Quality assurance for radiation processing

Kantz, A.D.; Humpherys, K.C.

doi:10.1016/0146-5724(79)90092-x

Cited by 31 publications

(5 citation statements)

References 4 publications

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“…The PC films dyed with 3-[(4-Chloro-phenyl)-methoxymethyl]-6-methoxy-1-methyl-1H-benzo[c] [1,2]thiazine 2,2-dioxide (CPMBTD) demonstrate to be applicable as a highdose dosimeter for the radiation processing purposes. The film response to the dose is linear in the range of 0-100 kGy.…”

Section: Resultsmentioning

confidence: 98%

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Polycarbonate-based benzo-δ-sultam films for high-dose dosimetry in radiation processing

Feizi¹,

Ziaie²,

Ghandi³

2014

Radiochimica Acta

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In this work characteristics of the polycarbonate films with 20 μm in thickness containing different weight percentage of Benzo--sultam were studied for use as a high dose dosimetry system in radiation processing facilities. The sensitivity of the dosimeters and the linearity of dose-response curves were investigated under 60 Co -rays in a dose range of 0-100 kGy, and obtained results were compared with the commercial CTA and FWT film dosimeters. The results show that the absorbance at 348 nm depends linearly on the dose in the investigated dose range. The effects of pre-irradiation (shelf-life) and post-irradiation storage in dark and in indirect sunlight are also discussed. The results show that the dosimeters characteristics are stable within 1% at 25 ∘ C, 3 months after the irradiation.

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Section: Resultsmentioning

confidence: 98%

“…Plastic films have been successfully developed and used for various application of radiation processing dosimetry for over 40 years [1][2][3][4]. These consists various type of radiochromic plastic films [5][6][7][8], film dosimeters based on cellulose materials [9][10][11] and GafChromic dosimetry media [12].…”

Section: Introductionmentioning

confidence: 99%

Polycarbonate-based benzo-δ-sultam films for high-dose dosimetry in radiation processing

Feizi¹,

Ziaie²,

Ghandi³

2014

Radiochimica Acta

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“…The suitable dosimeter would be simple to use and read in radiation facilities with an acceptable accuracy and precision (Basfar et al , 2012; Widodo et al , 2019). As a result of direct radiation-induced permanent change in color of irradiated types of dyed materials without requiring chemical development or thermal amplification (Metcalfe et al , 1997), various types of radiochromic solution, gel and film dosimeters were introduced and used frequently in low-dose radiotherapy dosimetry (Rabaeh et al , 2013; Gambarini et al , 2017; Eyadeh et al , 2018; Soliman et al , 2019) and high-dose radiation applications such as sterilization, food irradiation, polymers applications and agriculture (Kantz and Humpherys, 1979; Soliman et al , 2014; Raouafi et al , 2018). The degree of coloration is proportional directly to the amount of absorbed dose, which may be read with a spectrophotometer or a simple photometer (Rabaeh et al , 2012; Aldweri et al , 2018; Soliman et al , 2018).…”

Section: Introductionmentioning

confidence: 99%

Optical evaluation of dithizone solution as a new radiochromic dosimeter

Rabaeh

Basfar

2020

PRT

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Purpose The purpose of this paper is to propose a new dithizone solution dosimeter for high radiation applications such as polymers applications and food irradiation. Design/methodology/approach Gamma-rays cell of Co-60 source with 8.4 kGy/h dose rate was used to irradiate the dithizone solutions at different irradiation temperatures. The optical measurements of unirradiated and irradiated dithizone dye solution dosimeters were performed using a UV/VIS spectrophotometer at absorption peaks of 421 and 515 nm. Findings The new dosimeter improved significantly with the increase of dithizone dye concentrations from 0.025 to 0.1 mM. The dosimeter shows a perfect pre- and post-irradiation stability after irradiation for five days. Because of irradiation temperature dependence, the dithizone solution dosimeter should be corrected under actual processing conditions. Practical implications Dosimetry is a key point in quality control of radiation processing to assure that uniform and correct radiation doses are delivered to a region of interest. Therefore, this study introduces a dithizone solution dosimeter for high-dose radiation applications such as food irradiation, polymers applications and agriculture. Originality/value Ionizing radiation interacted with the ethanol solvent, resulting in the formation of free radicals, then these free radicals interacted with the dithizone molecule and changed the dye color from yellow to orange.

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“…A 2-mil thick radiachromic film was used as the detector. 4 After exposure to one shot, the film was scanned with a microdensitometer using a resolution spot size of 0.9 x 0.02 mm. Results at different axial positions and pressures are given in Fig.…”

Section: Ion Focusing Regime Propagationmentioning

confidence: 99%