| 查看: 716 | 回复: 3 | |||
| 本帖产生 1 个 翻译EPI ，点击这里进行查看 | |||
[求助]
求助一段话的翻译哈，谢谢
|
|||
| 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。 |
回复此楼» 猜你喜欢
依托企业入选了国家启明计划青年人才。有无高校可以引进的。
已经有13人回复
-
AI 太可怕了，写基金时，提出想法，直接生成的文字比自己想得深远，还有科学性
已经有11人回复
-
表哥与省会女结婚，父母去帮带孩子被省会女气回家生重病了
已经有9人回复
-
同年申请2项不同项目，第1个项目里不写第2个项目的信息，可以吗
已经有10人回复
-
依托企业入选了国家启明计划青年人才。有无高校可以引进的。
已经有11人回复
dd99835
木虫 (正式写手)
- 翻译EPI: 9
- 应助: 6 (幼儿园)
- 金币: 3261.6
- 散金: 92
- 红花: 3
- 帖子: 861
- 在线: 175.4小时
- 虫号: 1026818
- 注册: 2010-05-23
- 专业: 光谱分析
【答案】应助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★
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
|
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
铁杆木虫 (著名写手)
超级无敌加菲
- 翻译EPI: 119
- 应助: 225 (大学生)
- 金币: 6404.9
- 散金: 410
- 红花: 45
- 帖子: 1428
- 在线: 485小时
- 虫号: 923911
- 注册: 2009-12-09
- 性别: GG
- 专业: 玻璃材料
【答案】应助回帖
| 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楼2013-08-05 16:10:36
4楼2013-08-05 19:58:51