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.
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Poly(allyl diglycol carbonate), PADC, has been recognized as the most sensitive Etched Track Detector, ETD,. A series of FT-IR spectrometric studies has been carried out to understand the latent track structure in exposed to gamma ray, X-ray, 28 MeV electron, proton and heavy ions. Based on these experiments, we found that the number of electrons which passed through a certain repeat unit of PADC is the most important parameter to express the detection threshold of etch pit formation [1].
In the present study, irradiation effects of UV photon with a wave length of 222 nm are examined [2]. The number density of ether decreases with increasing the photon fluence while that of carbonyl decrease above a critical fluence of 3.0×1019 photons/cm2 (Figure 1). The decarboxylation with releasing CO or CO2 gasses is also observed. The spatial distribution of UV defects are discussed using conventional track overlapping model to elucidate the two steps damage formation process [3]. The result expresses that continuous damages are never expected during photon exposures.
References:
[1] T. Kusumoto et al., JPS. Conf. Proc. 11, 010001 (2016).
[2] A. Sakamoto et al., Review of Graduate School of Maritime Sciences, 7, 87 (2010).
[3] T. Yamauchi, Raidat. Meas. 36, 73 (2003).
会議概要(会議名, 開催地, 会期, 主催者等)
The Ionizing Radiation and Polymers symposium (IRAP2018)