J de Urquijo et al 1999 J. Phys. D: Appl. Phys. 32 41 doi:10.1088/0022-3727/32/1/008
A time-resolved study of ionization, electron attachment and positive-ion drift in methane
J de Urquijo, C A Arriaga, C Cisneros and I Alvarez
Show affiliationsA pulsed Townsend swarm technique has been used to study electron-ionization and electron-attachment processes in methane over the density-normalized electrical field strength, 
, in the range 1.2-30 fV 
(120-3000 Td). The time-resolved ionic avalanches were obtained under conditions such that the occurrence of electron-attachment processes was detected unambiguously. The analysis of these avalanche pulses resulted in values of the effective ionization coefficients and positive-ion mobilities over the above range. To the best of our knowledge, no values of positive-ion mobilities had been published before for 
Td. The electron-attachment effects were observed up to 
Td.
- PACS
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51.10.+y Kinetic and transport theory of gases
34.80.Lx Recombination, attachment, and positronium formation
51.50.+v Electrical properties (ionization, breakdown, electron and ion mobility, etc.)
- Subjects
- Dates
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Issue 1 (7 January 1999)
Received 4 June 1998, in final form 21 September 1998
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A time-resolved study of ionization, electron attachment and positive-ion drift in methane
J de Urquijo et al 1999 J. Phys. D: Appl. Phys. 32 41
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An analysis of transverse evolution of electron swarms in gases using moment equations and a propagator method
Hirotake Sugawara and Y Sakai 1999 J. Phys. D: Appl. Phys. 32 1671
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The spatio-temporal development of electron swarms in gases: moment equation analysis and Hermite polynomial expansion
Hirotake Sugawara et al 1998 J. Phys. D: Appl. Phys. 31 319
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Growth and applications of Group III-nitrides
O Ambacher 1998 J. Phys. D: Appl. Phys. 31 2653
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An iterative projection-space reconstruction algorithm for tomography systems with irregular coverage
L C Ingesson and V V Pickalov 1996 J. Phys. D: Appl. Phys. 29 3009
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The development of electron avalanches in argon at high E/N values. II. Boltzmann equation analysis
H Tagashira et al 1977 J. Phys. D: Appl. Phys. 10 1051
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Transverse NMR shift in the 3He B phase
N A Greaves 1976 J. Phys. C: Solid State Phys. 9 L181
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NMR 'diffraction' in solids?
P Mansfield and P K Grannell 1973 J. Phys. C: Solid State Phys. 6 L422
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Electronic structure based on the local atomic environment for tight-binding bands
R Haydock et al 1972 J. Phys. C: Solid State Phys. 5 2845
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Many-band pseudopotential calculation of photoionization of zinc in silicon
M Jaros 1972 J. Phys. C: Solid State Phys. 5 1985
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