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Caos em um sistema pósitron-molécula
(Universidade Federal de Minas GeraisUFMG, 2018-08-10)
The classical trajectories for a positron interacting collinearly with a vibrating molecule, are calculated in a search for a chaotic scattering behavior. The positron-molecule interaction has been modelled via coupled ...
Energy threshold in multiple ionization by electron or positron impact
(IOP Publishing, 2015-01)
The energy threshold for the formation of highly charged ions is experimentally well-known and measured. For single ionization, it is the binding energy of the outermost electrons. For multiple ionization, the ionization ...
Studies of threshold effects in the interaction of protons, electrons, and positrons in matter using dielectric models
(Elsevier Academic Press Inc, 2019-06)
A review of the behavior of the energy loss, mean-free path and straggling of protons, positrons, and electrons in an electron gas is performed using different dielectric models which represent the case of metals (Lindhard ...
Theory of ionization processes in positron-atom collisions
(Elsevier Science, 2006-12)
We review past and present theoretical developments in the description of ionization processes in positron-atom collisions. Starting from an analysis that incorporates all the interactions in the final state on an equal ...
Coronary microvascular dysfunction in women with nonobstructive ischemic heart disease as assessed by positron emission tomography
(AME Publishing Company, 2017-03)
Traditional approaches for risk assessment of ischemic heart disease (IHD) are based on the physiological consequences of an epicardial coronary stenosis. Of note, normal coronary arteries or nonobstructive coronary artery ...
Vortices in the three-body electron-positron-proton continuum system induced by the positron-impact ionization of hydrogen
(IOP Publishing, 2015-01-30)
By means of a systematic theoretical study of the transition matrix element T for the ${{e}^{+}}+{\rm H}$ ionization collisions in a collinear geometry, we uncover the presence of three isolated zeros at intermediate impact ...