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本文采用程控Ge(Li)γ谱仪为探测器,以~(64)Cu为标准,用相对法测显了比较常见的42种元素的84种核素在23MeV轫致辐射照射下的光核反应产额,求得了这些核素特征性较高的能峰在下述条件下的分析灵敏度,即:靶面上γ剂量率为9.4×10~6R/min,照射1小时,半衰期≤1小时的核素,最低可探测的放射性取100cpm;半衰期>1小时的核素取10cpm,探测器灵敏体积136cm~3,样品距探头外表面3.5mm。所测元素按可能达到的最高灵敏度可分为
In this paper, using the program-controlled Ge (Li) γ spectrometer as the detector, the photonuclear reaction of 84 nuclides of the more common 42 elements under 23MeV Bremsstrahlung radiation The yield sensitivity of these nuclides with high characteristic peaks was obtained under the following conditions: γ dose rate of 9.4 × 10 ~ 6R / min on the target surface, 1 hour of irradiation, half-life of 1 hour The minimum detectable radioactivity was 100 cpm; the nuclide with a half-life> 1 hour was taken as 10 cpm; the sensitive volume of the detector was 136 cm -3; and the sample was 3.5 mm from the outer surface of the probe. Measured elements by the highest possible sensitivity can be divided into