Electron Inelastic Mean Free Paths for LiF, CaF2 , Al2 O3 , and Liquid Water from 433 keV down to the Energy Gap

ACS Omega
Miguel Angel Flores-ManceraGuerda Massillon-Jl

Abstract

We report new calculations, which include the influence of the band gap and exciton states, of the electron inelastic mean free path (IMFP) for liquid water, LiF, CaF2, and Al2O3 from the band gap to 433 keV. Among compounds, liquid water is the most studied due to its role in radiobiological research, whereas LiF and CaF2 are the most widely used thermoluminescent dosimeters in environmental monitoring and medical and space dosimetry. Due to its sensitivity, the optically stimulated luminescent dosimeter, Al2O3, has recently begun to be used for personnel monitoring. Previous treatments have modified the integration domain to consider the indistinguishability between the incident electron and the ejected one or the bandgap energy for nonconductors but not to accommodate exciton states within the band gap, and no published IMFP data are available for CaF2. Our calculation was carried out using an electron-beam-solid-state interaction model through the relativistic full Penn algorithm. Integration limits that consider the band gap, the valence band width, and exciton interactions have been used. The results suggest that, at electron energies below 100 eV, the different choices of models for integration limits and the exciton int...Continue Reading

References

Jan 15, 1987·Physical Review. B, Condensed Matter·D R Penn
Jun 1, 2000·Proceedings of the National Academy of Sciences of the United States of America·H HayashiC Kao
Sep 5, 2003·Physics in Medicine and Biology·D EmfietzoglouM Moscovitch
Aug 25, 2004·Physical Review Letters·Frédéric MartinLéon Sanche
Aug 20, 2008·Proceedings of the National Academy of Sciences of the United States of America·Peter AbbamonteWei Ku
Aug 26, 2011·International Journal of Radiation Biology·José M Fernández-VareaNina Tilly
Mar 7, 2012·The Journal of Physical Chemistry. a·Jay D Bourke, Christopher T Chantler
Mar 6, 2018·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Hieu T Nguyen-Truong
Dec 7, 2018·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Guerda Massillon-JlJorge Kohanoff
Jun 4, 2019·Physica Medica : PM : an International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB)·Guerda Massillon-JlNahum Xicohténcatl-Hernández

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Citations

May 21, 2021·Scientific Reports·G Massillon-Jl
May 21, 2021·The Journal of Physical Chemistry. B·Nidhi Sinha, Bobby Antony

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Methods Mentioned

BETA
electron inelastic-scattering
scanning electron microscopy
transmission
X-ray
electron scattering

Software Mentioned

GEANT
PENELOPE
IMFP
FPA
Java
Monte - Carlo Simulator for Secondary Electrons ( JMONSEL )
STPP
JMONSEL

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