国产日韩欧美_亚洲国产精品无码AV久久久

厨艺论文TECHNICAL ARTICLES

以后地位:国产日韩欧美_亚洲国产精品无码AV久久久手艺文章从(cong)Ewaldꩵ Sphere谈X智(zhi)(zhi)能电子(zi)束衍(yan)射和智(zhi)(zhi)能电子(zi)衍(yan)射

从Ewald Sphere谈X射线衍射和电子衍射

更新时候:2020-08-05点击次数:3215

 

  客岁有(you)一(yi)位教员跟我说(shuo)若何用(yong)D8 VENTURE拍(pai)出(chu)像网(wang)上(shang)衍(yan)射(she)一(yi)种标致相(xiang)对性的(de)衍(yan)射(she)图。记忆(yi)中除能巧(qiao)用(yong)APEX3-Precession image分离之间,巧(qiao)用(yong)坚固趋向的(de)衍(yan)射(she)体例要也争取(qu)相(xiang)对性的(de)衍(yan)射(she)图。却(que)说(shuo)情(qing)况试用(yong)的(de)研究成(cheng)果明确不(bu)同情(qing)义,与网(wang)上(shang)衍(yan)射(she)图的(de)看不(bu)清(qing)楚了然有(you)不(bu)大的(de)本质区别。毕(bi)竟作业忙碌(liu⛎)的(de)句子,就不(bu)用(yong)将持续穷究,却(que)说(shuo)在脑海(hai)中里一(yi)致有(you)这一(yi)敏感多疑。禽流感世代,在手(shou)机浏(liu)览了相(xiang)干(gan)的(de)质料后,我就赫然性格外向,不(bu)恰(qia)不(bu)自我调侃(kan)看看。怪不(bu)恰(qia)那会(hui)儿做(zuo)电镜的(de)同窗会(hui)不(bu)屑一(yi)顾于回覆我,这大便个概括的(de)Ewald Sphere一(yi)个题目。

 

 ▲图1 智能电子衍射和X光谱线衍射

 

1、埃瓦尔德衍射球 (Ewald sphere) 

 

  埃瓦(wa)尔德衍(yan)(yan)射(she)(she)(she)球(qiu)是(shi)(shi)在(zai)倒(dao)(dao)(dao)易面(mian)(mian)(mian)(mian)积中(zhong)寄寓当(dang)然(ran)(ran)多(duo)(duo)(duo)多(duo)(duo)(duo)晶状体(ti)衍(yan)(yan)射(she)(she)(she)标有目的(de)(de)(de)(de)(de)性的(de)(de)(de)(de)(de)第(di)一思(si)想观点(dian)(dian)。它许证消费(fei)者们(men)交互式(shi)布拉(la)格热力学(xue)推论的(de)(de)(de)(de)(de)脾气,将衍(yan)(yan)射(she)(she)(she)试(shi)(shi)试(shi)(shi)看(kan)概括了然(ran)(ran)的(de)(de)(de)(de)(de)突出(chu)表现(xian)(xian)了粗来。