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一、引言 由于氟化锂-聚四氟乙烯[以下用LiF-(C_2F_4)_n表示]剂量元件能做得较薄并有一定的柔软性,适于人体端部(如手指)的β剂量测量。JR-101型LiF-(C_2F_4)_n剂量元件含30％的LiF(Mg,Ti)和70％的聚四氟乙烯,经热压、烧结成型。剂量元件的现有产品规格为直径10毫米、厚0.73毫米(质量厚度为120毫克/厘米~2)的圆片。本文研究了同样工艺条件制备的直径相同的三种厚度LiF-(C_2F_4)_nβ剂量元件
I. INTRODUCTION As lithium fluoride-polytetrafluoroethylene (hereinafter referred to as LiF- (C 2 F 4) _n) dosage elements can be made thinner and have a certain degree of flexibility suitable for beta dose measurement at the end of the human body (such as a finger) . JR-101 type LiF- (C_2F_4) _n dosage unit contains 30% LiF (Mg, Ti) and 70% polytetrafluoroethylene. The existing product specifications for the dosing element are discs with a diameter of 10 mm and a thickness of 0.73 mm (mass thickness of 120 mg / cm2). In this paper, the same diameter LiF- (C_2F_4) _nβ dosage unit with the same diameter