脉冲中子－中子测井仪
pulsed netron-netron logger
中子—中子反应
neutron-neutron re-action
中子中子碰撞
collision between neutrons
中子-中子散射
neutron neutron scattering
中子—中子甄别
Neutron-neutron discrimination
原子束准直
collimation of atomic beam
标准中子辐照设施
standard neutron irradiation facility