■ Students involved

Kwon Choi (kwon.choi84@gmail.com)

Changuk Koo (koocu00@gmail.com)

Jeonghun Oh (ojh626@snu.ac.kr)

■ Description
  When emergency accident occurs related with radiation and nuclear power, workers have personal dosimeteron their body. However, people who live near the region of radiation emergency have no personal dosimeter.

  Dicentric analysis, translocation analysis, PCC analysis, and MN analysis are widely used biological method toquantify DNA aberration caused by irradiated dose from accidents. However, Analysis of sample generally takes several days.

  Electron paramagnetic resonance spectroscopy is a method for studying materials with unpaired electrons. Thebasic concepts of EPR are analogous to those of nuclear magnetic resonance, but it is electron spins that areexcited instead of the spins of atomic nuclei. EPR spectroscopy is only method to measure free-radicals directly.

There are few EPR spectrometers for dosimetry in radiation safety institution. EPR spectroscopy can measureirradiated dose within 1 hour from sample. But, the most devices use extracted tooth or in-vitro samples in SouthKorea. Therefore, we are developing the EPR spectrometer for tooth dosimetry since 2015 funded by NuclearSafety and Security Commission (NSSC). Our groups have focused on tooth dosimetry with principle of EPRspectroscopy. We aim to complete construction of EPR spectroscopy and establishment of dose-response curveuntil 2018 with following goals (1) Sensitivity < 1 Gy (2) processing rate 10-20 persons/hour (3) transportable device.

Prof. Hiroshi Hirata is the adviser who is leading scientist of international EPR society and MRI group ofHokkaido University. RPLab and Prof. Hiroshi Hirata have a close cooperation with each other. Prof. Harold M.Swartz (Dartmouth EPR center) is leading scientist and pioneer in EPR spectroscopy and biomedicalapplication. Prof. Harold M. Swartz and his group is also our honorable close collaborator.