperature due to anisotropic Fe2+ and Co2+ ions. 相似文献
116.
We present a unified theoretical basis of the recently proposed regularization method of absorber or doorway states. The theory is applicable to the close-coupling solutions of time-dependent Schrödinger equations corresponding to Hamiltonians containing singular terms and with a partial continuum spectrum. The presentation and illustrations are restricted to the treatment of atomic collisions.Dedicated to Prof. Werner Sandhas on the occasion of his 60th birthday 相似文献
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Ion L Morales D Nieto S Pérez J Riera L Riera V Miguel D Kowenicki RA McPartlin M 《Inorganic chemistry》2007,46(7):2846-2853
Compounds [Mo(CO)4(N-N)] (N-N = 4,4'-bis((4-methylphenyl)carbamoyl)-2,2'-bipyridine, bipy', 1; or 2,2'-biimidazole, H2biim, 2), [MoCl(eta3-methallyl)(CO)2(N-N)] (N-N = bipy', 3; H2biim, 4), and [Mo(eta3-methallyl)(CNtBu)(CO2)(N-N)]BAr'4 (Ar' = 3,5-bis(trifluoromethyl)phenyl; N-N= bipy', 5; H2biim, 6) were synthesized and characterized, and their behavior toward anions was investigated in solution (IR and 1H NMR) and in solid state (X-ray diffraction). 相似文献