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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/2962
Title: Measurements of mass attenuation coefficients and determination of photoionization cross sections at energies across the Li (i=1–3) edges of 66Dy
Authors: Kaur R.
Kumar A.
Osan J.
Czyzycki M.
Karydas A.G.
Puri S.
Published in: Radiation Physics and Chemistry
Abstract: The absolute values of the mass attenuation coefficients have been measured at sixty two photon energies across the Li (i=1–3) sub-shell absorption edges of 66Dy covering the region 7.6–14.0 keV in order to investigate the influence of near-edge processes on the attenuation coefficients. The present measured attenuation coefficients are found to be higher by up to 10% than the theoretical values evaluated from the computer code XCOM (Berger et al., 2010) and the self-consistent Dirac-Hartree-Slater (DHS) model based values tabulated by Chantler (1995) over the energy region 7.6–14.0 keV, except at energies in vicinity (few eV) of the Li (i=1–3) sub-shell absorption edge energies where the measured values are significantly higher (up to 37%) than both the sets of theoretical values. Further, the Li (i=1–3) sub-shell photoionization cross sections, (?Li P)exp, deduced from the present measured mass attenuation coefficients are compared with the non-relativistic Hartree-Fock-Slater (HFS) model based values tabulated by Scofield (1973) and those evaluated from the theoretical total photoionization attenuation coefficients tabulated by Chantler (1995). The deduced (?Li P)exp(i=1–3) values are found to be in better agreement with those evaluated from the tabulations given by Chantler (1995) than the values given by Scofield (1973) over the energy region 7.8 – 14.0 keV included in this study. However, at photon energies up to few eV above the Li edges, the deduced (?Li P)exp(i=1–3) values are found to be significantly higher (up to 32%) than both the sets of theoretical values. © 2017 Elsevier Ltd
Citation: Radiation Physics and Chemistry (2017), 136(): 30-37
URI: https://doi.org/10.1016/j.radphyschem.2017.03.028
http://repository.iitr.ac.in/handle/123456789/2962
Issue Date: 2017
Publisher: Elsevier Ltd
Keywords: Absorption edge jump ratio
Mass attenuation coefficients
Photoionization cross sections
Synchrotron radiation
ISSN: 0969806X
Author Scopus IDs: 57191973635
7408043275
55960352200
35783836800
35566644000
7202592160
Author Affiliations: Kaur, R., Department of Basic and Applied Sciences, Punjabi University, Patiala, Punjab, India
Kumar, A., Department of Basic and Applied Sciences, Punjabi University, Patiala, Punjab, India
Osan, J., Department of Environmental Physics, Hungarian Academy of Sciences, Budapest, Hungary
Czyzycki, M., AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Krakow, 30-059, Poland, Physics section, Department of Nuclear Science and Applications, International Atomic Energy Agency, Vienna, Austria
Karydas, A.G., Institute of Nuclear and Particle Physics, NCSR “Demokritos”, Athens, 153 10, Greece, Physics section, Department of Nuclear Science and Applications, International Atomic Energy Agency, Vienna, Austria
Puri, S., Department of Basic and Applied Sciences, Punjabi University, Patiala, Punjab, India
Corresponding Author: Puri, S.; Department of Basic and Applied Sciences, Punjabi UniversityIndia
Appears in Collections:Journal Publications [CY]

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