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田載植,黃善泰,都珍悅 대한방사선 방어학회 1984 방사선방어학회지 Vol.9 No.2
Cellulose nitrate의 α粒子飛跡特性, 特히 化學腐蝕條件에 따른 α 粒子의 飛跡直徑을 中心으로 硏究하였다. Cellulose nitrate의 KOH 溶液腐蝕때에는 同一한 腐蝕條件下에서 NaOH 경우보다 α 飛跡直徑이 約 3倍 크게 나타났다. 그밖에 腐蝕時間 및 粒子의 에너지에 따른 腐蝕直徑의 데이타를 얻었고, α 粒子의 照射條件이 같을 때 훌루언스率(fluence rate)이 腐蝕時間에 無關함을 알았다. A study on the characteristics of α-particle track on cellulose nitrate film was carried out with a particular emphasis on the dependence of track diameter upon chemical etching condition. The track diameters etched in KOH solution appeared to be, on average, three times larger than those etched in NaOH under the same etching condition. The relationship between the track diameters and both etching time and the energy of incident α-particles was also investigated. It is shown that the particle fluence rate is fairly independent of etching time as far as the condition of irradiation remains unchanged.
이용재,장경호,서호성,도진열,강시홍 한국센서학회 1999 센서학회지 Vol.8 No.4
We constructed an interferometer for precise measurement of the ball diameter, and measured the diameter of steel ball with a diameter of 78 mm. The interferometer was consisted of etalon to instal ball between two parallel plates and placed on the monolithic flexure to be moved parallel. The ball diameter was calculated from phase difference of one pair of signals interfered between the both sides of ball and two parallel plates, and the signals was observed by photodetectors with scanning the etalon. The results showed that the diameter of steel ball was 78.1893544 mm and measurement uncertainty of 29 nm in confidence level of 95.5 %.