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| 本帖產(chǎn)生 1 個(gè) 翻譯EPI ，點(diǎn)擊這里進(jìn)行查看 | |||
[求助]
求助一段話的翻譯哈，謝謝
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| 正電子（positron）對(duì)于微缺陷的探測是極其靈敏的，這是正電子湮沒的優(yōu)點(diǎn)之一。熱化正電子的德布羅意波長為幾十埃，可以把正電子想象成直徑為幾十倍于晶格常數(shù)的球形波包，在湮沒 （annihilation） 以前它的平均擴(kuò)散長度為100-200nm，這樣在湮沒前它要掃過10E8（埃的立方）的體積，其中可能包含107-108個(gè)離子（原子），如果其中有一個(gè)空位，正電子就有可能被空位捕獲。 |
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dd99835
木蟲 (正式寫手)
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【答案】應(yīng)助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★
檸檬樹: 金幣+10, 翻譯EPI+1, ★★★★★最佳答案, 謝謝啊 2013-08-05 19:59:06
檸檬樹: 金幣+10, 翻譯EPI+1, ★★★★★最佳答案, 謝謝啊 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. 請(qǐng)參考，有問題我們交流一下 |
2樓2013-08-05 12:33:41
andrewzhang
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【答案】應(yīng)助回帖
| 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樓2013-08-05 16:10:36
4樓2013-08-05 19:58:51
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