SU-F-T-416: Dosimetric Comparison of Coplanar and Non- Coplanar IMRT Plans for Peripheral Lung Lesion The present study offers a wide scope for the experimental study for ionization of hydrogen atoms from the metastable 2P state. There is no available other theoretical results and experimental data for ionization of hydrogen atoms from the 2P state. Results show qualitative agreement with the available experimental data and those of other theoretical computational results for ionization of hydrogen atoms from ground state, and our first Born results. In this calculation, the final state is described by a multiple-scattering theory for ionization of hydrogen atoms by electrons. Triple differential cross sections (TDCS) for the ionization of metastable 2P-state hydrogen atoms by electrons are calculated for various kinematic conditions in the asymmetric coplanar geometry. The approach is related to the study of the low-energy effective closed string gravity actions.Įlectron impact ionization of metastable 2P-state hydrogen atoms in the coplanar geometry Generalized geometry provides the framework for a systematic approach to non- symmetric metric gravity theory and naturally leads to an Einstein-Kalb-Ramond gravity theory with totally anti- symmetric contortion. JurÄo, Branislav Khoo, Fech Scen Schupp, Peter Vysoký, Jan Generalized geometry and non- symmetric metric gravity Numerical results show that the TDCS are strongly dependent on the dressing of the projectile by the laser field at low frequency in (e, 2e) spectroscopy region. Significant changes are noted both in the shape and magnitude of the triple differential cross sections (TDCS) by the application of the laser field. The influence of the laser parameters on the angular distribution is analyzed and several illustrative examples are discussed. The wave functions of the ingoing and outgoing electrons in the laser field are treated as non-relativistic Volkov waves, while the interaction of the bound electron with the laser field is treated by using first-order perturbation theory, assuming that the electric field strength associated with the external laser field is much less than the atomic unit e/-1. The interaction of the laser field with the unbound electrons is treated in a non-perturbative way. The modification due to an external linearly polarized monochromatic laser field on the dynamics of the ionization process of an atomic hydrogen by electron-impact is studied theoretically for a coplanar symmetric geometry. Laser-assisted coplanar symmetric (e, 2e) triple differential cross sections This indicates that the present second-order Born term is capable to give a reasonable correction to DWBA model in studying coplanar symmetric (e, 2e) problems of two-valence-electron target in low energy range. Comparing with the standard first-order DWBA calculations, the inclusion of the second-order Born term in the scattering amplitude improves the degree of agreement with experiments, especially for backward scattering region of TDCS. The second-order distorted wave Born approximation (DWBA) method is employed to investigate the triple differential cross sections (TDCS) of coplanar doubly symmetric (e, 2e) collisions for magnesium at excess energies of 6 eV-20 eV. Second-order Born calculation of coplanar symmetric (e, 2e) process on Mg The TDCSs at the gun angles Psi = 30^circ, and Psi = 60^circ are predicted. A deep interference minimum appears in the TDCS in the coplanar symmetric geometry and a strong peak at scattering angle xi = 90^circ caused by the single collision mechanism has been observed in the perpendicular plane geometry. The present theoretical results at gun angles Psi = 0^circ ( coplanar symmetric geometry) and Psi = 90^circ (perpendicular plane geometry) are in satisfactory agreement with the available experimental data. The distorted wave Born approximation (DWBA) with the spin averaged static exchange potential has been used to calculate the triple differential cross-sections (TDCSs) for Ne (2s^2) ionization by electron impact in coplanar to perpendicular plane symmetric geometry at 110.5 eV incident electron energy. Triple differential cross-sections of Ne (2s2) in coplanar to perpendicular plane geometryĬhen, L.
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