1. Stopping power and CSDA range of electrons in liquid water, LiF, CaF2, and Al2O3 from the energy gap up to 433 keV.
- Author
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Castillo-Rico, L.R., Flores-Mancera, M.A., and Massillon-JL, G.
- Subjects
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BAND gaps , *ELECTRONS , *ALGORITHMS , *LIQUIDS , *RADIATION dosimetry - Abstract
• Stopping power for low-energy electrons is calculated. • The Full Penn Algorithm has been followed. • Band gap and exciton states have been considered. • Good agreement is obtained in the limit where the Bethe Approximation is valid. Stopping powers (SP) for electrons with energies greater than 10 keV are well described through the Bethe approximation. However, for energies below, such an approach is inadequate. SP in LiF, CaF 2 and Al 2 O 3 as the luminescent materials commonly used for dosimetry study and liquid-water are scarce at energies below 10 keV. This work investigated SP and CSDA-range of electrons in in these compounds from the energy gap up to 433 keV using the full Penn algorithm. In particular, the influence of the exciton states was evaluated. The experimental optical data were selected after a rigorous evaluation process. The results indicate that the exciton states affect the SP mainly at energies below 100 eV by up to 48%, 39%, 32% and 15% for liquid-water, LiF, CaF 2 and Al 2 O 3 , respectively. Furthermore, we observed a certain relationship between the minimum excitation-energy (exciton state) and the energy at which the SP is maximum. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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