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Titlebook: Otto Hahn and the Rise of Nuclear Physics; William R. Shea Book 1983 D. Riedel Publishing Company, Dordrecht, Holland 1983 electron.elemen

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發(fā)表于 2025-3-21 19:21:51 | 只看該作者 |倒序?yàn)g覽 |閱讀模式
書目名稱Otto Hahn and the Rise of Nuclear Physics
編輯William R. Shea
視頻videohttp://file.papertrans.cn/706/705001/705001.mp4
叢書名稱The Western Ontario Series in Philosophy of Science
圖書封面Titlebook: Otto Hahn and the Rise of Nuclear Physics;  William R. Shea Book 1983 D. Riedel Publishing Company, Dordrecht, Holland 1983 electron.elemen
描述and less as the emanation unden‘ent radioactive decay, and it became motion- less after about 30 seconds. Since this process was occurring very rapidly, Hahn and Sackur marked the position of the pointer on a scale with pencil marks. As a timing device they used a metronome that beat out intervals of approximately 1. 3 seconds. This simple method enabled them to determine that the half-life of the emanations of actinium and emanium were the same. Although Giesel‘s measurements had been more precise than Debierne‘s, the name of actinium was retained since Debierne had made the discovery first. Hahn now returned to his sample of barium chloride. He soon conjectured that the radium-enriched preparations must harbor another radioactive sub- stance. The liquids resulting from fractional crystallization, which were sup- posed to contain radium only, produced two kinds of emanation. One was the long-lived emanation of radium, the other had a short life similar to the emanation produced by thorium. Hahn tried to separate this substance by adding some iron to the solutions that should have been free of radium, but to no avail. Later the reason for his failure became apparent. The element th
出版日期Book 1983
關(guān)鍵詞electron; element; fission; nuclear physics; radiation
版次1
doihttps://doi.org/10.1007/978-94-009-7133-2
isbn_softcover978-94-009-7135-6
isbn_ebook978-94-009-7133-2Series ISSN 1566-659X Series E-ISSN 2215-1974
issn_series 1566-659X
copyrightD. Riedel Publishing Company, Dordrecht, Holland 1983
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,The Evolution of Matter: Nuclear Physics, Cosmic Rays, and Robert Millikan’s Research Program,ed a series of investigations that many believed at the time would bring him the Nobel Prize. He had just been demoblized from a post that brought him into contact with the leading scientists and scientific entrepreneurs of America. Few prior research commitments weighed upon him. He returned to Chi
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The Discovery of Fission and a Nuclear Physics Paradigm, we find that the maps are worse than we might have expected. Some main features have not been mapped at all, or their shape and nature have been poorly explored. And this brings us to the general problem of how to map scientific work. When we study the history of fission we find a type of terrain —
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The Discovery of Uranium Z by Otto Hahn: The First Example of Nuclear Isomerism,ght. Whether or not that is the case with Otto Hahn’s discovery of nuclear isomerism is a matter we shall return to later. In the meantime, let us think back to the period before 1921. Together with Lise Meitner, Hahn had identified a large number of radioactive substances and had determined their p
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Nuclear Physics in Canada in the 1930s,Hahn, employing radiochemical methods, discovered a number of these radioactive substances: in particular, radiothorium (.Th), radioactinium (.Th), mesothorium 1 (.Ra), mesothorium 2 (.Ac), protactinium (.Pa), uranium Z (.Pa), and several in the active deposits. He also contributed greatly to our de
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