| 单词 | ion beam |
| 释义 | > as lemmasion beam ion beam n. a current of ions moving in a fixed direction. ΘΚΠ the world > matter > physics > atomic physics > ion > [noun] > current of ions ion beam1930 1928 Math. Proc. Cambr. Philos. Soc. 24 457 The secondary emission falls off for high current densities of the primary positive ion beam.] 1930 Jrnl. Franklin Inst. 209 9 The ion beam struck no solid material until well down in the brass channel. 1951 Jrnl. Brit. Interplanetary Soc. 10 253 The acceleration of a space ship by an ion beam seems to offer no particular difficulties. 2007 T. Friend Third Domain vii. 205 The instrument fires ion beams at the crystal with such precision it can ‘blast a small number of atoms off any targeted part of a zircon's surface’. < as lemmas |
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