IN-SITU GAMMA-RAY SPECTROMETRY FOR RADIOACTIVITY ANALYSIS OF SOIL USING NaI(Tl) AND LaBr3(Ce) DETECTORS. Issue 3 (3rd July 2019)

• Record Type: Journal Article
• Authors: Lee, Jun-Ho; Byun, Jong-In
• Is Part Of: Radiation protection dosimetry. Volume 187:Issue 3(2019)
• Page Start: 300
• Page End: 309
• Publication Date: 2019-07-03
• Subjects: Radiation dosimetry -- Periodicals; Radiation -- Safety measures -- Periodicals; 363.1799
• DOI: 10.1093/rpd/ncz165
• Languages: English
• ISSNs: 0144-8420

Abstract

Abstract: In this study, the full energy peak count rates to radioactivity conversion factors of 3″Ø × 3″ NaI(Tl) and 2″Ø × 2″ LaBr3 (Ce) detectors for radioactivity analysis in the soil were determined on site using a semi-empirical method with point-like gamma-ray sources. To validate the conversion factors derived for the detectors, in-situ gamma-ray measurements were performed in wide open fields with almost flat surface and compared with the sampling analysis for the radioactivity of U-series, Th-series, and 40 K in the soil. As a result, radioactivity concentrations of 40 K, 208 Tl and 214 Bi by in-situ and laboratory measurements agreed well with each other within 5%, and the MDAs for artificial radionuclides were estimated under the condition of fresh deposition considering a radiation emergency situation.