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18 results on '"Borges, F.I.G.M."'

6. Xenon-Neon Gas Proportional-Scintillation Counters for X-Rays Below 2 keV: A Monte Carlo Simulation Study.

Author

Borges, F.I.G.M., Santos, F.P., Dias, T.H.V.T., Rachinhas, P.J.B.M., Conde, C.A.N., and Stauffer, A.D.

Subjects
XENON, NEON, MONTE Carlo method, SCINTILLATION counters, SIMULATION methods & models
Abstract

Investigates the use of Xenon-Neon mixtures as detection media using a Monte Carlo simulation method. Use of xenon-filled gas proportional-scintillation counters (GPSC); Way of overcoming the problem that result from the loss of the performance of a GPSC; Overview of the Monte Carlo simulation.

Published
2002
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7. Electroluminescence yield for ...>165 nm in neon-xenon mixtures: Experimental results.

Author

Borges, F.I.G.M. and Santos, J.M.F. dos

Subjects
SCINTILLATION spectrometry
Abstract

Presents information on the experimental electroluminescence yield for ...>165nm in neon-xenon mixtures, as a function of the reduced electric field in a uniform-field gas proportional scintillation counter. Total pressure used in the experiment; Nature of the thresholds studied; Results generated.

Published
1997
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9. Experimental measurement of H3+/H5+ and D3+/D5+ mobilities in their parent gases.

Author

Neves, P.N.B., Escada, J., Borges, F.I.G.M., Tavora, L.M.N., and Conde, C.A.N.

Abstract

The experimental study of the reduced mobility K0 of the molecular ions H3+/H5+ in H2 and D3+/D5+ in D2 was carried out using a recently developed technique, that uses a Xe VUV flash lamp and a Gaseous Electron Multiplier (GEM) microstructure with a CsI deposit to produce the molecular ions by electron avalanche ionization. For both gases, the K0 values were obtained at room temperature (295 K) and at pressures from 5 to 50 Torr for uniform reduced electric fields E/N from 4 to 40 Td. The reduced mobility derived from the measurements is an average of the K0 value of the two molecular ions, and for the H3+ and H5+ ions is 11.1 cm2V−1s−1 while for D3+ and D5+ it ranges from 8.5 to 7.8 cm2V−1s−1, for pressure from 5 to 50 Torr. A discussion of the obtained results is presented. [ABSTRACT FROM PUBLISHER]

Published
2011
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