Measurement of uranium in small quantities in phosphates by use of γ-ray spectrometry and the 1001 keV peak of 234mPa

Kapsimalis, Roger; Landsberger, Sheldon; Reguigui, N.

doi:10.1007/s10967-009-0514-8

Cited by 12 publications

(2 citation statements)

References 5 publications

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“…Đầu dò HPGe cho phép định tính và định lượng các đồng vị phát bức xạ gamma có các mức năng lượng khác nhau. Do đó, đầu dò HPGe được ứng dụng trong việc kiểm tra thực phẩm (Anderson et al, 2008), phân tích kích hoạt neutron (Mauerhofer et al, 1996;Landsberger and Biegalski, 2005) và phân tích mẫu môi trường (Harbottle and Cumming, 1994;Kapsimalis et al, 2009). Giới hạn phát hiện của hệ phổ kế gamma HPGe được xác định bởi hai yếu tố: hiệu suất ghi nhận và phông bức xạ.…”

Section: Giới Thiệuunclassified

Mô phỏng hệ đầu dò gamma triệt Compton bằng phương pháp Monte Carlo

Tai¹,

Phát²,

Thanh³

et al. 2020

CTU Journal

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In this study, two simulation toolkits including Geant 4 and MCNP-CP are used to investigate the configuration of the Compton suppression spectrometer at Nuclear Research Institute. The Compton suppression system consisting of 12 bismuth germanate (BGO) scintillation crystals surrounding one HPGe detector is used to reduce background from Compton scattering. The simulation results illustrate the good suitability between response functions for point source with each radioisotope such as Moreover, the difference between the fullenergy peak efficiency of two simulation toolkits is less than 1%. This research gives the initial results to optimize the configuration of Compton suppression system and to compare with experimental data in the future.

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Section: Giới Thiệuunclassified

Mô phỏng hệ đầu dò gamma triệt Compton bằng phương pháp Monte Carlo

Tai¹,

Phát²,

Thanh³

et al. 2020

CTU Journal

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“…It is represented at different levels depending on the geological structure of the area such as the surface of the earth, rocks, water, plants and even the air and geographical conditions of each region [7]. Therefore, the radioactive levels have a different effect on human health [8,9].…”

Section: Introductionmentioning

confidence: 99%

Natural radioactivity in soil samples from selected areas in Nineveh governorate, Iraq

Alsaedi¹,

Hasan²,

Abdulhasan³

2020

Nucl. Phys. At. Energy

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The activity distribution of natural radionuclides 232 Th, 226 Ra, 40 K and 137 Cs were determined in soil samples. The samples were collected from four different regions in Nineveh governorate northwest of Iraq (Tall Kayf, Badush, Al-Hamdaniya, Hammam Al-alil) and measured by the gamma-ray spectrometry with high purity germanium (HPGe) detector with relative efficiency 50 %. The specific radioactive activity of the samples was in the range of 1.75-45.56, 8.63-43.72, 147.92-502.49 and MDL-69.32 Bq/kg, respectively, at the selected areas. The calculated hazard indices that estimate the potential radiological health risk such as radium equivalent activity (Ra eq) were in the range 40.33-122.12 Bq/kg. The absorbed dose rate in the air was also calculated for the samples and it was in the range 20.51-56.72 nGy/h. External hazard index (H ex) is in the range 0.11-0.33, internal hazard index (H in) is in the range 0.13-0.4 and gamma index was 0.32-0.89. The annual effective dose equivalent (AEDE), annual gonadal dose equivalent (AGDE), and excess lifetime cancer risk (ELCR) were also calculated and their ranges were 25.15-69.56, 151.63-396.05 and 0.09•10-3-0.24•10-3 respectively. This study showed that there is no radiation hazard to the public due to natural radionuclides in the selected areas.

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Compton suppression systems for environmental radiological analysis

Britton

2011

J Radioanal Nucl Chem

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Measurement of uranium in small quantities in phosphates by use of γ-ray spectrometry and the 1001 keV peak of 234mPa

Cited by 12 publications

References 5 publications

Mô phỏng hệ đầu dò gamma triệt Compton bằng phương pháp Monte Carlo

Mô phỏng hệ đầu dò gamma triệt Compton bằng phương pháp Monte Carlo

Natural radioactivity in soil samples from selected areas in Nineveh governorate, Iraq

Compton suppression systems for environmental radiological analysis

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