Many-Particle Dynamics in Collisions of Electrons, Positrons and Photons
A special issue of Atoms (ISSN 2218-2004).
Deadline for manuscript submissions: closed (15 July 2023) | Viewed by 24819
Special Issue Editors
Interests: atomic, molecular and optical physics; electron and positron collision physics; fundamental processes in low temperature plasmas; ion trapping and its dynamics in an electrostatic trap
Special Issues, Collections and Topics in MDPI journals
Interests: electron and photon-induced processes for molecules and their ions; ultrafast processes
Special Issues, Collections and Topics in MDPI journals
Interests: atomic and molecular physics; physics of atoms/molecules/ions of astrophysical, plasma, and fundamental interest; theoretical investigations of quantum collisions involving electron, positron, and photon scattering from atoms, molecules, and their ions
Special Issues, Collections and Topics in MDPI journals
Special Issue Information
Dear Colleagues,
When cosmic rays and solar radiation travel through the molecular mediums of the universe, several processes viz. molecular excitation (rovibrational, electronic), ionization, bond dissociation, etc. occur. These processes end up generating a flux of electrons, photons, charged species (anion, cation), intermediate unstable species and neutral atoms, and smaller molecules. The secondary photons further interact with the surrounding medium producing secondary electrons, charged particles, ions, radicals, electromagnetic radiation, etc. Furthermore, the interaction of solar radiation with the interstellar gas clouds, or with the upper atmosphere of a planet, initiates photochemistry in these environments. The primary processes occurring in this medium are photoionization and photodetachment followed by absorption of radiation. Thus, the data of molecular photo-processes bear the signatures of molecular species and hence the molecular environments. Therefore, such data are of primary interest to several fields of applied sciences including aeronomy, planetary science, interstellar molecular clouds, the solar nebula, radiation chemistry-physics, biology, dosimetry, radiation therapy, health physics, electron and X-ray microscopy, and photoelectron spectroscopy, etc. In the current scenario, it is also widely recognized that there are new technological advances in plasma processing and the utilization of plasmas in general, ranging from plasma medicine to material processing. These developments are based on the manipulation of plasma properties which in turn requires a detailed understanding of the atomic and molecular processes within plasmas. The collisions of electrons with atoms, molecules, ions, and surfaces are of fundamental importance in low-temperature plasmas, with numerous applications in plasma science and technologies.
Moreover, electron-induced collisions with biomolecules have geared up essentially due to their importance in radiobiology for understanding the radio-induced damages to live tissues. Understanding the underlying physics of such irradiations requires the full description of collisional processes induced by the radiative beam on the target under consideration. In addition to this, the advancement of laser technology and the development of coherent light sources make it possible to probe the molecules with a high level of sophistication. To analyze these experimental data, we need theoretical advancement as well. Thus, there is a burning need for theoretical development as well.
In this edition of special Issue we invite original contributions covering all aspects of electron, positron and photon interaction with atoms, molecules, ions and surfaces both from experimental and theoretical point of view. Such data are of high demand in plasma science, radiation physics and astrophysics and astronomy. Accurate calculations of some metastable ions are also welcome.
Dr. Dhanoj Gupta
Dr. Suvam Singh
Dr. Paresh Modak
Guest Editors
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Keywords
- electron collision
- positron collision
- photon collision
- ionization
- excitation
- elastic scattering
- photoionization
- positronium formation
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