@article{oai:repo.qst.go.jp:00049599,
 author = {藤井, 健太郎 and 横谷, 明徳 and 藤井 健太郎 and 横谷 明徳},
 journal = {AIP Conference Proceedings},
 month = {Jan},
 note = {We investigated the initial process of DNA strand breakage induced by ionizing radiation by recording XANES spectra of hydrated deoxyribose (dR) films before and after K-shell ionization of oxygen. The experiments were performed 
on beamline BL23SU at SPring-8, Japan. The hydrated dR films were prepared by exposing the cooled dR film surface to water vapor. The XANES spectra were then obtained by measuring the sample drain current. The soft X-ray irradiation treatment led to an increase in the intensity of the s*(C=O) peak (around 532 eV) and a decrease in the intensity of the s*(C–O) peak around 538 eV). Furthermore, a characteristic peak was observed at around 534–536 eV in the hydrated dR film after irradiation. This peak, which was ascribed to a newly formed carboxyl group, was not observed in the XANES 
spectrum of the dry dR film after irradiation. This carboxyl group was considered to originate from the reaction of a nearby water molecule with the carbonyl group produced by the direct ionization of dR. This structure may
be formed at the strand-break termini of DNA after radiation damage. Therefore, waters of hydration may play a protective role against irreparable 
strand breakage.},
 title = {XANES spectral changes of hydrated deoxyribose induced by  K-shell ionization of oxygen},
 volume = {2054},
 year = {2019}
}