잠시만 기다려 주세요. 로딩중입니다.

Detection of U-235 Fission Fragments by the Solid State Track Recorder Using Cellulose Nitrate

원자력학회지 1970년 2권 4호 p.223 ~ 228
Song Kwang-Suk, 이상수,
소속 상세정보
 ( Song Kwang-Suk ) - Atomic Energy Research Institute Physics Division
이상수 ( Lee Sang-Soo ) - Office of Atomic Energy

Abstract

Cellurose nitrate 薄膜을 利用한 固體核檢出器(SSTR)를 +하였으며 U-235의 核分裂片檢出에 利用한 結果 그 特殊한 長點이 確認되었다. Cellurose nitrate 薄膜과 U-235의 核分裂源과의 距離는 2㎜였고, U-235의 核分裂反應을 일으키기 위하여 TRIGA MARK Ⅱ 原子爐에서 熱中性子를 照射 시켰으며 照射된 Cellurose nitrate 薄膜 5-N NaOH 溶液에 etching 하였다. Etched track의 直徑은 etching 時間, etchant의 濃度 및 그 溫度에 따라서 增大하나, 本實驗에서는 室溫에서 適切한 條件이 確立되었다. 測定된 track의 直徑分布는 hystogram으로 表示하였으며, 이 hystogram 은 核分裂片의 質量分布의 saddle 型과 恰似한 形態를 가지고 있다. 또한 水銀上에서 floating 方法에 依하여 Cellurose nitrate 薄膜을 만드는 方法과 U-235의 核分裂源의 薄膜을 製造하는 方法이 상세히 記術되었다.
A special design of the solid state track recorder or SSTR using cellulose nitrate was developed for detection of fission fragments of U-235. The cellulose nitrate film of the detector is 2mm apart from the fission source which is thin layer of uranyl nitrate (87 a enrichment of U-235) suspended in cellulose nitrate. The detector is then exposed to thermal neutron flux for induced nuclear fission, and then the film was etched in 5-N NaOH solution. The diameter of a track increased as the etching time and tempera­ture and concentration of the etchant are increased since etch-ing is a usual chemical reaction, however, in the present experiment the optimum conditions were found for a given room temperature. The hystogram of track diameter as measured under a microscope shows the distribution is of the typical saddle shape, which is familiar in fission physics, yet correct correlatiop among these saddle shapes are not derived. Also in this paper, detailed technique of preparing cellulose nitrate detector film on mercury pool and thin film of uranyl nitrate fission source are described.

키워드

원문 및 링크아웃 정보

등재저널 정보