Influence of ultraviolet and electron radiation on photoelectron emission spectra of lead sulfide nanoparticles embedded in a matrix of zirconium oxide

Yu Dekhtyar, R. Reisfeld, Marina Romanova*, T. Saraidarov, I. Surkova

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

Lead sulfide (PbS) nanoparticles embedded in a thin-film matrix of zirconium oxide (ZrO2), ZrO2:PbS nanofilms, were studied for application in nanodosimetry of ionizing radiation. Readout of the delivered dose was carried out by measurements of photoelectron emission (PE) current from ZrO2:PbS nanofilms. PE emission was excited by UV photons having energy of 4.6–6.2 eV. First, the nanofilms were irradiated with non-ionizing UV radiation used as a model of ionizing radiation in order to extract exposure-dependent signal from PE spectra of ZrO2:PbS nanofilms. It was found that exposure-dependent signal is provided by PbS nanoparticles and it is the decrease of the increment of PE current calculated in energy range of 4.9–5.5 eV. The extracted signal was further analyzed by irradiating ZrO2:PbS nanofilms with 9 MeV electron radiation. Second degree polynomial relationship was observed between the decrease of the increment of PE spectra calculated in the energy range of 4.9–5.5 eV and dose of electron radiation in the range of 0–10 Gy. Error of dose measurement was calculated for each delivered dose. Error of dose measurement decreases from 65% to 11% when the delivered dose increases from 2 Gy to 5 Gy and doesn’t exceed 11% in the dose range of 5–10 Gy. Changes in PE spectra of ZrO2:PbS nanofilms under influence of electron radiation suggest that the nanofilms have potential to be used in nanodosimetry of ionizing radiation; however, further adjustment of the method is required to reduce dose measurement error.

Original languageEnglish
Title of host publication1st European Biomedical Engineering Conference for Young Investigators - ENCY2015
EditorsAkos Jobbagy
PublisherSpringer Verlag
Pages56-59
Number of pages4
ISBN (Print)9789812875723
DOIs
StatePublished - 2015
Event1st European Biomedical Engineering Conference for Young Investigators, ENCY2015 - Budapest, Hungary
Duration: 28 May 201530 May 2015

Publication series

NameIFMBE Proceedings
Volume50
ISSN (Print)1680-0737

Conference

Conference1st European Biomedical Engineering Conference for Young Investigators, ENCY2015
Country/TerritoryHungary
CityBudapest
Period28/05/1530/05/15

Bibliographical note

Publisher Copyright:
© Springer Science+Business Media Singapore 2015.

Keywords

  • Dosimetry
  • Electron radiation
  • Lead sulfide
  • Photoelectron emission
  • Ultraviolet radiation

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