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Determination of 226Ra Contamination Depth Around Phosphogypsum Pit Using In-Situ Gamma Spectrometer


The feasibility of applying multiple photopeak method (MPM) and peak to valley ratio (PVRM) method to determine Radium-226 contamination depth (226Ra hc) has been investigated. Gamma spectra in eight positions around phosphogypsum disposal pit has been measured using portable NaI(Tl) gamma spectrometer. MPM was investigated by calculating the ratio \(\left( {\mathop R\nolimits_{{609,352}} } \right)\) of 609 keV gamma line net counts to the corresponding value of 352 keV. PVRM was investigated by calculating the ratio \(\left( {\mathop Q\nolimits_{{609}} } \right)\) of net counts of 609 keV gamma line to the corresponding valley counts. 226Ra hc in the positions has been determined using traditional soil coring. It was found that, \(\mathop R\nolimits_{{609,352}}\) and \(\mathop Q\nolimits_{{609}}\) have good linear correlations with 226Ra hcTherefore, 226Ra hc can be determined by MPM and PVRM. These methods save a lot of time, costs and efforts in comparison with the traditional one.

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The authors would like to thank Prof. I. Othman, the Director General of the Atomic Energy Commission of Syria; Prof. M. S. Al-masri, the head of Protection & Safety Department and the International Atomic Energy Agency (IAEA) for the support. This paper resulted from coordinated research project supported by IAEA.

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Correspondence to Kh. Haddad.

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Haddad, K., Yousef, B., Henawi, H. et al. Determination of 226Ra Contamination Depth Around Phosphogypsum Pit Using In-Situ Gamma Spectrometer. Bull Environ Contam Toxicol 101, 279–283 (2018).

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  • 226Ra
  • Phosphogypsum
  • Contamination
  • NaI(Tl)
  • Gamma spectrometry