A natural radioactivity assessment from Trincomalee to Kokkilai coastal bands in Sri Lanka

期刊论文
发表日期：

2025年12月5日

查看全文

D. S. Ranasinghe,
J. D. Y. I. Rangina,
O. Jayawickrama,
M. B. Rathnayaka,
P. Mahawatte,
M. R. Lamabadusuriya

摘要

Thirty-six sand samples collected along the northeast coastal strip in Sri Lanka were analyzed using gamma-ray spectrometry. ²³²Th, ²²⁶Ra, and ⁴⁰K specific activities ranged from < MDL (Minimum Detection Limit) of each radionuclide to 2106 ± 47 Bq kg^− 1 (average 470 ± 3 Bq kg^− 1), 937 ± 20 Bq kg^− 1 (average 230 ± 2 Bq kg^− 1), and 345 ± 157 Bq kg^− 1 (average 152 ± 6 Bq kg^− 1), respectively. Annual effective dose rate (AEDR) ranged from 0.0079 ± 0.0008 mSv y^− 1 to 2.1 ± 0.04 mSv y^− 1. 10 locations in Pulmoddai, Kuchchaveli, and Arisimale regions exceeded the global AEDR.