Synopsis
Excerpt from Photo-Ionization of Cęsium by Line Absorption
There is a small surface effect which is greatest with the caesium at room temperature. Then light of all wave lengths from the ultra-violet to the visible gives an increase in electron current with a sensitivity highest in the ultra-violet, but entirely different from the photo-ionization sensitivity. This current change increases as the thermionic current is increased up to the saturation value by raising the cathode temperature, but unlike the space-charge effect there is no further increase upon exceeding the saturation temperature. These and other tests indicate that the effect can be ascribed to photo electric emission from a transparent caesium film on the quartz window.9 The photo-electric emission changes the potential of the film which in the arrangement of Figure 1 acts like an external grid on the electron emission. With higher vapor pressures the film resistance and potential change decrease. Well below 100° C. The effect is masked by the volume photo-ionization.
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Photo-Ionization of CƦsium by Line Absorption (Classic Reprint)
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Paperback. Condition: New. Print on Demand. This book details the author's findings regarding the phenomenon of photo-ionization in the laboratory. Photo-ionization is the process by which an atom gains energy and loses an electron. The author specifically focuses on the rare alkali metal, Cesium, and through experimentation, proves that lines below the series limit of Cesium are due to absorption of energy, which then produces ionization in the element. The impact of this discovery suggests that alkali molecule ions have a stability comparable to that of other molecules, such as Potassium and Sodium. The implications of this finding have implications for the broader scientific community working in the realms of chemistry and physics. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item. Seller Inventory # 9781528223836_0
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Photo-Ionization of C?sium by Line Absorption (Classic Reprint)
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PAP. Condition: New. New Book. Shipped from UK. Established seller since 2000. Seller Inventory # LX-9781528223836
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