Abstract : The study of atomic and molecular processes relies heavily on ionization cross sections as a measure for understanding the interaction of photons with matter. The K-shell ionization cross sections for four elemental species—carbon (C), nitrogen (N), oxygen (O), and iron (Fe) are summarized in this abstract. A thorough comprehension of the ionization processes in these atoms is provided by the research, which combines theoretical and experimental techniques. Advanced quantum mechanical models, including the Hartree-Fock and density functional theory approaches, were used to conduct the theoretical calculations. For a variety of photon energy, our computations accurately estimate K-shell ionization cross sections by taking into account the effects of electron-electron correlation and relativistic corrections. Contributing to the understanding of experimental results and directing future research into the fundamental atomic processes, theoretical insights are invaluable. Synchrotron radiation sources and X-ray free-electron lasers were among the cutting-edge instruments used to do the experimental observations. The exact calculation of ionization cross sections was made possible by capturing the energy distribution of ejected photoelectrons using high-resolution spectrometers and detectors. Disagreements between experimental results and theoretical forecasts may point to the existence of supplementary physical effects or the necessity for more accurate theoretical models. This research delves into the dependence of K-shell ionization cross sections on photon energy, analyzing in detail resonance structures, thresholds and trends for all the variables that were taken into account. The unique electronic arrangements of the carbon, nitrogen, oxygen, and iron atoms are studied in detail to understand their impact on the K-shell ionization processes. Astrophysics, plasma physics, and materials science are just a few of the scientific and technological fields that stand to benefit from the findings of this study. To properly interpret observational data, build radiation shielding materials, and optimize X-ray-based technologies in medical and industrial applications, a thorough knowledge of K-shell ionization cross sections for these elements is essential.
Cite : Singh, S. R., & Sharma, D. S. (2023). Characterization Of K-Shell Ionization Cross Sections For Carbon, Nitrogen, Oxygen, Iron Atoms (1st ed., p. 264). Noble Science Press. https://doi.org/10.52458/9789388996570.2023.eb.ch47
References :
Basaglia T., Bonanomi M., Cattorini F., Han M.C, Hoff G., Kim C.H. , Kim S.H., Marcoli M., Pia M.G. , and Saracco P.(2018): “Validation of shell ionization cross sections for monte carlo electron transport”, IEEE Transactions on Nuclear Science, 65(8): 2279-2301.
Bizau J.M., Cubaynes D., Guilbaud S., El Hassan N., Al Shorman M.M., Bouisset E., Guigand J., Moustier O., Marié A., Nadal E. (2016): “A merged-beam setup at SOLEIL dedicated to photoelectron–photoion coincidence studies on ionic species. Journal of Electron Spectroscopy and Related Phenomena, 210:5–12.
Calle-Vallejo F., Martínez J. I., Rossmeisl J. (2011): “Density functional studies of functionalized graphitic materials with late transition metals for oxygen reduction reactions: Physical Chemistry Chemical Physics, 13:15639–15643.
Das S., Mishra S. (2020): “Insight into the isotherm modelling, kinetic and thermodynamic exploration of iron adsorption from aqueous media by activated carbon developed from Limonia acidissima shell”, 245: 122751.
Hamisu A., Khiter O., Al-Zhrani S., Haridh W.S.B., Al-Hadeethi Y., Sayyed M.I., Tijani S.A. (2023): “The use of nanomaterial polymeric materials as ionizing radiation shields”, Radiation Physics and Chemistry, 216:111448.
Huber S.E., Mauracher A., Süß D., Sukuba I., Urban J. , Borodin D., Probst M. (2019): “Total and partial electron impact ionization cross sections of fusion-relevant diatomic molecules”, The Journal of Chemical Physics, 150(024306):1-14.
Mauracher A., Echt O., Ellis A.M. , Yang S.,Bohme D.K.,Postler J., Kaiser A. , Denifl S., Scheier P. Top of Form (2018): “Cold physics and chemistry: Collisions, ionization and reactions inside helium nanodroplets close to zero K”, Physics Reports, 751:1-90.
McLaughlin B. M., Cubaynes D., Bizau J.M., Guilbaud S., Douix S., AI Shorman M.M., EI Ghazaly M.O.A., Sakho I., Gharaibeh M.F. (2017): K-shell photoionization of O4+ + and O5+ ions: experiment and theory, MNRAS,465:4690-4702.
Mosnier J.P., Kennedy E.T. , Bizau J.M., Cubaynes D., Guilbaud S. , Blancard C. (2021): “Photoionization Cross-Sections of Carbon-Like N+ Near the K-Edge (390–440 eV)”, Atoms, 9: 1-18.
Ralchenko Y. (2022): “Atomic Physics and Spectroscopy during the First 50 Years of JPCRD”, The Journal of Physical Chemistry, 1-13.
