Effective atomic number, electron density and kerma of gamma radiation for oxides of lanthanides

Effective Atomic Numbers of Lanthanides with Gamma Radiation for Photon Energy Absorption

“…In the present work, we computed the Z PEA,eff with photon energy for selected oxides of lanthanides in different proportions were studied and also compared with the values of Z PI,eff [7]. The Z PI,eff is a measure of the electrostatic interaction between the negatively charged electron and protons in the atom or effective number of electrons per atom for photon interaction.…”

Extensive theoretical study of gamma-ray shielding parameters using epoxy resin-metal chloride mixtures

“…The to tal pho ton in ter ac tion cross-sec tion, s, can be writ ten as the sum over con tri bu tions from the prin ci pal pho ton in ter ac tions as the fol low ing [17] (4) where s pho is the atomic pho to elec tric ab sorp tion cross-sec tion which ob served in the en ergy re gion below 0.01 MeV. At the in ter me di ate en ergy re gion, 0.05 MeV < E < 5 MeV, s incoh compton scat ter ing (inco her ent) is dom i nant.…”

“…The ef fec tive mo lec u lar cross-sec tion, s mol , is de ter mined from the fol low ing equa tion us ing the values of the mass at ten u a tion co ef fi cient [17]…”

“…Ef fec tive atomic num ber, Z eff , is im por tant for the de ter mi na tion of a sub sti tute ma te rial for an el e -ment as so ci ated with the re quired en ergy. The ef fective atomic num ber [17,18] is equal to the ra tio of the atomic and elec tronic cross-sec tions…”

Effective atomic numbers and electron densities for some lanthanide oxide compounds using direct method in the energy region of 1 keV - 20 MeV

“…This motivated us to carry out the present study. Niranjan et al (2012) calculated Zeff and Neff (for total photon interaction) of these compounds using total and electronic cross-sections. But in the present work, the comparison between photon energy-absorption and photon interaction, and ZReff (relative to air) has been made in addition to the calculation of electron densities for photon interaction and photon energy absorption.…”