Readout temperature effect on the response of the genipin gel dosimeter

Bahrami, Farbod; Abtahi, Seyed Mohammad Mahdi; Sardari, Dariush; Bakhshandeh, Mohsen

doi:10.52547/ijrr.19.3.685

Cited by 4 publications

(2 citation statements)

References 31 publications

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“…[59,60] Gel matrices and film matrices presented a minimum detectable dose in the range of 0.24 to 5.0 Gy. [61,62]…”

Section: Optimized Conditionsmentioning

confidence: 99%

Carbon Dots based Tissue Equivalent Dosimeter as an Ionizing Radiation Sensor

dos Santos de Almeida,

Gomes Abegão,

Vinicius Silva Alves

et al. 2024

Chemistry A European J

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This work explores the potential of carbon dots as a fluorescent probe in the determination of heavy ions and as an electrochemical biosensor. It also discusses how carbon dots can be introduced into the Fricke solution to potentially serve as an ionizing radiation sensor. The study presents a novel tissue equivalent dosimeter carbon dots‐based as an ionizing radiation sensor. The methodology for the synthesis of Nitrogen‐doped Carbon Dots N‐CDs and the characterization of the material are described. The results show that the N‐CDs have a high sensitivity to ionizing radiation and can be used as a dosimeter for radiation detection. The study also discusses the limitations and challenges of using carbon dots as a dosimeter for ionizing radiation. Overall, this study provides valuable insights into the potential applications of carbon dots in different fields and highlights the importance of further research in this area.

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“…[59,60] Gel matrices and film matrices presented a minimum detectable dose in the range of 0.24 to 5.0 Gy. [61,62]…”

Section: Optimized Conditionsmentioning

confidence: 99%

Carbon Dots based Tissue Equivalent Dosimeter as an Ionizing Radiation Sensor

dos Santos de Almeida,

Gomes Abegão,

Vinicius Silva Alves

et al. 2024

Chemistry A European J

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“…Investigation of commercially available PRESAGE ® with leuco malachite green (LMG) dye additive indicated dose linearity in the range up to 30 Gy [ 30 ]; as well as dynamic range of genipin-based dosimeters (water, gelatin, agarose, genipin, sulfuric acid) was between 0–10 Gy. These gels showed moderate stability up to 600 h [ 31 ] and maximum dose sensitivity of 0.035 cm −1 Gy −1 at 10 °C readout temperature [ 32 ]. There are some attempts to develop theoretical model for the prediction of color change sensitivity in gels irradiated up to 100 mGy [ 33 ].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Colored Film Indicators for the Assessment of the Occasional Radiation Exposure

Kudrevičius

Adlienė

Puišo

et al. 2023

Gels

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Occupational radiation exposure monitoring is well-established in clinical or industrial environments with various different dosimeter systems. Despite the availability of many dosimetry methods and devices, a challenge with the occasional exposure registration, which may occur due to the spilling of radioactive materials or splitting of these materials in the environment, still exists, because not every individual will have an appropriate dosimeter at the time of the irradiation event. The aim of this work was to develop radiation-sensitive films—color-changing radiation indicators, which can be attached to or integrated in the textile. Polyvinyl alcohol (PVA)-based polymer hydrogels were used as a basis for fabrication of radiation indicator films. Several organic dyes (brilliant carmosine (BC), brilliant scarlet (BS), methylene red (MR), brilliant green (BG), brilliant blue (BB), methylene blue (MB) and xylenol orange (XiO)) were used as a coloring additives. Moreover, PVA films enriched with Ag nanoparticles (PVA-Ag) were investigated. In order to assess the radiation sensitivity of the produced films, experimental samples were irradiated in a linear accelerator with 6 MeV X-ray photons and the radiation sensitivity of irradiated films was evaluated using UV–Vis spectrophotometry method. The most sensitive were PVA-BB films indicating 0.4 Gy−1 sensitivity in low-dose (0–1 or 2 Gy) range. The sensitivity at higher doses was modest. These PVA-dye films were sensitive enough to detect doses up to 10 Gy and PVA-MR film indicated stable 33.3% decolorization after irradiation at this dose. It was found that the dose sensitivity of all PVA-Ag gel films varied from 0.068 to 0.11 Gy−1 and was dependent on the Ag additives concentration. Exchange of a small amount of water with ethanol or isopropanol caused the enhancement of radiation sensitivity in the films with the lowest AgNO3 concentration. Radiation-induced color change of AgPVA films varied between 30 and 40%. Performed research demonstrated the potential of colored hydrogel films in their applications as indicators for the assessment of the occasional radiation exposure.

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Preparation of polymer gel dosimeters for low gamma irradiation dose

et al. 2022

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In this study, two separate hydrogel dosimeters were prepared for low-dose measurement. The first system is based on Congo Red (CR) dye and a blend of natural polymers (gelatin/CMC) while the second system is based on 2,6-dichlorophenol indophenol (DCP) blue dye and a hybrid polymer blend (PVA/gelatin/CMC). The sensitivity of Congo red (CR)–(gelatin/CMC) gel dosimeter and 2, 6 – di choro phenol indophenols(DCP)-(PVA/gelatin/CMC) gel dosimetry systems were examined by studying the comparative results between the two different systems through the change in optical properties upon exposure to different gamma radiation doses, which showed the sensitivity of the second system (DCP)-(PVA/gelatin/CMC) to radiation is more than the first system(CR)–(gelatin/CMC) (CR) and (DCP)dyes have absorbance crest at 492 and 622 nm respectively. With the increase of the radiation dose, the decomposition of the dyes increases, and thus the color of the prepared hydrogel changes from orange to colorless in the case of (CR) dye at the dose (0–3.5 kGy) and from blue to colorless in the case (DCP) dye at the absorbed doses ranged from (0–1000 Gy). Dose-response curves, sensitivity, FTIR analysis, and the relative stability of the prepared hydrogel before and after irradiation were studied.

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Readout temperature effect on the response of the genipin gel dosimeter

Cited by 4 publications

References 31 publications

Carbon Dots based Tissue Equivalent Dosimeter as an Ionizing Radiation Sensor

Carbon Dots based Tissue Equivalent Dosimeter as an Ionizing Radiation Sensor

Investigation of Colored Film Indicators for the Assessment of the Occasional Radiation Exposure

Preparation of polymer gel dosimeters for low gamma irradiation dose

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