กัมมันตภาพจำเพาะเรเดียม-226 ในน้ำจากแหล่งน้ำพุร้อนและบ่อน้ำตื้นละแวกใกล้เคียงของจังหวัดสุราษฎร์ธานี (Specific Activity of Ra-226 in Water From Hot Springs and Nearby Shallow Wells in Suratthani Province)

Abstract

This work aims to study specific activity of Radium-226 in water samples from hot springs and nearby shallow wells in Suratthani Province. Totally, 86 samples from hot springs and 25 samples from shallow wells water samples from 10 sites, 8 districts were collected and examined. Radium in water sample was absorbed by an absorbing media and the specific activity of Radium-226 was analyzed using a low background HPGe Gamma ray spectrometer. Results show that the specific activity of Ra-226 in the hot spring and nearby shallow well water samples are ranged from 102-5,022 (mean 1,855±185) mBq/L and ND-158 (mean 57±36) mBq/L, respectively. Apparently, 80 samples of hot spring have the Ra-226 content exceeding 185 mBq/L, which is the maximum contaminant level proposed by US EPA.