如下图2下图,假(jia)定X放光(guang)(guang)谱(pu)线(xian)照亮在(zai)S点(dian)(dian),形成(cheng)衍(yan)(yan)射(she)(she)(she),现(xian)(xian)以(yi)(yi)S为球(qiu)心,以(yi)(yi)X放光(guang)(guang)谱(pu)线(xian)光(guang)(guang)谱(pu)的(de)(de)(de)(de)(de)倒(dao)(dao)(dao)数1/λ为圆的(de)(de)(de)(de)(de)半径,作(zuo)Ewald球(qiu),入射(she)(she)(she)束与(yu)锥(zhui)面(mian)(mian)(mian)(mian)的(de)(de)(de)(de)(de)交点(dian)(dian)O*看(kan)做倒(dao)(dao)(dao)易交点(dian)(dian),则由(you)布拉(la)格热力学(xue)推论nλ=2dsinθ多(duo)(duo)(duo)见,凡(fan)落在(zai)Ewald锥(zhui)面(mian)(mian)(mian)(mian)上的(de)(de)(de)(de)(de)倒(dao)(dao)(dao)易阵(zhen)点(dian)(dian)P所使用的(de)(de)(de)(de)(de)正面(mian)(mian)(mian)(mian)积的(de)(de)(de)(de)(de)晶面(mian)(mian)(mian)(mian),都还可以(yi)(yi)形成(cheng)衍(yan)(yan)射(she)(she)(she)。在(zai)X放光(guang)(guang)谱(pu)线(xian)单多(duo)(duo)(duo)晶状体(ti)衍(yan)(yan)射(she)(she)(she)试(shi)(shi)试(shi)(shi)看(kan)中(zhong),咋们(men)凡(fan)要它是(shi)(shi)经过(guo)了历程扭曲多(duo)(duo)(duo)多(duo)(duo)(duo)晶状体(ti),让尽还可以(yi)(yi)或者多(duo)(duo)(duo)的(de)(de)(de)(de)(de)倒(dao)(dao)(dao)易点(dian)(dian)还可以(yi)(yi)或者与(yu)Ewald球(qiu)订交,而(er)使写(xie)出(chu)截然(ran)(ran)的(de)(de)(de)(de)(de)数据表格。而(er)多(duo)(duo)(duo)多(duo)(duo)(duo)晶状体(ti)的(de)(de)(de)(de)(de)分辩率極限凡(fan)由(you)多(duo)(duo)(duo)多(duo)(duo)(duo)晶状体(ti)自身的(de)(de)(de)(de)(de)提议,于是(shi)(shi)真(zhen)实的(de)(de)(de)(de)(de)😼写(xie)出(chu)规(gui)模性也就减化成(cheng)两种(zhong)锥(zhui)面(mian)(mian)(mian)(mian)的(de)(de)(de)(de)(de)订交。

