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磁场聚焦β谱仪是测量原子核β和γ射线能谱的主要仪器之一。在确定低能原子核能级的特性工作上以及在放射性同位素的应用方面,它是非常有用的。作为一种射线测量工具,近代的磁场聚焦β谱仪的发展趋向于追求高度的能量分辨率和透射率。不过,由于磁场安排形成的电子光学系统的象差,往往不容易在两方面同时达到完善的程度。例如,双聚焦β谱仪有很好的能量分辨率,但是在透射率方面并不比平面聚焦的β谱仪
Magnetic field focusing β spectrometer is to measure the nucleus β and γ-ray energy spectrum of the main instruments. It is very useful in determining the behavior of low-energy nuclear energy levels and in the application of radioisotopes. As a kind of ray measurement tool, the development of modern magnetic field focusing β-spectrometer tends to pursue a high degree of energy resolution and transmittance. However, the aberration of the electro-optical system formed by the magnetic field arrangement is often not easily achieved at the same time in both aspects. For example, the dual-focus beta spectrometer has good energy resolution, but the beta spectrometer, which is no more transmissive than the planar one