Author:
Yamamoto Seiichi,Yabe Takuya,Hirano Yoshiyuki,Kataoka Jun
Abstract
Abstract
Reactive hydroxyl radicals (·OH) play important roles
in the biological effects of radiation exposure or radiation
therapy, and the distribution of ·OH in water during
irradiation is of interest to researchers. However, real-time
·OH distribution measurement during irradiation has so far not
been achieved due to the difficulty of detecting ·OH. To make
these distribution measurements possible, we attempted the imaging
of light emitted from luminol water during irradiation with
low-energy X-rays. Imaging of the light emitted from luminol water
was conducted using a cooled charge-coupled device (CCD) camera
during X-ray irradiation to luminol water at lower energy than the
Cherenkov-light threshold. The light emission of luminol water was
25 times higher than that of water, and clear images of light
distributions were measured for the luminol water. By carrying out
the imaging of luminol water with the addition of a radical
scavenger to the luminol water, we could confirm that the emitted
light was from ·OH produced in water. With this addition of
the radical scavenger, the light intensity decreased as the weight
of the scavenger increased. With these results, we confirmed that
the detected light distribution in luminol water could be attributed
to the ·OH produced by the X-ray irradiation.
Subject
Mathematical Physics,Instrumentation