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Mostrando documentos 31-40 de 466
Simulación por monte carlo de la función respuesta de detectores de radiación gamma.
(Universidad Nacional de Colombia, Bogotá, 2004)
La respuesta de un detector de radiación gamma cuando sobre él incide fotones X o gamma es física y matemáticamente muy compleja, ya que la eficiencia de captura de los fotones en cada uno de los procesos competitivos (los ...
Búsqueda del bosón de higgs del modelo estándar mediante decaimientos fermiónicos en colisionadores de fotones
(Universidad Nacional de Colombia, Bogotá, 2003)
Analizamos la producción de bosones de Higgs del modelo estándar en futuros colisionadores de fotones, tales como TESLA, CLIC y NLC, y su posile detección mediante decaimientos H - and gt; qq', donde q hace referencia a ...
On the difference between hermitian operators and self-adjoint operators
(Universidad Nacional de Colombia, Bogotá, 2013)
We explore the difference between the notions of hermitian and self-adjoint operator, illustrating with examples its relevance for the correct description of quantum systems.
Preliminares
(Universidad Nacional de Colombia, Bogotá, 2003)
Preliminares
Circuitos ópticos integrados y guía de ondas.
(Universidad Nacional de Colombia, Bogotá, 2003)
En el presente trabajo se dan a conocer los conceptos básicos del funcionamiento de un circuito óptico integrado (COI), haciendo especial referencia sobre la fibra óptica y la guía de ondas. De la fibra óptica se destacan ...
Structural characterization of volcanic ash of the nevado del ruiz: zeolite phase identification
(Universidad Nacional de Colombia, Bogotá, 2014-09-13)
This paper presents a study of the structural properties obtained from volcanic ash from Nevado del Ruiz located in the Central Range of Andes - Colombia. The volcanic ash samples were subjected to hydration processes and ...
Structural characterization on batio3/la2/3ca1/3mno3 bilayers deposited on nb:srtio3
(Universidad Nacional de Colombia, Bogotá, 2014-09-13)
In this work we have investigated structural properties of La2/3Ca1/3MnO3/BaTiO3 bilayers grown on Nb:SrTiO3 substrates. The films were deposited by pulsed laser deposition (PLD) technique at high-pressure oxygen atmosphere ...
Production and characterization of zeolite from fly ash by xrd
(Universidad Nacional de Colombia, Bogotá, 2014-09-13)
By classical alkaline hydrothermal process, Zeolites were synthesized from fly ashes coming from a thermo electrical power plant. This process consisted on the reaction between the ash’s inorganic oxides (primarily aluminum ...
Structural study of semiconductors for photovoltaic applications
(Universidad Nacional de Colombia, Bogotá, 2014-09-13)
We present a study of the structural properties of Bi2S3, SnS, SnS2, SnS:Bi, Cu3BiS3 and Cu(In,Ga)Se2 (CIGS) semiconductor compounds used as absorber layer in optoelectronic devices. The samples were grown by co-evaporation ...
Caracterization of thin films by x’pert-pro panalytical difractometer
(Universidad Nacional de Colombia, Bogotá, 2014-09-13)
In this work, the structural characterization of thin films using a conventional diffraction equipment, brand X'Pert PRO PANalytical X-rays is described. A brief review of the theoretical diffraction techniques and X-ray ...