Download or read book Exchange Interaction Between Chromium Ions in Ruby Crystals written by F. J. MILFORD and published by . This book was released on 1962 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: ESCRIPTORS: *Metabolic products, *O OR tor ge, Urine, Control, Materials, Plastics, Disinfecta t, Sa i ry engin ering. Identifiers: Fall-out shelters. Data are pre ented on he storability of human waste in fiber drum containers line ith t ree diff rent plastic films and containing four differe sanitizers, over a period of 14 day . Adequate odor control was achieved with all sanitizers, i.e. soda ash, cresylic aci s, aponified phenols and sodium pentachlorophenate, ALTHOUGH SODA ASH SHOWED NO BAC ERICIDAL ACTION. Cresylic acids appear to be the preferred sani i r. Amo g h liners, vinyl showed poor integrity, polyethylene and polyethylene-cellop a lami a e howed marginal integrity. All plas ics sho ed chemical compatibility it the waste. D- *>+ N5 +++Storage of human wa te in fiber drum lined with polyethylene or vinyl liners. The effects of 4 different disi fec ants on co trol of gas evolution and odor.
Download or read book The Interaction of Chromium Ions in Ruby Crystals written by Richard C. Powell and published by . This book was released on 1966 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: Absorption, excitation, continuous fluorescence, and pulse fluorescence measurements were made on ruby samples with 0.94% and 2.1% Cr+3 in the temperature range from 4.2K up to 700K. The widths, positions, intensities, and lifetimes of the R and N fluorescence lines were determined at numerous temperatures. The results for the temperature dependence of the linewidths are explained in terms of microscopic strains, Raman scattering of phonons by the impurity ions, and direct phonon processes. The results for the lineshifts with temperature are due to the absorption and emission of virtual phonons. The observed lifetimes of the R and N lines coincide in the temperature range where the systems are thermalized and the observed decays are pure exponentials. At temperatures where the systems are decoupled, an initial rise in fluorescence is observed at the N lines. The subsequent decay has the lifetime of the R lines for a 0.94% sample and the lifetime of the N lines for a 2.1% sample. These results are also explained in terms of energy transfer from single ions to pairs. The effects of reabsorption on the fluorescence spectrum are also discussed. (Author).
Download or read book Exchange Interaction Between Pairs of Chromium Ions in Ruby written by P. Kisliuk and published by . This book was released on 1963 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: The temperature dependence of the absorption of the spectral lines due to pairs of chromium ions in concentrated ruby at 7009 and 7041 Angstroms is fitted to theory by assuming isotropic exchange coupling. Other frequencies predicted from the parameters thus determined are identified in the observed spectrum. Higher states are identified by means of the excitation spectrum and the spacings already known from the identification of the lower levels. To a closer approximation, it is found that the ground state splitting can be fitted within the experimental error using isotropic exchange if a biquadratic term is included, in addition to the usual quadratic term. Furthermore, the ratio of the coefficients of these terms is of the same order as that found in other materials and predicted by theory. The excited states, however, do not appear to fit a theory based on isotropic exchange coupling as the sole perturbation. (Author).
Download or read book Microwave optical Investigations of Cr superscript 3 Pairs in Ruby written by Michael John Berggren and published by . This book was released on 1969 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Exchange coupled Chromium Ion Pairs in Ruby written by Linn Frederick Mollenauer and published by . This book was released on 1965 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Interaction of Chromium Ions in Ruby Crystals written by Richard Conger Powell and published by . This book was released on 1966 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Absorption, excitation, continuous fluorescence, and pulse fluorescence measurements were made on ruby samples with 0.94% and 2.1% Cr+3 in the temperature range from 4.2K up to 700K. The widths, positions, intensities, and lifetimes of the R and N fluorescence lines were determined at numerous temperatures. The results for the temperature dependence of the linewidths are explained in terms of microscopic strains, Raman scattering of phonons by the impurity ions, and direct phonon processes. The results for the lineshifts with temperature are due to the absorption and emission of virtual phonons. The observed lifetimes of the R and N lines coincide in the temperature range where the systems are thermalized and the observed decays are pure exponentials. At temperatures where the systems are decoupled, an initial rise in fluorescence is observed at the N lines. The subsequent decay has the lifetime of the R lines for a 0.94% sample and the lifetime of the N lines for a 2.1% sample. These results are also explained in terms of energy transfer from single ions to pairs. The effects of reabsorption on the fluorescence spectrum are also discussed. (Author)
Download or read book U S Government Research Reports written by and published by . This book was released on 1962 with total page 1170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Publications Announcements with Indexes written by United States. National Aeronautics and Space Administration and published by . This book was released on 1962 with total page 1100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Levels of Chromium Ion Pairs in Ruby written by Paul P. Kisliuk and published by . This book was released on 1969 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: The lower energy levels of a number of transitions due to second, third, and fourth nearest neighbor chromium ion pairs in ruby are located by measuring the temperature dependence of optical absorption. Energy level diagrams are constructed, from which many of the observed lines are identified. The measurements are consistent with earlier results for the ground states of first, third, and fourth nearest neighbor pairs. The ground-state levels of the second nearest neighbor pairs are describable by an isotropic exchange interaction. The ground-state coupling parameters for the first four nearest neighbor types are used to estimate the Neel and Curie-Weiss temperatures for Cr2O3. (Author).
Download or read book Proceedings written by and published by . This book was released on 1963 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research Reports written by and published by . This book was released on 1964 with total page 1586 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Keywords Index to U S Government Technical Reports written by United States. Department of Commerce. Office of Technical Services and published by . This book was released on 1962 with total page 990 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Physics of Nonmetallic Crystals written by International conference on chemical physics of nonmentallic crystals and published by . This book was released on 1962 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1978 with total page 762 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Keywords Index to U S Government Technical Reports permuted Title Index written by United States. Department of Commerce. Office of Technical Services and published by . This book was released on 1962 with total page 860 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Foundations Of Modern Epr written by Gareth R Eaton and published by World Scientific. This book was released on 1998-05-08 with total page 833 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since its inception 50 years ago, electron paramagnetic resonance (EPR, also called ESR or EMR) has become a major tool in diverse fields ranging from biology and chemistry to solid state physics and materials science. This important book includes personal descriptions of early experiments by pioneers who laid the foundations for the field, perspectives on the state of the art, and glimpses of future opportunities. It presents a broad view of the foundations of EPR and its applications, and will therefore appeal to scientists in many fields. Even the expert will find here history not previously recorded and provocative views of future directions.
Download or read book Bibliography of Scientific and Industrial Reports written by and published by . This book was released on 1965-07 with total page 1698 pages. Available in PDF, EPUB and Kindle. Book excerpt:
