利用中子轰击地层，测量由此产生的非弹性和俘获伽马射线谱。
The tool bombards the formations with neutrons and measures both the inelastic and capture gamma ray spectra that results.
原子吸收中子的过程。原子受到激发，释放俘获伽马射线。测井中用到这种效应。
The absorption of a neutron into an atom. The atom becomes energized and releases gamma rays of capture. The effect is used in well logging.
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