Citation

Bradley, D. A. and Lam, S. E. and Mat Nawi, Siti Nurasiah and Abdul Sani, S. F. and Ung, N. M. and Alzimami, K. and Khandaker, Mayeen Uddin and Moradi, Farhad and Taheri, Ali (2024) Graphite as a Skin and Epithelium Dosimeter at mammographic energies. Radiation Physics and Chemistry. p. 111543. ISSN 0969-806X

Full text not available from this repository.

Abstract

Use is made of 50 μm high purity graphite foils, investigating the potential of these in evaluation of dose in dermal and epithelial layers, measuring the thermoluminescence yield obtained as a result of irradiation at mammographic energies. In particular the effort supports the ICRU recommendation that skin dose be assessed at a skin depth 0.07 mm, equating to the uniquely mitotically active dermal layer responsible for the replenishment of skin cells. Support for the results of empirical investigation have been sought from Monte Carlo simulations using the TOPAS code. In study of x-rays generated in the 25- to 30 kVp range, the energetic electrons produced in interaction with the graphite have an approximate range of ∼7 μm, so that with a stacked graphite layer arrangement dose assessment is provided at 7 μm, 57 μm, 107 μm etc. TL yield results for the first three layers of graphite, covering nominal depths from the surface through to 150 μm, obtained on a 50 μm spatial resolution scale, show deposited dose values to be approximately flat to within throughout this depth. The indication is that for irradiations made using x-ray energies of a few tens of keV use of the present graphite layer arrangement can provide estimation of dermal and epithelial dose.

Item Type:	Article
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK9001-9401 Nuclear engineering. Atomic power
Divisions:	Faculty of Engineering (FOE)
Depositing User:	Ms Nurul Iqtiani Ahmad
Date Deposited:	04 Mar 2024 03:00
Last Modified:	04 Mar 2024 03:00
URII:	http://shdl.mmu.edu.my/id/eprint/12169

Downloads

Edit (login required)