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lth1116

金虫 (小有名气)

[求助] 有关激活能这句话怎么理解?

激活能在百度百科和一些文章中看到这么一句话:激活能越小,失效的物理过程越容易进行;激活能越大,加速系数越大,越容易被加速而失效。
感觉前半句和后半句是不是有点矛盾?前半句应该好理解,后半句应该怎么理解?
例如:扩散激活能,如果扩散激活能越小,越容易达到这个能量要求,也就越容易扩散,那完成整个扩散的时间不是越短吗?加速系数和激活能有什么关系?
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