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Publikācija: Effect of Gamma Radiation on Thermostimulated Exoelectron Emission from Gd2O3 Films

Publication Type Scientific article indexed in SCOPUS or WOS database
Funding for basic activity Research project
Defending: ,
Publication language English (en)
Title in original language Effect of Gamma Radiation on Thermostimulated Exoelectron Emission from Gd2O3 Films
Field of research 1. Natural sciences
Sub-field of research 1.3 Physical sciences
Research platform Materials, Processes, and Technologies
Authors Marina Romanova
Regīna Burve
Stanislav Cichon
Jurijs Dehtjars
Ladislav Fekete
Daniels Jevdokimovs
Aija Krūmiņa
Kristaps Palskis
Vera Serga
Keywords Gadolinium oxide, exoelectron emission, gamma radiation, dosimetry
Abstract The effect of gamma irradiation on Gd2O3 films was studied using the thermostimulated exoelectron emission (TSEE) technique. The films were deposited on a glass and Si/SiO2 substrates using an extraction-pyrolytic method. Crystalline structure, chemical composition, film thickness and surface morphology were characterized by means of X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and atomic force microscopy (AFM). The films were irradiated by 10 MeV gamma photons and TSEE was measured from the irradiated films. It was found that gamma irradiation decreases TSEE intensity and the area below TSEE spectral curves. A linear correlation between the relative decrease in the area and the delivered dose was observed in a dose range of 0–10 Gy. These findings suggest that gamma radiation might decrease the density of trapped electrons present in the as-grown Gd2O3 films or create competing electron traps that inhibit TSEE from the films.
DOI: 10.1016/j.nimb.2019.11.016
Hyperlink: https://www.sciencedirect.com/science/article/pii/S0168583X1930775X 
Reference Romanova, M., Burve, R., Cichon, S., Dehtjars, J., Fekete, L., Jevdokimovs, D., Krūmiņa, A., Palskis, K., Serga, V. Effect of Gamma Radiation on Thermostimulated Exoelectron Emission from Gd2O3 Films. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2020, Vol. 463, pp.21-26. ISSN 0168-583X. Available from: doi:10.1016/j.nimb.2019.11.016
Additional information Citation count:
ID 29915