Studying Dosimetric Behavior of Orange IV Radiochromic Film for Radiation Dose Monitoring

Document Type : Original Article

Authors

1 Radiation Protection and Dosimetry Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt

2 Faculty of Science (Girls), Al-Azhar University, Cairo, Egypt

3 Radiation Protection and Dosimetry Department, National Center for Radiation Research and Technology (NCRRT). Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt

Abstract

A THIN plastic film consisting of poly vinyl alcohol (PVA) and PH indicator dye, Orange IV, in the presence of chloral hydrate was prepared and formed by simple casting technique. Studying its dosimetric behavior was executed to approve the possibility of its usage in dose monitoring, the data obtained reveal that the intensity of the absorption band at 448 nm was decreased with the increase of the absorbed dose in a systematic manner that covers a range that reaches up to 100 kGy. On visual investigation, the film changes its color from yellow to red passing through the orange color upon exposure to gamma rays. The response of the prepared films depends on both chloral hydrate and dye concentrations. Increase in recording values was noticed on increasing the concentrations of both the chloral .hydrate and dye. Although the film has a good stability in relative humidity ranging from 10% to 50% , correction should be done out of this addressed range. The film also has excellent stability before and after irradiation in different storage environments.

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