Preparation of 134Cs sealed source based on WO3 adsorbent for radiometric calibration purposes

El-Gharbawy, Ahmed F.; Mostafa, M.; El-Absy, M. A.; Saad, Ebtsam A.

doi:10.21608/ejaps.2021.94364.1006

Preparation of 134Cs sealed source based on WO3 adsorbent for radiometric calibration purposes

Document Type : Original Article

Authors

¹ Radioactive Isotopes and Generators Dept., Hot Labs Center, Atomic Energy Authority, Cairo, Egypt

² Chemistry Department, Faculty of Science, Ain Shames University, Cairo, Egypt

10.21608/ejaps.2021.94364.1006

Abstract

Cesium-134 artylon sealed source based on inorganic adsorbent (as a core) was easily prepared. The sealed source was in the form of a disk constituted of two halves; base and top. Cesium-134 was adsorbed by equilibration of 134CsCl solution with WO3 inorganic adsorbent at pH 4 for 24 h at 25±1°C. Then, the liquid phase was decanted and checked for the remaining activity. Thereafter, the 134Cs-loaded WO3 was dried at 100 °C for 24 h. A definite weight the 134Cs-loaded WO3 adsorbent was placed in the central cavity of the base half-disk. Then the two half-disks were assembled using a commercial epoxy adhesive. The activity values of the sealed source were 7.81×10-2 and 7.70×10-2 Ci, calculated by using the absolute efficiency curve and DETEFF software were found to be closest at a 5 cm source-detector distance; respectively. After radiometric standardization and encapsulation, the sealed source was checked radiometrically before release to the local market for calibration purposes of radiation measurement and identification instruments.

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