因子分析技术在铀与CO,O_2反应俄歇分析中的运用  

Application of Factor Analysis to AES Studiesof Uranium Oxidation by CO and O_2

作　　者：杨江荣[1] 蒋春丽[1] 陆雷[1] 肖红[1] 汪小琳[1] 

机构地区：[1]中国工程物理研究院,四川绵阳621900

出　　处：《核化学与放射化学》2005年第4期198-202,共5页Journal of Nuclear and Radiochemistry

摘　　要：运用因子分析技术和Multipak软件中的TFA功能对铀分别在CO和O2气氛中的俄歇谱进行了处理。分析表明,因子分析方法能有效地解决C(KLL)和U(LMM)俄歇峰中的重峰问题,并能从原始数据中剥离出纯组元;同时还清楚地表明,铀与CO在300℃作用1 h后,在其表面形成了铀的碳化物(或碳氧化物);对铀在低压氧气中的氧化反应,用因子分析技术获得了金属态和氧化态的铀元素随氧气暴露剂量的变化情况,清楚地显示了氧化膜生长的3个阶段。The Auger spectra acquired from reaction of uranium with CO, or O2 are mathematically treated with factor analysis with TFA （target factor analysis） function in MULTIPAK software. The results show that FA（factor analysis） is very useful for separating out interferences in standard elemental profiles constructed from overlapping peaks （CKLL、ULMM） and can separate pure components from original Auger data. A thin UC（UCxOy, x＋y=1） layer is present on the surface after uranium sample is treated in CO atmosphere at 300℃ for 1 h, by using FA to Auger sputter depth profile of Carbon. Chemical state depth profiles of uranium and uranium oxide as a function of oxygen dose are present when FA is used to standard Auger sputter profile data from the Auger spectra of uranium, the chemical profile of uranium oxide clearly shows that three oxidation stages present when the oxide layer grows.

关 键 词：铀 CO O2 因子分析 俄歇 

分 类 号：O614.62[理学—无机化学]