 |
 |
 |
 |
 |
 |
||
 |
 |
 |
 |
 |
| 5 | 1/1 | 返回列表 |
| 查看: 756 | 回復: 3 | ||
| 本帖產(chǎn)生 1 個 翻譯EPI ，點擊這里進行查看 | ||
| 當前只顯示滿足指定條件的回帖，點擊這里查看本話題的所有回帖 | ||
[求助]
求助一段話的翻譯哈，謝謝
|
||
| 正電子（positron）對于微缺陷的探測是極其靈敏的，這是正電子湮沒的優(yōu)點之一。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個離子（原子），如果其中有一個空位，正電子就有可能被空位捕獲。 |
回復此樓» 猜你喜歡
0856，材料與化工321分求調(diào)劑
已經(jīng)有6人回復
-
0703化學求調(diào)劑，各位老師看看我�。�！
已經(jīng)有5人回復
-
266分，求材料冶金能源化工等調(diào)劑
已經(jīng)有7人回復
-
張芳銘-中國農(nóng)業(yè)大學-環(huán)境工程專碩-298
已經(jīng)有3人回復
-
070300化學求調(diào)劑
已經(jīng)有4人回復
-
086000調(diào)劑
已經(jīng)有3人回復
-
320分，材料與化工專業(yè)，求調(diào)劑
已經(jīng)有4人回復
-
265求調(diào)劑
已經(jīng)有7人回復
-
295材料工程專碩求調(diào)劑
已經(jīng)有4人回復
-
高溫高壓反應求助
已經(jīng)有4人回復
4樓2013-08-05 19:58:51
dd99835
木蟲 (正式寫手)
- 翻譯EPI: 9
- 應助: 6 (幼兒園)
- 金幣: 3261.6
- 散金: 92
- 紅花: 3
- 帖子: 861
- 在線: 175.4小時
- 蟲號: 1026818
- 注冊: 2010-05-23
- 專業(yè): 光譜分析
【答案】應助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★
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
|
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. 請參考，有問題我們交流一下 |
2樓2013-08-05 12:33:41
andrewzhang
鐵桿木蟲 (著名寫手)
超級無敵加菲
- 翻譯EPI: 119
- 應助: 225 (大學生)
- 金幣: 6404.9
- 散金: 410
- 紅花: 45
- 帖子: 1428
- 在線: 485小時
- 蟲號: 923911
- 注冊: 2009-12-09
- 性別: GG
- 專業(yè): 玻璃材料
【答案】應助回帖
| 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
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 083000學碩274求調(diào)劑 +4 | Li李魚 2026-03-26 | 4/200 |
|
|---|---|---|---|---|
|
[考研] 一志愿211院校 344分 東北農(nóng)業(yè)大學生物學學碩，求調(diào)劑 +5 | 丶風雪夜歸人丶 2026-03-26 | 8/400 |
|
|
|
[考研] 322求調(diào)劑 +3 | 宋明欣 2026-03-27 | 3/150 |
|
|
|
[考研] 289求調(diào)劑 +7 | 新時代材料 2026-03-27 | 7/350 |
|
|
|
[考研] 286求調(diào)劑 +8 | PolarBear11 2026-03-26 | 8/400 |
|
|
|
[考研] 材料292調(diào)劑 +12 | 橘頌思美人 2026-03-23 | 12/600 |
|
|
|
[考研] 308求調(diào)劑 +7 | 墨墨漠 2026-03-25 | 7/350 |
|
|
|
[考研] 0703一志愿9，初試成績：338，四六級已過，有科研經(jīng)歷，求調(diào)劑！ +3 | Zuhui0306 2026-03-25 | 3/150 |
|
|
|
[材料工程] 一志愿C9材料與化工專業(yè)總分300求調(diào)劑 +7 | 曼111 2026-03-24 | 8/400 |
|
|
|
[考研] 322求調(diào)劑 +4 | 我真的很想學習 2026-03-23 | 4/200 |
|
|
|
[考研] 一志愿北京化工大學材料與化工 264分各科過A區(qū)國家線 +10 | 哈哈157349 2026-03-21 | 10/500 |
|
|
|
[考研] 334求調(diào)劑 +3 | 雨清天晴 2026-03-21 | 3/150 |
|
|
|
[考研] 359求調(diào)劑 +4 | 王了個楠 2026-03-25 | 4/200 |
|
|
|
[考研] 351求調(diào)劑 +4 | 麥克阿磊 2026-03-24 | 4/200 |
|
|
|
[考研] 286求調(diào)劑 +13 | Faune 2026-03-21 | 13/650 |
|
|
|
[考研] 材料科學與工程 317求調(diào)劑 +4 | JKSOIID 2026-03-26 | 4/200 |
|
|
|
[考研] 一志愿上海交大生物與醫(yī)藥專碩324分，求調(diào)劑 +6 | jiajunX 2026-03-22 | 6/300 |
|
|
|
[考研] 求調(diào)劑 +6 | 研研，接電話 2026-03-24 | 7/350 |
|
|
|
[考研] 材料/農(nóng)業(yè)專業(yè)，07/08開頭均可，過線就行 +3 | 呵唔哦豁 2026-03-23 | 4/200 |
|
|
|
[考研] 一志愿北京化工大學070300 學碩336求調(diào)劑 +5 | vv迷 2026-03-21 | 8/400 |
|