Effect of Thermal Neutron Irradiation on the Electrical Properties of Lead-Selenium Substituted S70Se30-XPbX Chalcogenide Glasses

Mahmoud Y. Hajem; Kareem A.  Jasim

doi:10.30526/38.4.4115

Authors

Mahmoud Y. Hajem Department of Physics, College of Education for Pure Science (Ibn Al-Haitham), University of Baghdad. Baghdad, Iraq. https://orcid.org/0009-0001-4905-9711
Kareem A. Jasim Department of Physics, College of Education for Pure Science (Ibn Al-Haitham), University of Baghdad. Baghdad, Iraq. https://orcid.org/0000-0001-9784-6966

DOI:

https://doi.org/10.30526/38.4.4115

Keywords:

Melting point, Radiation dose, Thermal neutron radiation, Electrical properties, Electron hopping, Electrical conductivity

Abstract

This study included the effect of thermal neutron radiation and partial replacement of selenium with lead for S₇₀Se_30-xPb_x alloy samples with different lead concentrations (x = 0 and 5) prepared by the melting point technique. The samples were examined before and after thermal neutron irradiation for seven days with Am²⁴¹−Be⁹ radioactive source, with a radiation dose of . Continuous electrical conductivity analysis revealed changes in all samples, attributed to the rearrangement of the crystal structure caused by radiation-induced disturbances. These changes led to modifications in the electrical properties of the irradiated samples compared to the non-irradiated ones. compared to the non-irradiated ones. Three different conduction mechanisms were found. At low temperatures, the electron transition occurred via electron hopping between localized states close to the Fermi energy. At intermediate temperatures, the conduction occurred via electron hopping between localized levels between the tails of the conduction and valence bands. The electrons moved through extended levels within the two bands at high temperatures. The results indicated that the calculated densities of extended, localized, and Fermi-level states underwent significant changes due to thermal neutron radiation and partial substitution

Author Biographies

Mahmoud Y. Hajem, Department of Physics, College of Education for Pure Science (Ibn Al-Haitham), University of Baghdad. Baghdad, Iraq.

Department of Physics, College of Education for Pure Science (Ibn Al-Haitham), University of Baghdad. Baghdad, Iraq.
Kareem A. Jasim, Department of Physics, College of Education for Pure Science (Ibn Al-Haitham), University of Baghdad. Baghdad, Iraq.

Department of Physics, College of Education for Pure Science (Ibn Al-Haitham), University of Baghdad. Baghdad, Iraq.

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