| 查看: 359 | 回复: 2 | |||
dingzhimin木虫 (正式写手)
|
[交流]
【求助】材料表征 已有2人参与
|
| EDX是材料表针中什么的缩写呀？ |
回复此楼» 猜你喜欢
求助共晶分子筛的电镜图分析，有偿
已经有1人回复
-
中南大学化学化工学院招收电池储能、理论计算方向博士生
已经有16人回复
-
物理化学论文润色/翻译怎么收费?
已经有179人回复
-
风电环氧领域
已经有3人回复
-
请问哪里可以代烧带压力的炉子？
已经有6人回复
-
关于合成MIL-125的求助
已经有0人回复
-
双非本硕光催化方向想读博，请各位老师看看我！
已经有2人回复
-
瑞典林雪平大学范立洲课题组现招聘博士后、岗位制博士生
已经有0人回复
-
中国科大仿生界面材料科学全国重点实验室戴懿涛研究员/江雷院士团队招聘科研助理
已经有0人回复
-
中国科大仿生界面材料科学全国重点实验室戴懿涛研究员/江雷院士团队招聘科研助理
已经有0人回复
-
寻求物理化学学报最新的投稿模板！
已经有4人回复
» 本主题相关商家推荐: (我也要在这里推广)
aust_jhe
至尊木虫 (著名写手)
- C-EPI: 1
- 应助: 62 (初中生)
- 金币: 17354.5
- 红花: 9
- 帖子: 1192
- 在线: 209.6小时
- 虫号: 430372
- 注册: 2007-08-05
- 性别: GG
- 专业: 催化化学
★ ★ ★
小木虫(金币+0.5):给个红包，谢谢回帖交流
zhangwengui330(金币+2):谢谢应助！！ 2010-05-21 21:40:18
小木虫(金币+0.5):给个红包，谢谢回帖交流
zhangwengui330(金币+2):谢谢应助！！ 2010-05-21 21:40:18
|
Energy-dispersive X-ray spectroscopy Energy dispersive X-ray spectroscopy (EDS or EDX) is an analytical technique used for the elemental analysis or chemical characterization of a sample. It is one of the variants of X-ray fluorescence spectroscopy which relies on the investigation of a sample through interactions between electromagnetic radiation and matter, analyzing X-rays emitted by the matter in response to being hit with charged particles. Its characterization capabilities are due in large part to the fundamental principle that each element has a unique atomic structure allowing X-rays that are characteristic of an element's atomic structure to be identified uniquely from one another. To stimulate the emission of characteristic X-rays from a specimen, a high-energy beam of charged particles such as electrons or protons (see PIXE), or a beam of X-rays, is focused into the sample being studied. At rest, an atom within the sample contains ground state (or unexcited) electrons in discrete energy levels or electron shells bound to the nucleus. The incident beam may excite an electron in an inner shell, ejecting it from the shell while creating an electron hole where the electron was. An electron from an outer, higher-energy shell then fills the hole, and the difference in energy between the higher-energy shell and the lower energy shell may be released in the form of an X-ray. The number and energy of the X-rays emitted from a specimen can be measured by an energy dispersive spectrometer. As the energy of the X-rays are characteristic of the difference in energy between the two shells, and of the atomic structure of the element from which they were emitted, this allows the elemental composition of the specimen to be measured. |
2楼2010-05-21 21:17:36
dingzhimin
木虫 (正式写手)
- 应助: 0 (幼儿园)
- 金币: 1984.7
- 散金: 220
- 红花: 1
- 帖子: 848
- 在线: 106.5小时
- 虫号: 773518
- 注册: 2009-05-18
- 专业: 无机材料化学
3楼2010-05-22 07:46:03
