Journal of Radiation Research and Radiation Proces ›› 2015, Vol. 33 ›› Issue (3): 30501-030501.doi: 10.11889/j.1000-3436.2015.rrj.33.030501

• RADIATION DOSIMETRY • Previous Articles     Next Articles

Error analysis of dosimetry by fingernail electron paramagnetic resonance

ZHANG Tengda  ZHANG Wenyi  ZHANG Haiying   RUAN Shuzhou  JIAO Ling   

  1. (Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College,
    Tianjin 300192, China)
  • Received:2015-03-30 Revised:2015-04-24 Online:2015-06-20 Published:2015-05-12

Abstract:

The aim is to find errors of electron paramagnetic resonance dosimetry in fingernails. By comparing the EPR intensity of irradiated and unirradiated fingernail samples with/without dehydration, influences of water content on EPR measurements were investigated. The samples irradiated at 0, 1, 2, 3, 5 Gy were measured after dehydration to search the dose-response relationship. The BKG intensity of fingernails for 5 different fingers on one individual was measured. The experimental results showed that the signal intensity of samples dehydrated was higher than that without dehydration for both the irradiated and unirradiated samples, and the base line was flatter. The dose-response relationship was still disordered. The BKG intensity of fingernails for 5 different fingers was quite different. The biggest difference among experimental groups was 55.89%. As described above, the radical concentration of 5 different fingers’ nails was different, and cannot be regarded as the same with that other researchers previously did. Since the water content in fingernails influences the radiation dosimetry, the procedure of dehydration should be added before measurements in future investigation.

Key words: Electron paramagnetic resonance, Radiation dosimetry, Fingernails

CLC Number: 

  • TL72,O536