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Study of positron trapping at quantum-dot like copper particles on the surface of iron using positron annihilation induced auger electron spectroscopy.

机译：利用正电子an没诱导的螺旋电子能谱研究正电子在铁表面的量子点状铜颗粒上的俘获。

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Annihilation studies performed in bulk Fe-Cu alloy have demonstrated the trapping of positrons in quantum-dot like Cu nano-particles in Fe. This thesis presents the results of studies of sputtered surfaces of these materials using Positron annihilation-induced Auger electron spectroscopy (PAES). In PAES energetic electron emission results from Auger transitions initiated by annihilation of core electrons with positrons trapped in a surface-state. The Cu PASS intensities obtained from different films by deposition of Cu/Fe-Cu (quenched) alloy revealed that the 95% of Cu intensities come from the 0.56A of Cu/Fe-Cu (quenched) alloy. This suggests that the implanted positrons are trapped at Cu sites in the top most layer of the sample. The low Cu intensity observed in PAES measurements of the Cu-Fe (2h-aged) alloy is consistent with trapping of positrons implanted at low energies in Cu nano particles below the surface rather than at surface site.

机译：在块状Fe-Cu合金中进行的灭研究表明，正电子在量子点中像Fe中的Cu纳米粒子一样被俘获。本文介绍了使用正电子an没诱导俄歇电子能谱（PAES）研究这些材料的溅射表面的结果。在PAES中，高能电子发射是由铁原子跃迁引起的，俄歇跃迁是由核心电子with灭并以表面态捕获的正电子引发的。通过沉积Cu / Fe-Cu（淬火）合金而从不同膜获得的Cu PASS强度显示出95％的Cu强度来自0.56A的Cu / Fe-Cu（淬火）合金。这表明植入的正电子被困在样品最顶层的Cu位置。在Cu-Fe（2h时效）合金的PAES测量中观察到的低Cu强度与以低能注入的正电子在表面下方而不是表面部位的Cu纳米粒子中的俘获相一致。

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作者
Nadesalingam, Manori Prasadika.;
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The University of Texas at Arlington.;

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授予单位 The University of Texas at Arlington.;
学科 Physics Condensed Matter.
学位 M.S.
年度 2003
页码 55 p.
总页数 55
原文格式 PDF
正文语种 eng
中图分类 O49;
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1. Study Of The Surface Contamination Of Copper With The Improved Positron Annihilation-induced Auger Electron Spectrometer At Nepomuc [J] . J. Mayer, C. Hugenschmidt, K. Schreckenbach Applied Surface Science . 2008,第1期

机译：改进的正电子An灭感应俄歇电子能谱仪在Nepomuc上研究铜的表面污染
2. Effect of vacuum annealing on the surface chemistry of electrodeposited copper(I) oxide layers as probed by positron annihilation induced auger electron spectroscopy [J] . Nadesalingam MP, Mukherjee S, Somasundaram S, Langmuir: The ACS Journal of Surfaces and Colloids . 2007,第4期

机译：真空退火对电沉积氧化铜（I）层表面化学性质的影响
3. Stability of Se passivation layers on Si(001) surfaces characterized by time-of-flight positron annihilation induced Auger electron spectroscopy [J] . J. G. Zhu, M. P. Nadesalingam, A. H. Weiss, Journal of Applied Physics . 2005,第10Pt1期

机译：飞行时间正电子an灭感应俄歇电子能谱法表征Si（001）表面Se钝化层的稳定性
4. Search for Positron Trapping at Quantum-Dot Like Cu Nano Particles on the Surface of Fe Using Positron Annihilation [C] . Manori P. Nadesaiingam, S. Kim, N. G. Fazieev, International Conference on Positron Annihilation . 2004

机译：使用正电子湮灭搜索Cu纳米颗粒的量子点捕获量子点的正电子捕获
5. Study of oxide surfaces using time of flight positron annihilation induced Auger electron spectroscopy. [D] . Nadesalingam, Manori Prasadika. 2007

机译：使用飞行时间正电子an灭感应俄歇电子能谱研究氧化物表面。
6. Auger electron emission initiated by the creation of valence-band holes in graphene by positron annihilation [O] . V. A. Chirayath, V. Callewaert, A. J. Fairchild, -1

机译：通过正电子an灭在石墨烯中形成价带空穴引发俄歇电子发射
7. Positron annihilation studies of recrystallization in the subsurface zone induced by friction in magnesium—effect of the inhomogeneity on measured positron annihilation characteristics [O] . Jerzy Dryzek 2013

机译：正离子ni灭研究镁摩擦在地下引起的再结晶-不均匀性对测得的正电子an没特性的影响
8. Effect of Interstitials on the Trapping of Hydrogen in High Purity Iron as Studied by Positron Annihilation and Electron Microscopy [R] . Waber, J. T., Snead, C. L. 1985

机译：正电子湮没和电子显微镜研究间隙对高纯铁中氢的捕获效应

Study of positron trapping at quantum-dot like copper particles on the surface of iron using positron annihilation induced auger electron spectroscopy.

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