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anonymuncule

金虫 (小有名气)

[求助] 什么是charged-up effect

小弟在看ESEM资料时遇到了这段话“The positively charged gas ions are attracted to the negatively biased specimen and offset charge-up effects.”不清楚'charged-up effects '是什么现象。
前辈们能否给指点一下,不甚感激。
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anonymuncule

金虫 (小有名气)

绝缘体或半导体由于持续地向外发射光电子,会导致样品的‘充电现象’,通常情况下,这一现象会被空间电荷中和,因此会在样品表面形成一个稳定的势场,这个势场对出射的光电子会产生一个阻滞作用,导致测得的光电子能量偏低,则相应算出的电子束缚能偏高,这应该就是'charged-up effect'.
2楼2012-02-22 16:31:05
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