scholarly journals Evaluation of low energy X-ray depth dose distribution by gafchromic film for dosimetry in food irradiation

2020 ◽  
Vol 23 (2) ◽  
pp. First
Author(s):  
Ngoc Hoang Van ◽  
Huy Viet Le ◽  
Son An Nguyen ◽  
Kume Tamikazu
Keyword(s):  
Dose Distribution ◽  
Low Energy ◽  
Food Irradiation ◽  
Radiation Processing ◽  
X Ray ◽  
Gafchromic Film ◽  
Ion Chamber ◽  
Dose Profile ◽  
Depth Dose ◽  
Depth Dose Distribution

Introduction: Dosimetry is of crucial importance in radiation processing of food. Among others, plastic film has been widely used for dosimetry in radiation therapy since its density is quite similar to the equivalent biological materials. In this study, the depth dose distribution was estimated by using gafchromic film for the purpose of dosimetry in food irradiation. Experimental: The HD-V2 gafchromic dosimetry film was employed to measure the interested dose instead of ion chamber. A stack of 19 PMMA (polymethyl methacrylate) sheets interleaved with 20 pieces of gafchromic film was made. The phantom was applied in the low energy X-ray beams (maximum 100 keV) to obtain the depth dose profile. Results: A significant correlation between absorbed doses (D) and color level or optical density (O.D.) of irradiated dosimetry films was observed. The fitting function has the form of , where a, b, c are the parameters to be fitted. The depth dose distribution in the 30 mm thickness phantom was inferred from the calibration. Conclusion: The present method and the depth dose profile to be obtained are very meaningful in the processing of foodstuffs by radiation.

Depth-dose Distribution Measurements and Calculations in an Elliptical Phantom

1983 ◽  
Vol 44 (1) ◽  
pp. 35-44
Author(s):  
J. Palfalvi ◽  
L. Koblinger ◽  
P. P. Szabo
Keyword(s):  
Dose Distribution ◽  
Depth Dose ◽  
Depth Dose Distribution

Electron Depth‐Dose Distribution Measurements in Finite Polystyrene Slabs

1972 ◽  
Vol 43 (7) ◽  
pp. 3191-3202 ◽  
Author(s):  
Marvin Rosenstein ◽  
Harvey Eisen ◽  
Joseph Silverman
Keyword(s):  
Dose Distribution ◽  
Depth Dose ◽  
Depth Dose Distribution

Simulation of Absorbed Dose Distribution In Space Materials

2004 ◽  
Vol 851 ◽  
Author(s):  
Boris A. Briskman
Keyword(s):  
Dose Distribution ◽  
Radiation Spectrum ◽  
Space Vehicle ◽  
Absorbed Dose ◽  
Numerical Characteristic ◽  
Dose Profile ◽  
Depth Dose ◽  
Space Material ◽  
Test Adequacy ◽  
Material Tests

ABSTRACTThe problems of absorbed dose distribution simulation at on-ground space material tests are discussed. Several approaches to such simulation, oriented to increase the test adequacy and economy, are analyzed. Sometimes, it is possible to use quantitative criteria of absorbed dose distribution depending on the specific space vehicle orbit. The assessment of reliable simulation of the radiation spectrum may be made, for example, by introducing a special numerical characteristic of the depth dose profile in a material - depth dose criterion. For this purpose, it is recommended to use the ratio of the exponent index of the depth dose profile (μ) to the density of the material (ρ). In the simplest form, the depth dose profile can be represented as a sum of two exponents. The first depth dose profile applies to a near-the-surface layer of 5 to 10 μm in thickness, and the second to a layer of from 10 μm up to, as a minimum, 100 μm in thickness. The reference values of μ/ρ for typical spectra of ionizing radiation are calculated.

Comparative Study of Depth Dose Distribution of Fast Neutrons Using Solid State Nuclear Track Detectors

1991 ◽  
Vol 27 (4) ◽  
pp. 202-205
Author(s):  
H. R. Moustafa ◽  
M. S. Abdel-Wahab ◽  
N. El Enany ◽  
S. El Fiki ◽  
M. A. Sharaf ◽  
...  
Keyword(s):  
Solid State ◽  
Comparative Study ◽  
Dose Distribution ◽  
Fast Neutrons ◽  
Nuclear Track Detectors ◽  
Depth Dose ◽  
Depth Dose Distribution
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