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  • 1
    Electronic Resource
    Electronic Resource
    Splitting of the luminescent excited state of the uranyl ion (1982)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 86 (1982), S. 1921-1922 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100207a038
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  • 2
    Electronic Resource
    Electronic Resource
    Assignment of the 5I5 crystal-field levels of hexachloroholmate(3-) (1986)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 90 (1986), S. 5605-5608 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100280a025
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  • 3
    Electronic Resource
    Electronic Resource
    Luminescence and vibrational spectra of the UO2Br42- ion (1981)
    s.l. : American Chemical Society
    Inorganic chemistry 20 (1981), S. 4405-4407 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic50226a073
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  • 4
    Electronic Resource
    Electronic Resource
    Configuration interaction of Pr3+ in PrCl63− (2001)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 114 (2001), S. 10860-10871 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The low-temperature electronic spectra of Pr3+ at an octahedral site of symmetry in the PrCl63− moiety, in crystals of Cs2NaPrCl6, Cs2LiPrCl6, and Cs2NaMCl6:Pr(M=Gd, Y) have been measured and interpreted. Together with the results from d–f emission spectra and resonance electronic Raman spectra, these new data permitted the assignment of symmetry representations of up to 39 out the possible 40 crystal field levels of the 4f2 configuration. The inclusion of configuration interaction with the next highest even parity configuration, 4f6p, into the energy level parametrization reduced the mean deviation of the energy level fit using the single 4f2 configuration model alone, by a factor of 2.9 (i.e., from 32.7 to 11.6 cm−1). In particular, the interaction mechanism for the "anomalous" multiplets 1D2 and 1G4 was shown to arise from crystal field mixing with 4f6p states. This leads to the inclusion of up to about 0.5% of fp-orbital character for these 4f2 eigenvectors. In the 4f2 single-configuration fits to triplet levels alone, the fourth-degree crystal field parameter turned out to be larger than in the fits to singlet terms, which is the reverse of the expected order if correlation crystal field effects are important. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1373645
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  • 5
    Electronic Resource
    Electronic Resource
    Comment on "Energy levels of Tm3+ in cubic symmetry'' (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 85 (1986), S. 2344-2345 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.451087
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  • 6
    Electronic Resource
    Electronic Resource
    Synthesis, crystal structure and vibrational spectra of uranium(IV) hypophosphite (1992)
    Springer
    Journal of chemical crystallography 22 (1992), S. 25-30 
    Details
    ISSN: 1572-8854
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The preparation, crystal structure, and infrared spectrum are reported for the new compound U(H2PO2)4. The coordination geometry of uranium is approximately described as a square antiprism. The four independent hypophosphite groups which are bonded to each uranium atom also serve as bridging groups in linking the uranium centers into a three-dimensional network. The internal H2PO 2 − vibrational modes in the infrared spectrum of U(H2PO2)4 show unit-cell group couplings, particularly for the P-H stretching vibrations, making the spectrum distinctly different from that of the simple bidentate non-bridging H2PO 2 − ion in KH2PO2 and VO(H2PO2)·H2O.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01161359
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  • 7
    Electronic Resource
    Electronic Resource
    Acid Rain and Below-Cloud Scavenging in South-Western China (1997)
    Springer
    Journal of atmospheric chemistry 27 (1997), S. 71-78 
    Details
    ISSN: 1573-0662
    Keywords: washout ; scavenging ; Southern China ; sulphur dioxide ; acid rain ; simulation ; aerosol ; cloudwater
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences
