collision cross section 碰撞横截面
Xenon is a very heavy element, and thus has a larger cross section for collision with a WIMP.
氙气是一个非常沉重的元素，因而具有更大的跨越与懦夫相撞一节。
Moreover, the average collision cross-section between a slow electron and a neutral particle is measured at several different temperatures using both the interferometer and the transmission methods.
本文将条纹干涉仪与透射仪联合使用，测定了在某些温度下慢电子与中性粒子的平均碰撞截面。
The obtained integral cross section decreased quickly at low collision energy and then became flat, which reflected the general feature of such exothermic reactions.
计算得到的反应截面在碰撞能量很低时下降很快，然后变得比较平坦，其变化趋势与实验测量的结果相吻合，呈现出强放热反应的基本特征。
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