The depth-dose curve depends on the inhomogeneity of the material irradiated by electron beam. (October 2019)

• Record Type: Journal Article
• Authors: Tuan, Nguyen Anh; Van Tao, Chau; Rangacharyulu, Chary
• Is Part Of: Radiation physics and chemistry. Volume 163(2019:Oct.)
• Page Start: 22
• Page End: 25
• Publication Date: 2019-10
• Subjects: electron beam -- Food irradiation -- Monte Carlo -- Depth–dose curve; Radiation chemistry -- Periodicals; Radiometry -- Periodicals; Radiation -- Periodicals; Chimie sous rayonnement -- Périodiques; 539.2
• DOI: 10.1016/j.radphyschem.2019.05.001
• Languages: English
• ISSNs: 0969-806X

Abstract

Abstract: Electron linear accelerator with average energy 9.92 ± 0.48 MeV, UELR-10-15S2, was set up and operated at the Research and Development Center for Radiation Technology, Vietnam Atomic Energy Institute, for irradiating foods and medical devices directly without X-ray converter. Inside the homogenous products, the depth-dose curve depends on electron beam energy and product density, and moreover, it also depends on the inhomogeneity of the irradiated material. In this article, the depth-dose distribution is calculated by MCNP simulation code and measured by a film dosimeter inside the inhomogeneous products. The results show that the maximum deviation of the depth-dose curve between inhomogeneous and homogeneous products with the same density is about 20%. So the area density limit for irradiating double sided on the electron beam (9.92 ± 0.48 MeV) is in the range from 6.1 to 9.7 g/cm 2 instead of 8.5 g/cm 2 in general. Highlights: Depth-dose profiles in the polypropylene samples were measured and simulated. Depth-dose profiles vary with the inhomogeneity of the material. 10 MeV electrons are suitable for two-side irradiation of samples at 6.1–9.7 g/cm 2 .