neutron spectrometer
中子谱仪
中子光谱计
中子分光仪
中子频谱仪
中子谱计
中子分光计
中子[能]谱计
neutron-neutron(n-n)logging
three crystal spectrometer
neutron epithermal neutron log
neutron thermal neutron log
single crystal nickel crystal superalloy
~(241)Am-Be neutron source
~(241)Am-Be neutron source element
~(252)Cf neutron source
~(252)Cf 中子源
~(252)Cf中子源
252Cf中子源
241Am- 9Be neutron source
241Am-Be neutron source
40 Ar 39 Ar fast neutron activation dating