【摘 要】
：
88Y近似为纯EC衰变核素,包括99.8%的EC衰变和0.2%的β+衰变。主要发射能量为14keV特征X射线和898keV、1836keV的γ射线,是HPGeγ谱仪等相对测量仪器效率校准的重要核素。由于
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88Y近似为纯EC衰变核素,包括99.8%的EC衰变和0.2%的β+衰变。主要发射能量为14keV特征X射线和898keV、1836keV的γ射线,是HPGeγ谱仪等相对测量仪器效率校准的重要核素。由于88Y的特征X射线能量较高,通常的流气式正比计数器的效率比较低,不能准确测量其活度。为了提高X道的探测效率,采用高气压正比计数器探测X射线。测量了甲烷气体和氩甲烷气
88Y is approximately pure EC decay nuclide, including 99.8% EC decay and 0.2% beta decay. The main emission energy of 14keV characteristic X-ray and 898keV, 1836keV gamma rays, HPGe gamma spectrometer and other relative measurement instrument efficiency calibration of the important nuclides. Due to the high characteristic X-ray energy of the 88Y, the usual flow-through proportional counters are less efficient and can not accurately measure their activity. In order to improve the detection efficiency of X-ray, high pressure proportional counter is used to detect X-ray. Methane gas and argon gas were measured
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