Photoabsorption
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Photoluminescence, photoabsorption and photoemission studies of hydrazone thin film used as hole transporting material in OLEDS
A fotoluminescência de filmes finos de 1-(3-metilfenil)-1,2,3,4-tetrahidroquinolina-6-carboxialdeído-1,1’-difenilhidrazona foi monitorada em função da irradiação com luz UV. A intensidade da emissão decresce exponencialmente com o tempo de exposição, sugerindo degradação das amostras. Com o objetivo de investigar os mecanismos de degradação e
Publicado em: 2010
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2. Photoluminescence, photoabsorption and photoemission studies of hydrazone thin film used as hole transporting material in OLEDs
A fotoluminescência de filmes finos de 1-(3-metilfenil)-1,2,3,4-tetrahidroquinolina-6-carboxialdeído-1,1'-difenilhidrazona foi monitorada em função da irradiação com luz UV. A intensidade da emissão decresce exponencialmente com o tempo de exposição, sugerindo degradação das amostras. Com o objetivo de investigar os mecanismos de degradação e de
Journal of the Brazilian Chemical Society. Publicado em: 2008
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3. Fissility of actinide nuclei by 60-130 MeV photons
Nuclear fissilities obtained from recent photofission reaction cross section measurements carried out at Saskatchewan Accelerator Laboratory (Saskatoon, Canada) in the energy range 60-130 MeV for 232Th, 233U, 235U, 238U, and 237Np nuclei have been analysed in a systematic way. To this aim, a semiempirical approach has been developed based on the quasi-deuter
Brazilian Journal of Physics. Publicado em: 2006-12
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4. Photoabsorption and photoionization studies of the amino acid proline in the VUV region
Ionic fragmentation of the sublimated amino acid DL-proline has been studied using time-of-flight mass spectrometry and synchrotron radiation. Total ion yield and mass spectra were recorded in the 13 to 21.6 eV energy range. Partial ion yields have been calculated for the produced fragments and the results analyzed in a comparative way. Mass spectrum of prol
Brazilian Journal of Physics. Publicado em: 2005-12
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5. Analytical treatment for the deuteron-deuteron interaction
In the study of two interacting systems within the framework of microscopic theories, the correct treatment of the effective interaction between the fragments has been the most troubling problem, due to the technical difficulties in calculating the exchange terms. In the framework of the Generator Coordinate Method, and through a double projection technique,
Brazilian Journal of Physics. Publicado em: 2005-09
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6. Configuration interaction simulation of the NEXAFS photoabsorption spectrum of naphthalene
O espectro NEXAFS do naftaleno foi analisado sob a aproximação do estado final. Cálculos ROHF/SCF foram realizados para os estados localizados do caroço, segundo o procedimento de Bagus-Schaffer para cada canal de excitação. Cálculos CI foram realizados com excitações simples e duplas do carbono 1s para os dez orbitais virtuais de menor energia. As
Journal of the Brazilian Chemical Society. Publicado em: 2005-02
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7. Estado dos mecanismos de fotoabsorçao do 238U na região das ressonâncias nucleônicas / State of the mechanisms of the photoabsorption of 238U in the region nucleonic resonances.
Medimos a seção de choque de fotofissão do 238U entre 200 e 1200 MeV, utilizando um feixe de fótons monocromáticos formados a partir da radiação de Bremsstrahlung dos elétrons armazenados no síncrotron Adone, em Frascati (Itália). Verificamos que para este núcleo, nesta faixa de energias, as seções de choque de fotofissâo e de fotoabsorção po
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/11/1993
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8. Extended x-ray-absorption fine structure—Auger process for surface structure analysis: Theoretical considerations of a proposed experiment
A method for surface structure analysis is proposed. The proposed process combines x-ray photoabsorption and Auger electron emission. The extended x-ray-absorption fine structure, occurring for photon energies above an atomic absorption edge, contains structural information of the microscopic environment due to the coupling of the photoelectron final state w
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9. The complete optical spectrum of liquid water measured by inelastic x-ray scattering
Interaction of light with matter is of paramount importance in nature. The most fundamental property of a material in relation to light is its oscillator strength distribution, i.e., how strongly it absorbs light as a function of wavelength. Once the oscillator strength distribution is determined precisely for a wide enough energy range, the optical constant
National Academy of Sciences.