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[求助]
求助一段话的翻译哈，谢谢
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| 正电子（positron）对于微缺陷的探测是极其灵敏的，这是正电子湮没的优点之一。热化正电子的德布罗意波长为几十埃，可以把正电子想象成直径为几十倍于晶格常数的球形波包，在湮没 （annihilation） 以前它的平均扩散长度为100-200nm，这样在湮没前它要扫过10E8（埃的立方）的体积，其中可能包含107-108个离子（原子），如果其中有一个空位，正电子就有可能被空位捕获。 |
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dd99835
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柠檬树: 金币+10, 翻译EPI+1, ★★★★★最佳答案, 谢谢啊 2013-08-05 19:59:06
柠檬树: 金币+10, 翻译EPI+1, ★★★★★最佳答案, 谢谢啊 2013-08-05 19:59:06
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Positron is extremely sensitive for the detection of micro-defects. it is one of the advantages of the positron annihilation. The de Broglie wavelength of the heating positron is several angstroms, and it can be imagined as a spherical wave packet with the diameter several times lattice constant. Its average diffusion length is 100-200 nm before annihilation. So, it must sweep 10E8 (cubic angstroms) in volume before annihilation, which may contain 107-108 of ion (atomic). If there is a space, the positron is likely to be caught. 请参考，有问题我们交流一下 |
2楼2013-08-05 12:33:41
andrewzhang
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| Positrons are extremely sensitive to detect the micro-defects, which is an advantage brought by its annihilation. The de Broglie wavelength of heated positrons would be normally tens angstroms. The positrons could be considered as a wave sphere with a diameter of several tens times important than the lattice constant of the material, and their average diffusion length could reach 100 to 200 nm before their annihilation. Therefore, before the annihilation, a positron could sweep a volume of 10E8 angstrom cube, that usually contains 107 - 108 ions or atoms. Hardly a vacancy was detected when the positron could be captured by it. |
3楼2013-08-05 16:10:36
4楼2013-08-05 19:58:51