Issue |
Radioprotection
Volume 56, Number 2, April-June 2021
|
|
---|---|---|
Page(s) | 93 - 101 | |
DOI | https://doi.org/10.1051/radiopro/2021002 | |
Published online | 11 March 2021 |
Article
Evaluation of neutron spectra and dose equivalent from a Varian 2100C/D Medical Linear Accelerator: Monte Carlo simulation and a literature review
University of Birjand, Physics Department, Faculty of Sciences,
9717851367
Birjand, Iran
* Corresponding author: k.karimi@birjand.ac.ir
Received:
11
March
2020
Accepted:
10
February
2021
In this study was carried out a review according to experimental and Monte Carlo studies in the literature on the neutron production from 18 MV, Varian 2100C/D linac. The effects of these neutrons were investigated on the total fluence, the energy spectra, and the dose equivalent. These factors were calculated as a function of depth and the radiation field size by simulation of linac head using of MCNPX2.6.0 code. The neutron strength was found equal to 1.23 × 1012 nGy−1.The results showed that with increasing the field size from 5 × 5 to 40 × 40 cm2, the neutron fluence and dose equivalent in the water phantom rose to the maximum value for 25 × 25 cm2 field (3.05 × 107 ncm−2Gy−1 and 3.14 mSvGy−1 respectively) and then decreased with increasing the field size. According to the results, the magnetite-steel, ordinary, and limonite-steel concrete walls significantly increased the neutron dose equivalent for about 27.4%, 17.2%, and 13.5%, respectively.
Key words: Varian 2100C/D Linac / neutron fluence / radiation field size / Monte Carlo simulation
© SFRP, 2021
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.