977 resultados para fluctuating valence
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The intensities of the X and A valence photoelectron lines of N2 have been found to display Fano line shapes as a function of photon energy around the N 1s→ Rydberg excitations. The vibrational intensity distributions of these photoelectron lines change at the N 1s→3sσ and 3pπ resonances. These effects indicate interference between direct and resonant photoionization channels. Our numerical simulations reproduce quite well the experimental results.
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High-resolution monochromated electron energy loss spectroscopy (EELS) at subnanometric spatial resolution and <200 meV energy resolution has been used to assess the valence band properties of a distributed Bragg reflector multilayer heterostructure composed of InAlN lattice matched to GaN. This work thoroughly presents the collection of methods and computational tools put together for this task. Among these are zero-loss-peak subtraction and nonlinear fitting tools, and theoretical modeling of the electron scattering distribution. EELS analysis allows retrieval of a great amount of information: indium concentration in the InAlN layers is monitored through the local plasmon energy position and calculated using a bowing parameter version of Vegard Law. Also a dielectric characterization of the InAlN and GaN layers has been performed through Kramers-Kronig analysis of the Valence-EELS data, allowing band gap energy to be measured and an insight on the polytypism of the GaN layers.
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Inscripción en la parte superior: "France Militaire, f. 37"
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Resumen: Descripción: vista tomada desde la plaza del mercado con la Lonja a la derecha y la iglesia de los Santos Juanes a la izqda.
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Huella recortada
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Resumen: Descripción: vista tomada desde el plano del Real
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Resumen: Descripción: vista de Valencia tomada desde el plano del Real
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Resumen: Descripción: vista del interior del salón columnario de la Lonja
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Resumen: Descripción: vista de grupo pescadores en la costa
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Resumen: Descripción: vista de la ciudad de Valencia desde Burjassot
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Datos de publicación tomados de la obra a la que pertenece
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Datos de publicación tomados de la obra a la que pertenece
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Datos de publicación tomados de la obra a la que pertenece
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Estampado junto a "Vista de Valencia tomada del camino que conduce al Grao"