Characteristics of Track-Etch PN-3 Dosimeters for Alpha Particles

알파입자 부식-새김을 이용한 PN-3 선량측정기의 특성

  • Yoo, Done-Sik (Department of Physics, Queen Mary & Westfield College, University of London)
  • Published : 1990.10.01

Abstract

A method of detecting charged particles in an allyl diglycol carbonate material (PN-3) which is available, amorphous, optically clear and thermoset plastic in which nuclear particle tracks could be revealed by etching in hot NaOH solutions, has been investigated. It has been applied to the study of alpha particle tracks over an energy range of 3.17~5.49 MeV which has been obtained after having passed through several sheets of polycarbonate. The dose equivalent rate of the alpha source was calculated and the spark chamber was used in order to measure the range of alpha particles after having passed through different number of absorbers. The etching characteristics and the detection response of PN-3 have been studied as a funcion of lengths of etched tracks against the parameters of energies and of the track etching rate(V$_{T}$). The investigation of the etching process for alpha particles in the PN-3 provided the most interesting results.s.

본 논문에서는 플라스틱 검출기의 일종인 알릴 다이글리콜 카보네이트 물질 (PN-3) 에서의 하전입자의 검출 방법과 여러장의 흡수체를 통과하여 얻어진 알파 업자의 에너지 (3.17~5.49 MeV) 에 대한 알파입자 궤적의 특성을 논의하였다. 또한 등가흡수선량율을 계산하였고, 일파입자의 도달거리를 특정하기위해 섬광계수기를 사용하였다. PN-3 의 에칭특성과 검출 특성등이 여러가지 변수들로 표현되었다. 즉, 부식당한 입자궤적의 길이가 갖는 각각의 알파입자 에너지에대한 연관성등을 논의하였다. PN-3 플라스틱 선량 검출기에 기록된 알 파업자의 에칭과정에서 매우 흥미있는 결과를 얻었다.

Keywords