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Auger electrons emitted from hollow atoms in vacuum

真空中空心原子发射的俄歇电子

基本信息

批准号：
15540387
负责人：
KANAI Yasuyuki
金额：
$ 2.5万
依托单位：
The Institute of Physical and Chemical Research
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2006
项目状态：
已结题

项目摘要

1. We have produced hollow atoms (ions) with the interaction between a few keV/u C5+, N6+, O7+ ions and surfaces of capillaries in a thin metallic (Ni and Au) foil.2. We have confirmed that the hollow atoms (ions) were extracted in vacuum by measuring (1) coincidence measurements between X-rays and charge states and (2) high resolution soft X-rays.3. We have observed Auger electrons emitted from the de-excitation processes of hollow atoms (ions) in vacuum by the zero-degree electron spectroscopy4. Observed K Auger spectra qualitatively show same features for different projectiles ; C5+, N6+, and 07+.5. Observed K Auger spectra qualitatively show same features for different materials of metallic foil.6. We have identified one excited state (1s2s2p 4P), which was produced by the decay processes of hollow atoms in vacuum, from its energy and lifetime without any coincidence technique.7. Identified state was predicted by the previous X-ray measurements in coincidence with charge states.8. With insulator materials, we observed a beam guiding effect, which was due to a charging up on the inner surface of capillaries.9. Even under the beam guiding conditions with the insulator capillary, the hollow atoms (ions) may be produced by the multi electron captures from the inner surface of the capillary.

1. 我们用少量的keV/u C5+， N6+， O7+离子与薄金属（Ni和Au）箔的毛细血管表面相互作用产生了空心原子（离子）。我们通过测量(1)x射线与电荷态之间的符合测量和(2)高分辨率软x射线证实了中空原子（离子）是在真空中提取的。我们用零度电子能谱观察了真空中空心原子（离子）退激过程中发出的俄歇电子。观测到的K俄歇谱定性地显示出不同弹丸的相同特征；C5+, N6+，和07+。观察到的K俄歇谱定性地显示了不同金属箔材料的相同特征。在没有任何巧合技术的情况下，我们从真空中空心原子的衰变过程中产生的能量和寿命中确定了一个激发态（1s2s2p 4P）。确定的状态是由先前的x射线测量预测的，与电荷状态一致。对于绝缘体材料，我们观察到一种光束引导效应，这是由于毛细血管内表面的充电引起的。即使在具有绝缘体毛细管的导束条件下，毛细管内表面的多个电子捕获也可能产生空心原子（离子）。