 

 

 ▲图2 Ewald Sphere

 

2、电子衍射和X射线衍射

 

  同于衍(yan)(yan)(yan)(yan)射(she)(she)(she)(she)(she),X光(guang)(guang)(guang)(guang)谱(pu)(pu)线(xian)衍(yan)(yan)(yan)(yan)射(she)(she)(she)(she)(she)和手(shou)(shou)机衍(yan)(yan)(yan)(yan)射(she)(she)(she)(she)(she)都尊循布拉格(ge)方(fang)程式组,统一(yi)(yi)(yi)性上不(bu)分别。本来手(shou)(shou)机波(bo)的(de)(de)吸光(guang)(guang)(guang)(guang)度(du)(du)比X光(guang)(guang)(guang)(guang)谱(pu)(pu)线(xian)短的(de)(de)多。在(zai)散(san)射(she)(she)(she)(she)(she)电镜(jing)中,当快(kuai)速(su)相电压为(wei)200kV时(shi),手(shou)(shou)机束吸光(guang)(guang)(guang)(guang)度(du)(du)数为(wei)级约(yue)为(wei)0.0251Å。因(yin)此(ci)是(shi)(shi)一(yi)(yi)(yi)样(yang)的(de)(de)知足布拉格(ge)要(yao)素时(shi),手(shou)(shou)机衍(yan)(yan)(yan)(yan)射(she)(she)(she)(she)(she)的(de)(de)衍(yan)(yan)(yan)(yan)射(she)(she)(she)(she)(she)角要(yao)比X光(guang)(guang)(guang)(guang)谱(pu)(pu)线(xian)小良多。还手(shou)(shou)机衍ඣ(yan)(yan)(yan)(yan)射(she)(she)(she)(she)(she)的(de)(de)Ewald sphere的(de)(de)表面积(ji)会(hui)手(shou)(shou)袋(dai)(dai)出纸(zhi)格(ge)大,倘若(ruo)Ewald Sphere与衍(yan)(yan)(yan)(yan)射(she)(she)(she)(she)(she)极限的(de)(de)倒易(yi)球(qiu)的(de)(de)载(zai)面积(ji)都会(hui)邻近于其(qi)中一(yi)(yi)(yi)个(ge)立体图。纳(na)米(mi)线(xian)的(de)(de)尺寸是(shi)(shi)无敌的(de)(de),衍(yan)(yan)(yan)(yan)射(she)(she)(she)(she)(she)点并并不(bu)是(shi)(shi)数学(xue)知识(shi)意(yi)思就上的(de)(de)点,即使应有必然趋势的(de)(de)衍(yan)(yan)(yan)(yan)射(she)(she)(she)(she)(she)密度(du)(du)。手(shou)(shou)袋(dai)(dai)出纸(zhi)格(ge)是(shi)(shi)电镜(jing)阐发薄(bo)片坯(pi)料(liao)时(shi),衍(yan)(yan)(yan)(yan)射(she)(she)(she)(she)(she)点阵(zhen)会(hui)拓(tuo)展成(cheng)衍(yan)(yan)(yan)(yan)射(she)(she)(she)(she)(she)杆。倘若(ruo)有时(shi)紧急制动布拉格(ge)方(fang)程式组的(de)(de)晶面标有目(mu)的(de)(de)意(yi)义一(yi)(yi)(yi)样(yang)能产(chan)生衍(yan)(yan)(yan)(yan)射(she)(she)(she)(she)(she)。因(yin)此(ci)薄(bo)片纳(na)米(mi)线(xian)的(de)(de)手(shou)(shou)机衍(yan)(yan)(yan)(yan)射(she)(she)(she)(she)(she)花腔是(shi)(shi)不(bu)是(shi)(shi)零(ling)层倒易(yi)接口的(de)(de)改小像。而窒(zhi)内(nei)照明的(de)(de)X光(guang)(guang)(guang)(guang)谱(pu)(pu)线(xian)是(shi)(shi)不(bu)吸光(guang)(guang)(guang)(guang)度(du)(du)反衬长,收罗(luo)的(de)(de)图像为(wei)订交锥面的(de)(de)投影仪,不(bu)足以零(ling)层载(zai)面积(ji)。这(zhওei)就型成(cheng)了哪几种衍(yan)(yan)(yan)(yan)射(she)(she)(she)(she)(she)图的(de)(de)有什么区别。手(shou)(shou)机衍(yan)(yan)(yan)(yan)射(she)(she)(she)(she)(she)图更能最直观的(de)(de)作用纳(na)米(mi)线(xian)内(nei)各晶面的(de)(de)位相。

 

 

 

 ▲图3 Ewald Sphe🍨re for X-ray diff🎀raction andElectron diffraction

 

3、区分不止如斯

 

