Written in English
Thesis (Ph. D.)--The Queen"s University of Belfast, 1954.
|The Physical Object|
Part of the Physics of Atoms and Molecules book series (PAMO) In this article we survey some new theoretical results on (e, 2e) excitation — ionization and excitation — autoionization of ground state helium. A fuller account may be found in references [1–3].Cited by: 6. A detailed investigation of excitation of He (1s 2) 1 S to He (1snp) 1 P degree(s) (n equals 2 - 5) states and ionization-excitation of He (1s 2) 1 S to He (2p) 2 P degree(s) and He (3p) 2 P degree(s) states in e-+ He and H + + He collision systems is presented for a wide range of projectile velocities ( a.u. Cited by: 2. 4. Ionization and excitation of atoms and molecules 5. Passing of charged particles through matter 6. Interaction of gamma quanta with matter 7. Interaction of neutrons with matter 8. Elementary processes of the transformation of radiation energy in matter 9. Electron attachment Diffusion and drift of charges Recombination of charges The spectra of multiple excitation/ionization of the CO in the gas phase in the region of the 2σ-shell ionization threshold are studied theoretically. The processes of additional excitation/ionization from 1 π -, 4 σ - and 5 σ -shells are by: 5.
EXCITATION AND IONIZATION BY ELECTRON IMPACT energies it overestimates by a factor of about 5 while at high energies the ratio Q/Qci increases as log W. I n a q u a n t u m t r e a t m e n t one finds that rarely approaches unity, even for small impact p a r a m e t e r s ; this explains w h y the classical theory overestimates the low-energy cross,A 0 log.o (W / I) 10 by: A theory is presented for the rates of excitation, deexcitation, and ionization arising from the impact of two heavy particles at thermal energies. The rates for the forward and backward transitions are shown to satisfy the principle of detailed by: Ionization and excitation of some atomic targets and metal oxides by electron impact. is used to derive total inelastic cross-sections resulting from ionization as well as excitation processes. Excitation and Ionisation. Excitation. Excitation is the result of energy being given to an electron moving it to a higher energy level. It will still orbit the nucleus, unless the electron energy level is greater than the ionisation energy level of the atom.
The book is meant as an introduction into the field and provides some basic theoretical understanding of the atomic processes occurring when a projectile hits another atom. It also furnishes the tools for a mathematical description, however, without going deeper into the technical details, which can be found in the literature given. In just over a decade, a number of non-perturbative close-coupling methods have been developed that are capable of very accurate calculations of elect Cited by: 4. The characteristic excitation/emission maximum at the time of maximum sheath voltage at each electrode is found to be based on two mechanisms: (i) a direct channel, i.e. excitation/emission caused by electrons generated by Penning ionization inside the sheaths and (ii) an indirect channel, i.e. secondary electrons emitted from the electrode due Cited by: 6. In this Chapter, excitation, ionization and electron capture processes arising in ion-atom collisions are considered. Special attention is paid to the processes involving negative hydrogen atoms. View.