target n. 靶子,标的;目标;(嘲笑等的)对象;笑柄 (for); (储蓄,贸易等的)定额,指标;小羊的颈胸肉;【物理学】(X射线管中的)对阴极;【测】标杆,标板;【铁路】圆板信号机;〔古语〕小圆盾。 a target area 轰炸目标地区。 a target ship 靶舰。 a target buster 〔美俚〕打飞靶的人。 target practice 打靶,射击演习。 hit a target 达到定额[指标]。 one's target for tonight 〔英军俚〕女友。
The reflector can increase the neutron flux obviously and the main processes of the neutron yield in reflector are spallation reaction induced by energetic hadrons and ( n , 2n ) reaction . when the moderator height is equal to the distance between the upper part and the lower part of the split target , the total neutron flux of the split target will be higher by 20 . 1 % than that of the integral one . secondly , the high - energy neutron escaping from the target will enter into the moderator and be slowed down 得到经水慢化器慢化后,中子通量在慢化器厚度与高度方向上的分布;比较了水与液态氢的慢化能力以及中子在水、液态氢、液态甲烷这三种慢化器慢化后的能谱;在csns的靶站设计中,引出慢中子的导管不完全位于慢化器中子引出面的法线方向上,因此进一步计算了中子通量角分布。