@article{oai:tobunken.repo.nii.ac.jp:00003930,
 author = {犬塚, 将英 and 早川, 泰弘 and 皿井, 舞 and 藤岡, 穣 and Masahide, INUZUKA and Yasuhiro, HAYAKAWA and Mai, SARAI and Yutaka, FIJIOKA},
 issue = {56},
 journal = {保存科学, Science for conservation},
 month = {Mar},
 note = {The statue of Shakanyorai (so-called “Asuka-daibutsu”),which is about three meters in height, is enshrined as the principal image of Asuka-dera temple located in Asuka village, Nara prefecture. According to historical sources, the statue is considered to have
been made by Tori Busshi at the beginning of the 7th century. It is an important statue because it is considered to be the first Joroku Buddha in Japan.However,there are various opinions as to which part of the statue is original because it was damaged by fire in the early Kamakura period.
 On June 16th and 17th, 2016, research of the preserved state and production techniques of Asuka-daibutsu was conducted (research representative,Prof.Fujioka of Osaka University). In this project,the authors conducted investigation of materials on the surface of the statue by using a portable X-ray diffraction analyzer (Riken Keiki Co.,Ltd.,XRDF),which was introduced to the Tokyo National Research Institute for Cultural Properties in 2015.
 Scaffolding was constructed around the statue and measurements were taken at 10 points on the surface of the head and body. Together with the 3 measured points on a fragment considered to have been a part of Asuka-daibutsu,the number of measured points was 13 in total.
 In the present study, the ratio of the intensities of signals due to copper (I)oxide and copper (II)oxide was calculated from the data obtained by the portable X-ray diffraction analyzer from each measurement point.The results are compared with the viewpoint of art history to discuss which part of the statue is original.},
 pages = {65--75},
 title = {〔報告〕可搬型Ｘ線回折分析装置を用いた銅造釈迦如来坐像（飛鳥大仏）の材質調査},
 year = {2017}
}