Misidentification of Natural and Anthropogenic Radionuclides in Scintillation-Based Screening in Fukushima, Japan

  1. Katsumi Shozugawa
  2. Mayumi Hori
  3. Tsutomu Takizawa
  4. Johnson E. Thomas
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Abstract

Gamma-ray detectors with insufficient energy resolution can misidentify naturally occurring radionuclides (NORM, such as 214 Bi and 228 Ac) as 137 Cs and 134 Cs. Since 2011, CsI(Tl) or NaI(Tl) scintillation detectors have been employed for screening radiocesium in the vicinity of the Fukushima Daiichi Nuclear Power Plant. However, these detectors are unable to reliably discriminate between NORM and radiocesium, which could result in false reports of the presence of radiocesium (Type 1 error).

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  1. Version published to 10.21203/rs.3.rs-7587464/v1 on Research Square