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1192. On the Auger mechanism of characteristic losses in atomic collisions
Classified abstracts 1190-1206 18 1190. On the theory of low voltage arcs in caesium. (USSR) Analysis of the regime of typical thermionic converters is given for the case of relatively high cathode temperatures. B Ya Moyzhes and F G Baksht, Zh Tekh Fiz, 38 (4), April 1968, 709-723 (in Russian). 18 1191. Some thermionic properties of polycrystalline platinum and iridium wires. (USSR) The thermionic work functions of polycrystalline platinum and iridium wires were found to be 5.13 eV and 5.40 eV respectively. The work functions of surface ionization for bismuth on the two metals were 5.77 eV and 5.8 eV respectively. The emission from platinum before baking for two hours at 1950°K was unstable due to adsorbed hydrocarbons and hydrogen dissolved in the metal. E Ya Zandberg and A Ya Tontegode, Zh Tekh Fiz, 38 (4), April 1968, 737-741 (in Russian). 18 1192. On the Auger mechanism of characteristic losses in atomic collisions. (USSR) Some aspects of the theory of producing multi-charged ions in collisions between atoms and fast ions, taking account of the Auger effect, are discussed. L M Kishinevskiy and E S Parilis, Zh Tekh Fiz, 38 (4), April 1968, 760-763 (in Russian). 18 1193. On the surface ionization of alkaline halide molecules on platinum. (USSR) The surface ionization of CsC1 and KCI on Pt was measured and a very strong influence of cleanliness of the surface was observed. For a clean platinum surface the character of the process is similar to that for iridium. E Ya Zandberg and A Ya Tontegode, Zh Tekh Fiz, 38 (4), April 1968, 763-766 ~in Russian). 18 1194. Instabilities in a low pressure discharge in a transverse magnetic field. (USSR) Argon discharges at 5 × 10-5 to 10-3 tort, with voltages of 1 to 7 kV and magnetic field of 0.2 to 2 kOe, were investigated. Short instabilities with simultaneous rise of the positive ion and negative electron currents were observed but the peaks strongly depend on the bending of the anode axis. At anode-to-magnetic field vector angles at which double anode electron layers are formed the amplitude of peaks is very small. N A Kervalishvili, Zh Tekh Fiz, 38 (4), April 1968, 770-773 (in
Russian). 18 1195. On the critical currents of an electron beam in plasma. (USSR) Methods are discussed for obtaining large beam currents from an electron gun by means of beam stabilization, when interaction of the beam with residual gases makes the beam unstable. M D Rayzer et al, Zh Tekh Fiz, 38 (4), April 1968, 776-779 (in
Russian). 18 1196. The effect of the Coulomb interaction in multi-photon ionization. (USSR) Corrections for the Coulomb interaction between an electron and an atomic residue are calculated for the ionization of gas atoms by a strong wave of light. A M Perelomov et al, Zh Eksper Teor Fiz, 54 (3), March 1968, 841-854 (in Russian). 18 1197. Effect of temperature on the properties of pulsed laser action in electron transitions in diatomic molecules. (USSR) The temperature dependence of the optical gain is studied theoretically for a nitrogen laser and the results are experimentally proved. Cooling of the gas down to 80°K increases the total output power by 35 to 50 per cent. V M Kaslin and G G Petrash, Zh Eksper Teor Fiz, 54 (4), April 1968, 1051-1063 (in Russian).
530
18 1198. Role of bound sta¢es in multi-photon ionization of atoms. (USSR) Multi-photon ionization of Xe and Kr atoms by the 2nd harmonics of the laser radiation was observed. G A Delone and N B Delone, Zh Eksper Teor Fiz, 54 (4), April 1968, 1067-1068 (in Russian). 18 1199. Investigation of high temperature phenomena due to focusing of intense radiation from a laser on a solid target. (USSR) A solid target was located in a chamber at a pressure of 10-e to 50 torr and irradiated by laser light pulses of 3 nanosec duration and the plasma (torch) produced by the incidence of light on the target was optically investigated. The main gas parameters of the shock wave and the electron density distribution in the torch were determined and good accordance with the theoretical values was found. N G Basov et al, Zh Eksper Teor Fiz, 54 (4), April 1968, 1073-1087
(in Russian). 18 1200. Investigation of the high temperature electron component of a plasma produced in a plasma-beam system. (USSR) A model of plasma heating by an electron beam is discussed, based on the assumption that the source of the heated particles is the electron beam. To prove the theoretical model the properties of the hot component of plasma produced by an intense electron beam in an adiabatic trap were determined. L P Zakatov et al, Zh Eksper Teor Fiz, 54 (4), April 1968, 1088-1098
(in Russian). 18 1201. Quasielassical approximation in ionization problems. (USSR) Ionization of a bound level in collisions with a charged particle, ionization of atoms by a constant electric field in the presence of a magnetic field and evaluation of adiabatic corrections to the probability for tunnelling through a potential barrier of arbitrary shape are discussed using a theory based on complex trajectory technique. L P Kotova et al, Zh Eksper Teor Fiz, 54 (4), April 1968, 1151-1161
(in Russian). 18 1202. Quasilinear theory of electron beam relaxation in a magneticactive plasma. (USSR) Quasilinear relaxation of an electron beam in a plasma in the presence of a strong magnetic field is theoretically investigated. V D Shapiro and V I Shevchenko, Zh Eksper Teor Fiz, 54 (4), April 1968, 1187-1202 (in Russian). 18 1203. Ionization of gases by 0.2 to 1.8 MeV He + ions. (USSR) An apparatus is briefly described for measuring the effective cross sections for formation of slow positive ions and free electrons in H2, N2, He, Ne, Ar and Kr by fast He + ions and values measured by the apparatus are discussed. L I Pivovar et al, Zh Eksper Teor Fiz, 54 (5), May 1968, 1310-1317
(in Russian). 18 1204. Deviations from Maxwellian distribution of electron energies in a weakly ionized plasma. (USSR) The problem of determining the distribution function of fast electrons and number density of atoms on the first excited level when the first excitation potential exceeds the mean electron energy is theoretically discussed. E B Sonin, Zh Eksper Teor Fiz, 54 (5), May 1968, 1554-1561 (in
Russian). 18 1205. Elastic scattering of electrons on helium atoms. (USSR) An equation set is derived for calculation on the phase shift of the s-wave of electron elastic scattering on helium atoms. R K Peterkop, Zh Eksper Teor Fiz, 54 (5), May 1968, 1581-1589
(in Russian). 18 1206. Propagation of perturbanees and noises along an electron stream penetrating a low-voltage arc plasma. (USSR) Macroscopic theory is presented to explain effects observed in the second layer of the low-voltage arc plasma produced near to the cathode. S D Gvozdover, Radiotekh Elektron, 13 (3), March 1968, 490-498
(in Russian).
