Open Access 
Downloads
Abstract
In the environmental radioactivity analyzing methods using gamma-ray spectrometry, the natural activities of radionuclides were required to be higher than the minimum detectable activity (MDA). To reduce MDA, one of the popular methods is to improve the ability of reducing the background radiation of the gamma-ray spectrometry. In this work, we designed the shielding configuration with 5 cm lead and 2 mm copper (thickness of walls and top). The MDAs of gamma-ray spectrometer were 2.6–4.24 times times for 40K (1460.8 keV), 232Th (208Tl- 2614.5 keV) and 238U (214Pb- 352 keV; 214Bi- 609.3 keV, 214Bi- 1764.5 keV). In the other hand, MDA for 238U with this shielding configuration is smaller than the activity of 238U inside surface soils in Vietnam. These results showed that the gamma spectrometer with NaI(Tl) detector and this shielding configuration was suitable for measurements activity of 238U in the environmental samples.
Issue: Vol 1 No T4 (2017)
Page No.: 56-62
Published: Dec 31, 2017
Section: Original Research
DOI: https://doi.org/10.32508/stdjns.v1iT4.496
Copyright: The Authors. This is an open access article distributed under the terms of the Creative Commons Attribution License CC-BY 4.0., which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Download PDF = 121 times
Total = 121 times
Most read articles by the same author(s)
- Kien Thach Trung Vo, Tam Duc Hoang, Nguyen Hoang Vo, Chuong Dinh Huynh, Thanh Thien Tran, Tao Van Chau, Investigation of the liquid density using Gamma scattering technique , Science & Technology Development Journal: Natural Sciences: Vol 1 No T1 (2017)
- Chuong Dinh Huynh, Nguyen Hoang Vo, Trang Thi Ngoc Le, Linh Thi Truc Nguyen, Tuyet Kim Tran, Thanh Thien Tran, The effect of the diameter of the detector collimator on saturation thickness in gamma scattering measurement , Science & Technology Development Journal: Natural Sciences: Vol 1 No T3 (2017)
- Nguyen Hoang Vo, Thanh Thien Tran, Quy Duc Bui, Minh Quoc Nguyen, Duy Hoang To, Son Thai Lo, Tao Van Chau, Determination of the interface between insoluble environments using gamma scattering technique , Science & Technology Development Journal: Natural Sciences: Vol 1 No T4 (2017)
- Nguyen Hoang Vo, Thanh Thien Tran, Bao Huu Nguyen, Thanh Nguyen The Cao, Tao Van Chau, A new approach to process gamma scattering spectra for aluminum materials , Science & Technology Development Journal: Natural Sciences: Vol 2 No 4 (2018)
