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为了达到稳定的γ能谱测量,必须向γ射线探测器提供一个稳定的参考信号。在国产的FD-121型γ能谱测井仪和其它类型的γ能谱仪中,采用了~(137)Cs源作为γ能谱的参考信号源。~(137)Cs的半衰期为30.174年,所幅射的γ射线能量为0.661MeV。采用~(137)Cs源自稳技术的主要缺点是:能量为0.661MeV的~(137)Cs的γ谱峰容易与能量为0.609Mev的~(214)Bi的γ
In order to achieve stable gamma spectrometry measurements, a stable reference signal must be provided to the gamma ray detector. In the domestic FD-121 γ-ray spectrometer and other types of γ-ray spectrometer, a ~ (137) Cs source is used as a reference source for the γ-ray spectrum. The half-life of ~ (137) Cs was 30.174 years, and the radiated γ-ray energy was 0.661MeV. The main disadvantage of using 137 Cs source stabilization technology is that γ-ray peak of 137 Cs with energy of 0.661MeV is easy to react with ~ (137) Cs with energy of 0.609Mev