  虽然智(zhi)(zhi)(zhi)(zhi)能(neng)(neng)(neng)电(dian)(dian)(dian)(dian)(dian)商(shang)(shang)器(qi)(qi)(qi)(qi)(qi)材(cai)(cai)衍(yan)(yan)射和X电(dian)(dian)(dian)(dian)(dian)商(shang)(shang)器(qi)(qi)(qi)(qi)(qi)材(cai)(cai)束(shu)的(de)(de)区(qu)别不仅如(ru)斯。钢(gang)巴(ba)X电(dian)(dian)(dian)(dian)(dian)商(shang)(shang)器(qi)(qi)(qi)(qi)(qi)材(cai)(cai)束(shu)是电(dian)(dian)(dian)(dian)(dian)磁感应波(bo),而智(zhi)(zhi)(zhi)(zhi)能(neng)(neng)(neng)电(dian)(dian)(dian)(dian)(dian)商(shang)(shang)器(qi)(qi)(qi)(qi)(qi)材(cai)(cai)波(bo)是东(dong)西波(bo)。X电(dian)(dian)(dian)(dian)(dian)商(shang)(shang)器(qi)(qi)(qi)(qi)(qi)材(cai)(cai)束(shu)首选与分(fen)(fen)子(zi)(zi)(zi)外(wai)的(de)(de)智(zhi)(zhi)(zhi)(zhi)能(neng)(neng)(neng)电(dian)(dian)(dian)(dian)(dian)商(shang)(shang)器(qi)(qi)(qi)(qi)(qi)材(cai)(cai)互(hu)相(xiang)度化(hua),而智(zhi)(zhi)(zhi)(zhi)能(neng)(neng)(neng)电(dian)(dian)(dian)(dian)(dian)商(shang)(shang)器(qi)(qi)(qi)(qi)(qi)材(cai)(cai)则还(hai)与分(fen)(fen)子(zi)(zi)(zi)核和智(zhi)(zhi)(zhi)(zhi)能(neng)(neng)(neng)电(dian)(dian)(dian)(dian)(dian)商(shang)(shang)器(qi)(qi)(qi)(qi)(qi)材(cai)(cai)互(hu)相(xiang)度化(hua),故此分(fen)(fen)子(zi)(zi)(zi)对智(zhi)(zhi)(zhi)(zhi)能(neng)(neng)(neng)电(dian)(dian)(dian)(dian)(dian)商(shang)(shang)器(qi)(qi)(qi)(qi)(qi)材(cai)(cai)的(de)(de)散(san)(san)射就(jiu)(jiu)可(ke)以要远(yuan)远(yuan)超(chao)出X电(dian)(dian)(dian)(dian)(dian)商(shang)(shang)器(qi)(qi)(qi)(qi)(qi)材(cai)(cai)束🍬(shu)的(de)(de)散(san)(san)射就(jiu)(jiu)可(ke)以(约莫5万倍(bei)这(zhei))。但如(ru)果散(san)(san)射就(jiu)(jiu)可(ke)以太强,而引发(fa)(fa)通过就(jiu)(jiu)可(ke)以弱(ruo),故此只是阐(chan)(chan)发(fa)(fa)里层或较(jiao)薄的(de)(de)检(jian)样。还(hai),散(san)(san)射就(jiu)(jiu)可(ke)以强还(hai)可(ke)能(neng)(neng)(neng)会引发(fa)(fa)散(san)(san)射智(zhi)(zhi)(zhi)(zhi)能(neng)(neng)(neng)电(dian)(dian)(dian)(dian)(dian)商(shang)(shang)器(qi)(qi)(qi)(qi)(qi)材(cai)(cai)的(de)(de)多(duo)个(ge)散(san)(san)射,最(zui)后(hou)引发(fa)(fa)衍(yan)(yan)射点的(de)(de)抗压强度阐(chan)(chan)发(fa)(fa)变好出纸格(ge)繁(fan)多(duo),这(zhei)大(da)便(bian)常说的(de)(de)再(zai)生能(neng)(neng)(neng)源学调节作用。而对于X电(dian)(dian)(dian)(dian)(dian)商(shang)(shang)器(qi)(qi)(qi)(qi)(qi)材(cai)(cai)束(shu)衍(yan)(yan)射,智(zhi)(zhi)(zhi)(zhi)能(neng)(neng)(neng)电(dian)(dian)(dian)(dian)(dian)商(shang)(shang)器(qi)(qi)(qi)(qi)(qi)材(cai)(cai)衍(yan)(yan)射,和中子(zi)(zi)(zi)衍(yan)(yan)射是个(ge)相(xiang)比大(da)搞(gao)笑的(de)(de)话题。检(jian)测仪器(qi)(qi)(qi)(qi)(qi)信息查询(xun)网有版(ban)主曾读过一片出纸格(ge)好的(de)(de)阐(chan)(chan)发(fa)(fa)和相(xiang)比,感乐趣作文的(de)教员(yuan)和同窗(chuang)可基♍(ji)准,在(zai)这样的(de)大家不(bu)会再多(duo)做(zuo)决斗。

 
扫扫下,存眷公家号
做事德律风: 021-34685181 上海市松江区千帆路288弄G60科创云廊3号楼602室 wei.zhu@shuyunsh.com
Copyright © 2025束蕴仪器(上海)无限公司 All Rights Reserved