Читать книгу Essentials of Nuclear Medicine Physics, Instrumentation, and Radiation Biology - Rachel A. Powsner - Страница 33

Through a process that competes with positron decay, a nucleus can combine with one of its inner orbital electrons to achieve the net effect of converting one of the protons in the nucleus into a neutron (Figure 1.18). An outer‐shell electron then fills the vacancy in the inner shell left by the captured electron. The energy lost by the “fall” of the outer‐shell electron to the inner shell isemitted as an X‐ray.

Figure 1.18 Electron capture.