Results 291 to 300 of about 9,808,693 (352)
Some of the next articles are maybe not open access.
IEEE Transactions on Electron Devices, 1966
This paper discusses the fabrication and properties of a new class of microwave limiter device, based on the impact ionization of deep levels in silicon. In this device a deep lying impurity is used to provide a large number of states from which the impact generation of carriers can proceed.
S.K. Ghandhi, K.E. Mortenson, J.N. Park
openaire +1 more source
This paper discusses the fabrication and properties of a new class of microwave limiter device, based on the impact ionization of deep levels in silicon. In this device a deep lying impurity is used to provide a large number of states from which the impact generation of carriers can proceed.
S.K. Ghandhi, K.E. Mortenson, J.N. Park
openaire +1 more source
On the impact ionization in tellurium
Physica Status Solidi (a), 1973Measurements of the current-voltage characteristic of tellurium were made within the range of breakdown, at a lattice temperature of 77K, and the time behaviour of the breakdown was investigated. Both the s-shaped current-voltage characteristic and the time behaviourof the breakdown effected by interband impact ionization can be explainedonly if the ...
W. Hoerstel, R. Link, R. Neubert
openaire +1 more source
Proceedings of the Physical Society, 1965
The cross sections for Na(3s) +X → Na+ +e +X, in which X is a proton or an electron, are calculated by the first Born approximation. In the proton case the cross section obtained passes through a maximum of 1.9 × 10-15cm2 at an impact energy of 7.6 keV, and in the electron case it passes through a maximum 5.6 × 10-16 cm2 at an impact energy of 14 eV.
D R Bates, Anne H Boyd, S S Prasad
openaire +1 more source
The cross sections for Na(3s) +X → Na+ +e +X, in which X is a proton or an electron, are calculated by the first Born approximation. In the proton case the cross section obtained passes through a maximum of 1.9 × 10-15cm2 at an impact energy of 7.6 keV, and in the electron case it passes through a maximum 5.6 × 10-16 cm2 at an impact energy of 14 eV.
D R Bates, Anne H Boyd, S S Prasad
openaire +1 more source
Ionization of molecular hydrogen by proton impact. I. Single ionization
Physical Review A, 1992Single-ionization cross sections of the proton-hydrogen molecule collision are calculated in semiclassical approximation by using atomic and Heitler-London-like two-center molecular wave functions for the ground state of H{sub 2}. In transition matrix elements, calculated with two-center wave functions, the factors depending on {vert bar}{bold r}{minus}
, Nagy, , Végh
openaire +2 more sources
Electron impact ionization by drifting electrons in weakly ionized plasmas
Physical Review E, 2001The expression for electron impact ionization rate by a Maxwellian electron population drifting with respect to a uniform neutral atom background is derived. Depending on electron temperature, drift speeds between one to five times electron thermal velocity produce increments in the ionization rate from two to seven orders of magnitude.
L, Conde +2 more
openaire +2 more sources
Impact excitation and ionization
Journal of Luminescence, 1981Abstract Three impact processes relevant to high-field electroluminescence are considered, namely ionization across the band gap, impurity ionization and impurity excitation. The measured impact rate as a function of field is a convolution of the rate as a function of electron energy and of the distribution of electron energies. Experimental data for
openaire +1 more source
Electron transport and impact ionization in Si
Physical Review B, 1990We examine hot-electron transport with emphasis on the impact-ionization phenomena in crystalline Si using the Monte Carlo method. Contrary to the usual treatment of impact ionization exploiting the Keldysh formula ([Sov. Phys.---JETP 10, 509 (1960)] [Zh. Eksp. Teor. Fiz.
, Sano, , Aoki, , Tomizawa, , Yoshii
openaire +2 more sources
Electron impact ionization of furanose alcohols
The Journal of Chemical Physics, 2010Electron impact ionization of the gas phase 3-furanol, tetrahydro (3-hydroxytetrahydrofuran, 3HTHF) and 2-furanmethanol, tetrahydro (α-tetrahydrofurfuryl alcohol, THFA) molecules has been studied both experimentally and theoretically. The electron induced positive ion formation has been investigated experimentally using a crossed electron/neutral beams
A R, Milosavljević +7 more
openaire +2 more sources
Ion-impact ionization of He targets
Physical Review A, 1992We calculate double-differential cross sections for the impact ionization of He targets by 1.5-MeV H{sup +} and 28.5-MeV F{sup 9+} ions using the distorted-wave strong-potential Born approximation. The theory is compared with the experimental electron spectrum.
, Brauner, , Macek
openaire +2 more sources
Electron-impact ionization of the tungsten atom
Physical Review A, 1992The near-threshold electron-impact ionization cross section for the tungsten atom is calculated in a distorted-wave approximation. A shape resonance is found to have a large effect on the total cross sections for the 6s and 5d subshells. The shape resonance in the l=2 scattering channel is most clearly defined when one examines the differential cross ...
, Pindzola, , Griffin
openaire +2 more sources