科学家们知道：只有在中子撞击原子的原子核时，中子才可能处于游离状态。这种碰撞会改变原子核的运动轨迹。
Scientists know that a neutron is loose only when the neutron hits the nucleus of an atom. The collision changes the path of the nucleus.
这架望远镜被命名为“冰立方”，其工作原理是：当一个微中子撞击冰中的水分子原子时，望远镜就会探测这些罕见的场合中产生的闪光。
Called IceCube, it will work by detecting the flashes of light generated on those rare occasions when a neutrino hits one of the atoms in a molecule of water in the ice.
同时还需要足够多的、可裂变的原子核用于中子进行撞击，换句话说，需要一个临界质量。
There also need to be enough fissionable atoms about for the neutrons to bumpinto—in other words, a critical mass.
足够多的中子就会引发进一步的裂变—不是逃走，要么撞击原子，要么被没有裂开的原子吸收—演变成自动维持的过程。
When enough of these neutronsproduce further fissions—rather than escaping, bouncing off or being absorbedby atoms that do not split apart—the process becomes self-sustaining.
撞击会生成两种拥有117个质子的同位素，其中一种元素有176个中子，而另一种元素有177个中子。
The collision spit out neutrons to create two isotopes of an element with 117 protons, one with 176 neutrons and the other with 177.
但有时宇宙射线会撞击氮原子，赋予它一个额外的中子。
But sometimes a cosmic ray will collide with a nitrogen atom, giving it an extra neutron.
一个撞击铀235原子的中子，释放出一些γ，和一些中子，创造出2个裂变碎片,那它们自己会有出现的分布。
A neutron striking a uranium 235 atom, releasing some gammas and some neutrons, creating two fission fragments which themselves have a distribution of occurrence.
在核反应堆芯，自由中子连续撞击轴原子，从而产生大量热量。
In the core, uranium atoms are bombarded with free neutrons producing immense heat.
氮16是来自堆芯的高速中子在周围的冷却水中撞击氧原子的时候产生的。
It is made when speeding neutrons from the reactor's core hit oxygen in the surrounding cooling water.
中子在撞击到发生器内部的靶材上的离子的碰撞中产生。
Neutrons are generated from a collision of ions impinging on a target in the generator.
中子在撞击到发生器内部的靶材上的离子的碰撞中产生。
Neutrons are generated from a collision of ions impinging on a target in the generator.
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