...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Review of Scientific Instruments >High‐temperature proportional counter and its application to resonance–electron Mössbauer spectroscopy
【24h】

High‐temperature proportional counter and its application to resonance–electron Mössbauer spectroscopy

机译：高温比例计数器及其在共振电子穆斯堡尔光谱中的应用

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The operation of a proportional counter designed for resonance–electron Mössbauer spectroscopy measurement at high temperatures up to 900 °C has been investigated. In order to avoid insulation difficulties due to electric leakage on the surfaces of heated insulators, the counter is carefully constructed so that the sensitive volume of the counter can be warmed up while keeping the insulators at room temperature; all insulating materials between the anode and cathodes are located outside the electric furnace in the counter system. The counter operation is influenced by thermal electrons emitted from the cathode material; the maximum working temperature is about 800 °C when an a‐Fe foil is mounted as a cathode while operation at 900 °C is possible without the sample. 57Fe Mössbauer spectra for surface layers (∼1000 Å) have been sucessfully obtained for samples of Fe3C, Fe2O3, and a Fe. Chemical changes of the sample surfaces have been observed at temperatures greater than 600 °C by the measurements. The high‐temperature counter provides us with a new method to observe directly surface phenomena at high temperatures. Some features of the counter system are described.
机译：已经研究了设计用于在高达900°C的高温下进行共振Mössbauer光谱测量的比例计数器的操作。为了避免因加热的绝缘子表面漏电而造成绝缘困难，计数器的结构应经过精心设计，以便在将绝缘子保持在室温下的同时可以对计数器的敏感体积进行加热。阳极和阴极之间的所有绝缘材料都位于计数系统的电炉外部。反操作受阴极材料发出的热电子影响；反之亦然。当将a-Fe箔片作为阴极安装时，最高工作温度约为800°C，而无需样品就可以在900°C下运行。对于Fe3C，Fe2O3和Fe的样品，已经成功获得了表面层（〜1000Å）的57FeMössbauer光谱。通过测量，可以在高于600°C的温度下观察到样品表面的化学变化。高温计数器为我们提供了一种直接观察高温下表面现象的新方法。描述了计数器系统的一些功能。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号