    Notes: Abstract Major urban areas in south-western China exhibit unique air pollutionproblems due to increasing use of high sulphur-content fuels in an environmentof unfavourable topography and climate. Ambient levels of sulphur dioxideexceed the air quality objectives, and this gas is the major precursor of acidrain. Cloudwater chemistry studies are reported for urban, suburban andcountryside locations, during the period 1985–1989. Although cloudwateracidity was found to increase towards the cloud base, the acidity was muchgreater for rainwater samples collected simultaneously, and was morepronounced in urban rather than neighbouring suburban or countryside regions.The main contribution to the acidity arises from below-cloud scavenging of gasand aerosol and model calculations are able to simulate this behaviour.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005852700933
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  • 8
    Electronic Resource
    Electronic Resource
    Relationships Between Rainwater Composition and Synoptic Weather Systems Deduced from Measurement and Analysis of Hong Kong Daily Rainwater Data (1999)
    Springer
    Journal of atmospheric chemistry 33 (1999), S. 219-240 
    Details
    ISSN: 1573-0662
    Keywords: acid rain ; Hong Kong ; windspeed ; synoptic weather system ; bulk and wet deposition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences
    Notes: Abstract The composition of Hong Kong rainwater has been studied in the context of seven types of prevailing synoptic weather system. These represent different precipitating airmass origins in terms of continental, maritime, local or mixed sources. Replicate sampling was performed on a daily basis from 1994–1995 for both bulk deposition (n = 60) and simultaneous wet deposition (n = 27) collectors. Reliable analytical data were obtained for the concentrations of the soluble components H+, Na+, Ca2+, K+, Mg2+, Cl-, NO3- and SO42-. The acidity of rainwater was found to be greater when Hong Kong was under the influence of an approaching cyclone (type AC), northeasterly monsoon (type NE) or cold front (type CF) than for prevailing easterly anticyclones (type E), southerly/southwesterly monsoon systems (type S), or cyclonic flows (type C). A common characteristic of occasions of acid rain in Hong Kong was the build-up of local pollutants under conditions of low windspeed, as shown by the significant correlation between rainwater pH and lognormal surface windspeed, but not windvector. The acidity of Hong Kong rainwater was thus largely determined by local sources, although the participation of a continental airmass was evident for some systems. The daily bulk deposition flux of H+ on rainy days varied by more than an order of magnitude from type C (0.2 meq m-2 d-1) to types AC, trough (T) and NE (〉2 meq m-2 d-1).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006174502144
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  • 9
    Electronic Resource
    Electronic Resource
    Small-Scale Horizontal Variations in Ionic Concentrations of Bulk Deposition from Hong Kong (2000)
    Springer
    Water, air & soil pollution 122 (2000), S. 433-448 
    Details
    ISSN: 1573-2932
    Keywords: bulk deposition ; chloride loss ; factor and cluster analyses ; non-seasalt sulphate ; spatial variation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The concentrations of major anions andcations in bulk deposition were found to varyspatially by factors of up to 65, for two samplings at17 sampling sites separated by 45 km or less in theTerritory of Hong Kong. Under predominantly maritimeairstreams, these variations resulted from localemissions, as well as from lower seasaltconcentrations at the more northerly sites. The weakacidity of the bulk deposition resulted fromneutralization of hydrometeors by basic particulatematter, leading to an unusual anticorrelation of theconcentrations of non-seasalt sulphate and hydrogenions. Greater anthropogenic activity at inland andindustrial sites was generally marked by highernitrate concentrations, with the ratio of nitrate ionconcentrations from the two samplings being stronglycorrelated with that of calcium ion. Chloride lossincreased with increasing concentrations ofnon-seasalt nitrate and sulphate. Most of the variancein the bulk deposition data for 8 major anions andcations could be explained by 2 factors: seasalt andanthropogenic, in common with the 1997 EnvironmentalProtection Department data for these species in totalsuspended particulate matter. Results for 14 solubletrace metal species in the bulk deposition at thesites are also reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005245222016
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  • 10
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    Glass composition and excitation wavelength dependence of the luminescence of Eu3+ doped lead borate glass (2011)
    American Institute of Physics
    Details
    Publication Date: 2011-08-01
    Print ISSN: 0021-8979
    Electronic ISSN: 1089-7550
    Topics: Physics
    Published by American Institute of Physics
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