Determination of U, Th and K in Sediments and Fossil Collected from Mae Moh Mine Using Gamma-Ray Spectrometry and Neutron Activation Analysis (NAA)

Authors

  • Tidarut Vichaidid Department of Physics, Faculty of Science, King Mongkut’s University of Technology Thonburi, Bangkok 10140, Thailand.
  • Thongchai Soodprasert National Standard Radioactivity Laboratory, Office of Atoms for Peace, Bangkok 10900, Thailand.
  • Natnalin Sastri National Standard Radioactivity Laboratory, Office of Atoms for Peace, Bangkok 10900, Thailand.
  • Chutima Oopathum Rajamangala University of Technology Krungthep, Bangkok 10120, Thailand.
  • Pichet Limsuwan Department of Physics, Faculty of Science, King Mongkut’s University of Technology Thonburi, Bangkok 10140, Thailand.

Keywords:

HPGe, NAA, Gamma-spectrometry, Uranium, Thorium, Potassium, Annual Dose

Abstract

The annual environmental dose in sediment and fossil shells matrices, collected from Mae Moh mine, Lampang province, Northern Thailand has been determined by using gamma spectrometry together with neutron activation analysis technique (NAA). This analysis technique was adopted by
activating NBS standard reference materials (NBS SRM 2709: San Joaquin Soil) and sediment matrices at the same condition before measuring them at the specific time schedule. High Purity Germanium (HPGe) well type detector and spectrometer were calibrated to get efficiency ratio by reference standard sources. Most of natural radioactive elements are members of uranium, thorium and from non series nuclides, mainly potassium. The result concentration of uranium, thorium, and potassium in samples can be achieved by this technique and found to be in the range of 0.02 to 3.05 ppm, 0.04 to 11.00 ppm, and 0.01 to 1.53% respectively. The annual environmental dose is between 87-3000 mGy, depended on
type of metrics, and can be specifically calculated and used for dating around the Middle Miocene time scale.

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Published

2008-12-31

How to Cite

Tidarut Vichaidid, Thongchai Soodprasert, Natnalin Sastri, Chutima Oopathum, and Pichet Limsuwan. 2008. “Determination of U, Th and K in Sediments and Fossil Collected from Mae Moh Mine Using Gamma-Ray Spectrometry and Neutron Activation Analysis (NAA)”. Agriculture and Natural Resources 42 (5). Bangkok, Thailand:333-39. https://li01.tci-thaijo.org/index.php/anres/article/view/244616.

Issue

Vol. 42 No. 5 (2008): January-December

Section

Research Article

License

online 2452-316X print 2468-1458/Copyright © 2022. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/),
production and hosting by Kasetsart University of Research and Development Institute on behalf of Kasetsart University.