Assessment of Radioactive Contamination in Soil at Granite Rock Mountain Area, Nakhon Sri Thammarat Province

EasyChair Preprint 9528

Abstract

In this study, The purpose of this research were analyze the specific activity of the natural radioactive nuclide of ²²⁶Ra, ²³²Th and ⁴⁰K and to calculate the Radium equivalent activity (Ra_eq), the External hazard index (H_ex), the Gamma-absorbed dose rate (D) and the Annual external effective dose rate (E) in the 36 soil samples from at Granite Rock Mountain area,Nakhon Sri Thammarat Province by using gamma-ray spectrometer with a high purity germanium detector (HPGe). The results show that the specific activity of radioactive nuclides of ²²⁶Ra, ²³²Th and ⁴⁰K are in the range of 23.01- 328.81 Bq/kg (mean 152.84 ± 0.91 Bq/kg), 24.98 – 387.51 Bq/kg (mean 160.00 ± 0.63 Bq/kg), and 61.74 – 2268.78 Bq/kg (mean 1169.78 ± 0.67 Bq/kg). respectively. Many soil samples were higher than Thailand and the global average values. In addition, The Radium equivalent activity (Ra_eq) (mean 471.72 ± 32.31 Bq/kg), The External hazard index(H_ex) (mean 1.27± 0.09), and the gamma-absorbed dose rate (D) (mean 216.04± 14.20 nGy/h), were higher than the UNSCEAR criterion (2000).

Keyphrases: Granite Rock Mountain, High purity germanium detector (HPGe), Nakhon Sri Thammarat, Radionuclide

@booklet{EasyChair:9528,
  author    = {Sasithorn Sappayasan and Pungtip Kaewtubtim},
  title     = {Assessment of Radioactive Contamination in Soil at Granite Rock Mountain Area, Nakhon Sri Thammarat Province},
  howpublished = {EasyChair Preprint 9528},
  year      = {EasyChair, 2023}}