放射气相色谱内流气正比计数管研制、性能研究及其应用

• 作 者: 许蓉珠 梁生柱 喻金火 仪明光
• 机 构: 原子能研究所,原子能研究所,原子能研究所,原子能研究所 北京rrrrrrrrn,北京rrrrrrrrn,北京rrrrrrrrn,北京
• 出 处: 原子能科学技术
• 发表日期: 1985年01期
• 关键词: 正比计数管 陶瓷绝缘材料 内流 铅室 ~3H 封闭式结构 坪斜 标记化合物 气相色谱 绝对测量

本工作研制的内流气正比计数管适于测定气态的低能β射线,该管耐压5000伏,坪长750伏,坪斜0.38%/100伏。每套管子有两支,有效长度为73和123毫米,内径13毫米,配有屏蔽铅室,可作比放的绝对测量。管子为封闭式结构,采用陶瓷绝缘材料,外壳用纯镍制成,两端用不锈钢过渡,内壁光洁度达?8。研究了管子在氦气、氩气和氢气作载气,二氧化碳或甲烷为计数气体,在不同流速比下的坪曲线。结果表明:氦和氩较氢气有较宽的坪长(约200伏),坪斜也较好。管子对氚

In this work, the direct flow proportional counter tube is suitable for the determination of gaseous low-energy β-rays. The tube has a withstand voltage of 5000V, a plateau of 750V and a slope of 0.38% / 100V. Each tube has two, effective length of 73 and 123 mm, an inner diameter of 13 mm, with a shielded lead chamber, can be compared to the absolute measurement. The tube is a closed structure, made of ceramic insulation material, the shell made of pure nickel, both ends of the stainless steel transition, the inner wall finish? The flat curve of tube under helium, argon and hydrogen as carrier gas, carbon dioxide or methane as counting gas and different flow velocity ratio was studied. The results show that helium and argon have a wider plateau (about 200 volts) than hydrogen, and the slope is better. Pipe to tritium