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Titlebook: Lasers and Excited States of Rare Earths; Renata Reisfeld,Christian Klixbüll Jørgensen Book 1977 Springer-Verlag Berlin Heidelberg 1977 La

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发表于 2025-3-21 19:41:27 | 显示全部楼层 |阅读模式
书目名称Lasers and Excited States of Rare Earths
编辑Renata Reisfeld,Christian Klixbüll Jørgensen
视频video
丛书名称Inorganic Chemistry Concepts
图书封面Titlebook: Lasers and Excited States of Rare Earths;  Renata Reisfeld,Christian Klixbüll Jørgensen Book 1977 Springer-Verlag Berlin Heidelberg 1977 La
描述The possibility of stimulated light emission was discussed by Einstein in 1917, eight years before the quantum-mechanical description of energy levels of many-electron systems. Though it is imperative to use samples having optical properties greatly different from the stan­ dard continuous spectrum of opaque objects ("black body" radia­ tion) it is not always necessary to restrict the study to monatomic entities. Thus, spectral lines can be obtained (in absorption and in emission) from lanthanide compounds, containing from one to thir­ teen 4f electrons going from trivalent cerium to ytterbium, that are nearly as sharp as the ones from gaseous atoms. However, the presence of adjacent atoms modifies the simple picture of an isolated electron configuration, and in particular, it is possible to pump excited levels efficiently by energy transfer from species with intense absorption bands, such as the inter-shell transitions of other lanthanides and of thallium(I), lead(II) and bismuth(III) or the electron transfer bands of the uranyl ion or other complexes. On the other hand, it is possible to diminuish the mUlti-phonon relaxation (competing with sharp line luminescence) by selecting v
出版日期Book 1977
关键词Laser; Lasers; Seltene Erden; Spektroskopie; electrons; optics
版次1
doihttps://doi.org/10.1007/978-3-642-66696-4
isbn_softcover978-3-642-66698-8
isbn_ebook978-3-642-66696-4Series ISSN 0172-7966
issn_series 0172-7966
copyrightSpringer-Verlag Berlin Heidelberg 1977
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发表于 2025-3-21 23:51:00 | 显示全部楼层
Rare-Earth Lasers,tion of laser action was achieved in ruby by Maiman [2]. In the last 15 years a systematic search was conducted for new laser systems using trivalent and divalent rare earths in a great variety of crystals [3–5], glasses [6–20] and liquids [21–23].
发表于 2025-3-22 01:56:09 | 显示全部楼层
Book 1977 of many-electron systems. Though it is imperative to use samples having optical properties greatly different from the stan­ dard continuous spectrum of opaque objects ("black body" radia­ tion) it is not always necessary to restrict the study to monatomic entities. Thus, spectral lines can be obtai
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0172-7966 ranyl ion or other complexes. On the other hand, it is possible to diminuish the mUlti-phonon relaxation (competing with sharp line luminescence) by selecting v978-3-642-66698-8978-3-642-66696-4Series ISSN 0172-7966
发表于 2025-3-22 15:39:50 | 显示全部楼层
Analogies and Differences Between Monatomic Entities and Condensed Matter,xtent replaced the continuous spectra emitted by incandescent solids in oil lamps and candles, and the electric carbon or tungsten filaments. Whereas Newton did not use sufficiently collimated light and a very narrow slit, Wollaston detected 1802 narrow, dark absorption lines in the Solar spectrum (
发表于 2025-3-22 20:27:44 | 显示全部楼层
Chemical Bonding and Lanthanide Spectra,are not incompatible, as we shall see below, but they contribute to a certain atmosphere of “double truth” permeating much theoretical discussion of rare earths. Furthermore, there is a major difference between the 3d, 4d and 5d groups on the one hand, and the 4f group on the other, so that the exte
发表于 2025-3-22 23:25:51 | 显示全部楼层
Energy Transfer,ed states, they may work also. Energy transfer may increase the population of excited levels of lanthanides by one or two orders of magnitude compared with direct absorption of light into the rare earth ions. The interpretation of energy transfer in glasses may be complicated by inhomogeneous broade
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Renata Reisfeld,Christian Klixbüll Jørgensenfidence on its conclusions on the impact of education on growth. This research is sketched. Another approach makes use of observations at the level of individual industries to measure the association between the educational attainments of workers and productivity growth. This research confirms the n
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