Výsledky vyhledávání - "S. D. Magalhães"

A árvore da Fortuna I, na confluência entre a história e o cinema

Publikováno v: Textos e Debates; n. 8 (2005)
Textos e Debates; No. 8 (2005)
Textos & Debates
Universidade Federal de Roraima (UFRR)
instacron:UFRR

Sem resumo.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::475d40e9b69245aabac17834a3f83587
https://revista.ufrr.br/textosedebates/article/view/2826

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A simple method for fast negative atomic and molecular ion studies in tandem accelerators

Autor: Fabio Zappa, N. V. de Castro Faria, S. D. Magalhães, E. Bessa Filho, H. Luna, L. F. S. Coelho, Ginette Jalbert, J.C Acquadro

Publikováno v: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 171:373-378

A simple method is proposed for measuring cross-sections of fast negative atomic and molecular ions colliding with atoms and molecules. The method, applicable to tandem accelerators, uses the stripping process of the negative ions, occurring at the g

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::47201de57cabe0c82292e3a56178fc3d
https://doi.org/10.1016/s0168-583x(00)00264-0

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Current status of the Brazilian AMS program

Autor: S. D. Magalhães, Roberto Meigikos dos Anjos, M M Coimbra, P. R. S. Gomes, Kita Macario, R. Liguori Neto, Carlos Roberto Appoloni, J.C Acquadro, Nemitala Added, Raul Donangelo, N. V. de Castro Faria, Guaciara M. Santos

Publikováno v: Scopus-Elsevier

The status and the near future plans for the Brazilian AMS program are described. The 8 MV Tandem accelerator at the University of Sao Paulo (USP) is ready to measure standard AMS samples. A recently installed 1.7 MV Tandem at the University of Rio d

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a5e40afb0e9caecd0c27da0c062b68f0
https://doi.org/10.1016/s0168-583x(00)00145-2

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O ESTADO DE RORAIMA E AS FRONTEIRAS COM A VENEZUELA E A GUIANA

Autor: Maria Das Graças S. D. Magalhães

Publikováno v: Textos e Debates; No. 12 (2007)
Textos e Debates; n. 12 (2007)
Textos & Debates
Universidade Federal de Roraima (UFRR)
instacron:UFRR

Não consta na edição publicada.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::364072d6a7711fa0bea78d2f5ad61626
https://revista.ufrr.br/textosedebates/article/view/1152

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Electron detachment of negative ions: The influence of the outermost electron and its neutral core atom in collision with He, Ne, and Ar

Autor: Wania Wolff, Ginette Jalbert, N. V. de Castro Faria, S. D. Magalhães

Publikováno v: Physical Review A. 77

A systematic investigation of the absolute total detachment cross sections of atomic negative ions is presented and a simple semiclassical model developed based on the experimental findings. The total electron detachment process for several anion spe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::881dc25d77ff9ee185af92aeb8187c79
https://doi.org/10.1103/physreva.77.012722

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Collisional electron detachment of atomic anions by noble gases: universal behavior at intermediate velocities

Autor: Ginette Jalbert, L. F. S. Coelho, S. D. Magalhães, Fabio Zappa, N. V. de Castro Faria, Alexandre B. Rocha

Publikováno v: Brazilian Journal of Physics, Volume: 34, Issue: 3a, Pages: 825-828, Published: SEP 2004
Brazilian Journal of Physics v.34 n.3a 2004
Brazilian Journal of Physics
Sociedade Brasileira de Física (SBF)
instacron:SBF

Anions with atomic number lower than 18 had their total electron detachment cross sections measured in the 0.3-1.5 a.u. velocity range (40 keV-1.4 MeV) for He, Ne, and Ar targets with a experimental method developed in our laboratory. Several univers

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6c12bd82c5d2fe9f2cab62432edbd529
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332004000500031&lng=en&tlng=en

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Absolute total destruction cross sections of B and Al small anionic clusters impinging onN2targets

Autor: S. D. Magalhães, Fabio Zappa, João Alberto Martins Pereira, M. H. P. Martins, Wilma M S Santos, A. L. F. de Barros, Adir M Luiz, N. V. de Castro Faria, L. F. S. Coelho

Publikováno v: Physical Review A. 67

Absolute total destruction cross sections of B{sub n}{sup -} (n=1,2) and Al{sub n}{sup -} (n=1-4) clusters colliding with N{sub 2} were measured for relative velocities in the interval 0.2-1.0 a.u. All cross-section curves may be described as a singl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f003339fc313e5af44f86f9610bab6f6
https://doi.org/10.1103/physreva.67.012702

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