Atomic And Molecular Physics
Mostrando 1-7 de 7 artigos, teses e dissertações.
-
1. Acoplamento de dois feixes com lasers de femtossegundos em vapor de Rb
Femtosecond lasers operating in the mode-locked regime have a repetition rate determined by the round trip time of the pulse inside the laser cavity (TR = 2L/c). For Ti:sapphire lasers the repetition rate is typically of the order of 100 MHz, with TR 10 ns. Under this condition TR may be smaller then the population relaxation time (T1) and the coher
Publicado em: 2007
-
2. MBE growth and characterization of films SnTe layers and SnTe/Sn1-x EuxTe heterostructures on BaF2 / Crescimento por MBE e caracterização de filmes SnTe e heteroestruturas de SnTe/Sn1-x EuxTe sobre BaF2
This work presents a systematic investigation of structural and electrical properties of SnTe epitaxial films grown on BaF2 substrates, as well as a study of structural properties of Sn1-xEuxTe (0
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2005
-
3. MBE growth and characterization of films SnTe layers and SnTe/Sn1-x EuxTe heterostructures on BaF2 / Crescimento por MBE e caracterização de filmes SnTe e heteroestruturas de SnTe/Sn1-x EuxTe sobre BaF2
Este trabalho tem por objetivo a investigação sistemática das propriedades estruturais e elétricas de filmes epitaxiais de SnTe crescidos sobre substratos de BaF2 (111), bem como o estudo das propriedades estruturais de filmes de Sn1-xEuxTe (0<xEu=0,12) crescidos sobre camadas intermediárias de SnTe pré-depositadas sobre substratos de BaF2 (111). As
Publicado em: 2005
-
4. Espectroscopia de dupla ressonancia optica em calcio / Double ressonance optical spectroscopy in calcium
This work consists of a study of the weak 1 S 0 - 3 P 1 calcium transition in an atomic beam. This intercombination transition at 657 nm is a promising unified standard of length, time and frequency. Direct optical detection requires is difficult because it is a weak transition (g ~ 2000 s -1). However since calcium has a strong transition ( 1 S0 - 1 P1) whi
Publicado em: 2004
-
5. Estudos espectroscopicos em atomos e moleculas : calculos de forças de osciladores e tempos de vida para ions de Si, medidas de momento de recuo de ions em atomos de Cs resfriados a laser e medidas de multicoincidência em moleculas de N2 e O2
This thesis comprises atomic and molecular physics studies, both theoretical and experimental. Weighted oscillator strengths and lifetimes were calculated for the following silicon ions: Si I, Si XI, Si XII and Si XIII. The calculations were carried out in a multiconfiguration Hartree-Fock relativistic aproach. The eletrostatic parameters were optimized by a
Publicado em: 2003
-
6. Determination of the crystallographic structure of the human glucose-6-phosphate isomarase by x-ray diffraction / Determinação da estrutura cristalográfica por difração de raios-x da enzima glicose 6-fosfato isomerase humana
This work is presented as part of the Master degree requirements of the Applied Physics program, Biomolecular Physics area. The purpose of this work is the structural study by of the human glucose-6-phosphate isomerase (PGI-hum). This work has involved mainly three areas: Molecular Biology, Biochemistry and Crystallography. The Molecular Biology work was int
Publicado em: 2001
-
7. A caracterização de laser de diodo para espectroscopia de alta resolução
In the last decade the diode lasers became the most important in economics. The use of diode lasers in Physics and Technology has expanded rapidly. This has occurred because their low cost, reliability , durability and possibility of integrating with electronic components to form integrated optoeletronic circuits. The development of novel techniques to contr
Publicado em: 1997