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用光核反应产生的１１Ｃ和１８Ｆ作为指示剂，从实验上确定２００ＭｅＶ电子束轫致辐射的最佳转换靶（钨片）厚度为４．２ｍｍ（１８Ｆ）或５．２ｍｍ（１１Ｃ），角分布半宽度为３°．研究了在转换靶与样品靶相对距离改变时该轫致辐射在辐照室不同高度处光通量的变化，并指出利用它们开展凝聚态物理和辐射化学研究时应注意辐射热、样品的辐射变色和被活化等有关问题
Using 11C and 18F produced by photonuclear reaction as an indicator, the optimal conversion target (tungsten plate) of 200MeV electron beam is determined experimentally to be 4.2mm (18F) or 5.2mm (11C) in angular distribution half Width is 3 °. The change of luminous flux of the bremsstrahlung at different height of the irradiation chamber when the relative distance between the target and sample target is changed is studied. It is pointed out that when using them to study condensed matter physics and radiation chemistry, the radiation heat, Be activated and other related issues