Russian). 18 1195. On the critical currents of an electron beam in plasma. (USSR) Methods are discussed for obtaining large beam currents from an electron gun by means of beam stabilization, when interaction of the beam with residual gases makes the beam unstable. M D Rayzer et al, Zh Tekh Fiz, 38 (4), April 1968, 776-779 (in
Russian). 18 1196. The effect of the Coulomb interaction in multi-photon ionization. (USSR) Corrections for the Coulomb interaction between an electron and an atomic residue are calculated for the ionization of gas atoms by a strong wave of light. A M Perelomov et al, Zh Eksper Teor Fiz, 54 (3), March 1968, 841-854 (in Russian). 18 1197. Effect of temperature on the properties of pulsed laser action in electron transitions in diatomic molecules. (USSR) The temperature dependence of the optical gain is studied theoretically for a nitrogen laser and the results are experimentally proved. Cooling of the gas down to 80°K increases the total output power by 35 to 50 per cent. V M Kaslin and G G Petrash, Zh Eksper Teor Fiz, 54 (4), April 1968, 1051-1063 (in Russian).
530
18 1198. Role of bound sta¢es in multi-photon ionization of atoms. (USSR) Multi-photon ionization of Xe and Kr atoms by the 2nd harmonics of the laser radiation was observed. G A Delone and N B Delone, Zh Eksper Teor Fiz, 54 (4), April 1968, 1067-1068 (in Russian). 18 1199. Investigation of high temperature phenomena due to focusing of intense radiation from a laser on a solid target. (USSR) A solid target was located in a chamber at a pressure of 10-e to 50 torr and irradiated by laser light pulses of 3 nanosec duration and the plasma (torch) produced by the incidence of light on the target was optically investigated. The main gas parameters of the shock wave and the electron density distribution in the torch were determined and good accordance with the theoretical values was found. N G Basov et al, Zh Eksper Teor Fiz, 54 (4), April 1968, 1073-1087
(in Russian). 18 1200. Investigation of the high temperature electron component of a plasma produced in a plasma-beam system. (USSR) A model of plasma heating by an electron beam is discussed, based on the assumption that the source of the heated particles is the electron beam. To prove the theoretical model the properties of the hot component of plasma produced by an intense electron beam in an adiabatic trap were determined. L P Zakatov et al, Zh Eksper Teor Fiz, 54 (4), April 1968, 1088-1098
(in Russian). 18 1201. Quasielassical approximation in ionization problems. (USSR) Ionization of a bound level in collisions with a charged particle, ionization of atoms by a constant electric field in the presence of a magnetic field and evaluation of adiabatic corrections to the probability for tunnelling through a potential barrier of arbitrary shape are discussed using a theory based on complex trajectory technique. L P Kotova et al, Zh Eksper Teor Fiz, 54 (4), April 1968, 1151-1161
(in Russian). 18 1202. Quasilinear theory of electron beam relaxation in a magneticactive plasma. (USSR) Quasilinear relaxation of an electron beam in a plasma in the presence of a strong magnetic field is theoretically investigated. V D Shapiro and V I Shevchenko, Zh Eksper Teor Fiz, 54 (4), April 1968, 1187-1202 (in Russian). 18 1203. Ionization of gases by 0.2 to 1.8 MeV He + ions. (USSR) An apparatus is briefly described for measuring the effective cross sections for formation of slow positive ions and free electrons in H2, N2, He, Ne, Ar and Kr by fast He + ions and values measured by the apparatus are discussed. L I Pivovar et al, Zh Eksper Teor Fiz, 54 (5), May 1968, 1310-1317
(in Russian). 18 1204. Deviations from Maxwellian distribution of electron energies in a weakly ionized plasma. (USSR) The problem of determining the distribution function of fast electrons and number density of atoms on the first excited level when the first excitation potential exceeds the mean electron energy is theoretically discussed. E B Sonin, Zh Eksper Teor Fiz, 54 (5), May 1968, 1554-1561 (in
Russian). 18 1205. Elastic scattering of electrons on helium atoms. (USSR) An equation set is derived for calculation on the phase shift of the s-wave of electron elastic scattering on helium atoms. R K Peterkop, Zh Eksper Teor Fiz, 54 (5), May 1968, 1581-1589
(in Russian). 18 1206. Propagation of perturbanees and noises along an electron stream penetrating a low-voltage arc plasma. (USSR) Macroscopic theory is presented to explain effects observed in the second layer of the low-voltage arc plasma produced near to the cathode. S D Gvozdover, Radiotekh Elektron, 13 (3), March 1968, 490-498
(in Russian).