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- Title
32P measurement and dose conversion factor evaluation of activated human hair by criticality accident.
- Authors
Yoon, Seokwon; Ha, Wi-Ho; Park, Seyoung; Shin, Seongwook; Yoo, Jaeryong; Park, Sunhoo; Lee, Seung-Sook
- Abstract
In order to conduct dose assessment of victims in criticality accidents, a method of fast neutron capture-activated 32P measurement of hair in which samples are treated by a chemical and analytical procedure that takes 9 h and measurement is conducted by liquid scintillation counting is presented. To validate this measurement method, hair samples spiked with a 32P reference source were measured and the results analysed and the optimal sample mass and detection efficiency were determined. To verify the correlation between 32P-specific activity and absorbed dose for spectra with two neutron mean energies, samples collected from three normal individuals were irradiated at various neutron energies and irradiation times using the MC50 Cyclotron of the Korea Institute of Radiological and Medical Sciences. The 32P-specific activity trend of the irradiated hair agreed well with the absorbed doses. Based on the results, dose conversion factors, which were 0.67±0.15 and 0.59±0.06 Gy (Bq g−1)−1 at neutron mean energies of 2.33 and 5.36 MeV, respectively, were calculated as a guide for medical treatment of criticality accident victims.
- Subjects
NEUTRON capture; LIQUID scintillation counting; NEUTRONS spectra; CYCLOTRONS; IRRADIATION; NEUTRON temperature
- Publication
Radiation Protection Dosimetry, 2014, Vol 161, Issue 1-4, p134
- ISSN
0144-8420
- Publication type
Article
- DOI
10.1093/rpd/ncu007