量研学術機関リポジトリ「QST-Repository」は、国立研究開発法人 量子科学技術研究開発機構に所属する職員等が生み出した学術成果（学会誌発表論文、学会発表、研究開発報告書、特許等）を集積しインターネット上で広く公開するサービスです。 Welcome to QST-Repository where we accumulates and discloses the academic research results(Journal Publications, Conference presentation, Research and Development Report, Patent, etc.) of the members of National Institutes for Quantum Science and Technology.
Thank you very much for using our website. On the 11th of March 2019, this site was moved from our own network server to the JAIRO Cloud network server. If you previously bookmarked this site, that bookmark will no longer work. We would be grateful if you could bookmark the website again. Thank you very much for your understanding and cooperation.
A review is given for our recent studies on latent track structure formed in Poly(allyl diglycol carbonate), PADC, which has been utilized as the most sensitive etched track detector. To find the peculiar structure to unetchable tracks, we have carried out examinations with protons of which stopping power is faurly lower than that of the detection threshold of 17 eV/nm for PADC. The radiation chemical yield, G value, for loss of CH groups is fairly higher at the lower stopping powers. To estimate the primary effects of high-energy electrons,the thin PADC films were exposed to well collomated 28 MeV electrons, of which deposited energy per unit distance is about 0.03eV/nm. We found the monotonic decrease of ether bonds with the fluence as that observed for protons and heavy ions. On the contrary to this, carbonate ester bonds decreased only above the certain fluence of 1.6×10 15 electrons/㎠, in which the overlapping of electron tracks becomes significant. This indicates that the carbonate ester cam be released following the damage on neighboring ether. Such an observation is well concordant to the layered structure of the latent tracks in PADC for heavy ions.
高感度飛跡検出器PADC中に形成されるイオントラックの特徴
