International Journal of Science and Research (IJSR)

International Journal of Science and Research (IJSR)
Call for Papers | Fully Refereed | Open Access | Double Blind Peer Reviewed

ISSN: 2319-7064


Downloads: 113 | Views: 182

Research Paper | Nuclear Research | Sri Lanka | Volume 3 Issue 4, April 2014 | Rating: 6.7 / 10


Evaluation of Accuracy of Accumulated Dose of OB85 Gamma Irradiator

G. G. G. M. N.Hemamali | C. Kasige


Abstract: The purpose of this experiment was to evaluate the accuracy of accumulated doses used in irradiation and determination of transition timer error of sources in the OB85 Gamma Irradiator installed in Secondary Standard Dosimetry Laboratory at Atomic Energy Authority, Sri Lanka. Accumulated dose is measured using calibrated reference electrometer system (Electrometer: PTW, Model No: UNIDOS, S/No: 20567 and Ion chamber: 600cc, Model No: 2575C, S/No: 459) and compared with the calculated accumulated dose (= ref. dose rate x time) using reference dose rate and respective value of the timer of OB85. The experiment shows that, the transient time of the OB85 gamma irradiator is 1sec. The result concludes that minimum distance for accumulated dose below 1 mSv should be irradiated at 3m distance and 1mSv or above accumulated radiation doses should be irradiated at 1m distance in order to achieve accuracy at least 1 %.


Keywords: Electrometer, Ion chamber, accumulated radiation dose, Irradiator


Edition: Volume 3 Issue 4, April 2014,


Pages: 266 - 268


How to Download this Article?

Type Your Valid Email Address below to Receive the Article PDF Link


Verification Code will appear in 2 Seconds ... Wait

Top