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  • 1
    Electronic Resource
    Electronic Resource
    Analyse eines Dubletts mit Hilfe der Fourier-Integraltransformation (1988)
    Springer
    Electrical engineering 71 (1988), S. 121-124 
    Details
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Contents The determination of the fundamental parameters of a doublet-structure is achieved by a new numerical method based on a coupling between a Fourier-integral-representation of the structure with a linearized least squares procedure. There are only two a priori assumptions concerning the profile function of the doublet-components: axial symmetry in respect to the line centers and equality of the profiles except of an affine transformation of the ordinate values (K≠1). The results of the doublet analyzing technique are presented.
    Notes: Übersicht Zur Bestimmung der Kenngrößen einer Dublettstruktur wurde ein neues numerisches Verfahren entwickelt, das auf einer Kopplung einer Fourier-Integraldarstellung der Struktur mit einem Variationsverfahren nach der Methode der kleinsten Quadrate basiert. Über die Profilfunktion der Konstituenten des Dubletts werden dabei nur zwei a priori Annahmen gemacht: Achsensymmetrie und Gleichheit der Profile bis auf eine affine Transformation der Ordinaten (K≠1). Die Ergebnisse der Dublettanalyse werden vorgestellt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01574047
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  • 2
    Electronic Resource
    Electronic Resource
    A single ion as a nanoscopic probe of an optical field (2001)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 414 (2001), S. 49-51 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In near-field imaging, resolution beyond the diffraction limit of optical microscopy is obtained by scanning the sampling region with a probe of subwavelength size. In recent experiments, single molecules were used as nanoscopic probes to attain a resolution of a few tens of nanometres. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/35102129
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  • 3
    Electronic Resource
    Electronic Resource
    Bestimmung der Kernquadrupolmomente der beiden stabilen Europiumisotope aus dem Eu II-Spektrum (1968)
    Springer
    The European physical journal 214 (1968), S. 332-356 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The hyperfine structure of the transitions 4f 7 6p 9 P 3,4,5−4f 7 6s 9 S 4,7 S 3 in the spark spectrum of europium was investigated by a digital recording double-Fabry-Perot-spectrometer. Enriched samples of151Eu and153Eu were used in hollow cathode light sources cooled in liquid air. As the hyperfine splitting of the9 P levels was not completely resolved the patterns were analysed by a computer. TheA- andB-values of the9 P levels were determined for both isotopes. Together with the experimentalA-values of the7 P levels theseA-values were used to check the eigenfunctions ofBordarier, Judd, andKlapisch, which have been calculated for intermediate coupling. Good agreement between observed and calculatedA-values was reached only if the spherical-symmetric part of the magnetic hyperfine interaction operator of the 6p-electron was used as a free parameter. In this way the configuration interaction between 4f 7 6p and 4f 6 6s 6d can be taken into account. Fortunately this mixing does not affect the quadrupole interaction. Therefore the quadrupole moments were derived from the measuredB-values using the unperturbed eigenfunctions. The resultsQ(151Eu)=(1.12 ±0.07) · 10−24 cm2 andQ(153Eu)=(2.85 ± 0.18) · 10−24cm2 are in complete agreement with the values obtained byMüller, Steudel, andWalther in the 4f7 6s 6p levels of the arc spectrum of europium. The values found for the hyperfine anomaly agree very well with the values derived from levels in Eu I and Eu III.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01379977
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  • 4
    Electronic Resource
    Electronic Resource
    Die Kernmomente und die relative Isotopenlage des Os187 (1961)
    Springer
    The European physical journal 165 (1961), S. 356-368 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Using 4 mg of radiogenic Os187 the hyperfine structure of this isotope has been investigated with a recording Fabry-Perot interferometer. From the measurement of intensities and distances of the hyperfine-structure components in three fine-structure lines the spin and the magnetic moment of the Os187 nucleus have been determined to beI=1/2 andμ I =+(0,0652±0,0011) n.m. In three fine-structure lines the isotopic shift has been measured and the relative isotopic shift of Os187 has been found to be $$\frac{{\Delta v(Os^{192} - Os^{187} )}}{{\Delta v(Os^{192} - Os^{190} )}} = 3,09 \pm 0,03$$ . The two classifications of the fine-structure line λ 4261 Å have been verified by observing both transitions in Os187.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01381754
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  • 5
    Electronic Resource
    Electronic Resource
    Laser-induced fluorescence line narrowing in cobalt I (1994)
    Springer
    Applied physics 59 (1994), S. 299-306 
    Details
    ISSN: 1432-0649
    Keywords: 32.30.Jc ; 32.50. + d ; 35.10.Fk
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Laser-Induced Fluorescence Line Narrowing (LIFLN) measurements of hyperfine structure splittings performed on the cobalt I transition sequence3d 84s a 2 P 1/2→3d 74s4p z 24D 3/2 0 →3d 84s b 4 F 3/2are presented. The hyperfine coupling constants of theb 4 F 3/2 level were determined to beA = 302.8(1.9) MHz andB = − 81.6(18.2) MHz and are compared with results of both experimental and theoretical studies reported by other authors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01081397
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  • 6
    Electronic Resource
    Electronic Resource
    Hyperfine structure in the atomic spectrum of niobium (2003)
    Springer
    The European physical journal 23 (2003), S. 57-62 
    Details
    ISSN: 1434-6079
    Keywords: PACS. 32.30.Jc Visible and ultraviolet spectra – 31.30.Gs Hyperfine interactions and isotope effects, Jahn-Teller effect
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: We report on hyperfine structure measurements in 21 lines of atomic niobium in the spectral region from 640 nm to 870 nm by means of optogalvanic laser spectroscopy and laser induced fluorescence spectroscopy using a hollow cathode discharge and a tunable single-mode cw ring laser. Hyperfine structure constants A and B of altogether 29 excited energy levels were determined, 18 of them for the first time.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjd/e2003-00026-8
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  • 7
    Electronic Resource
    Electronic Resource
    Investigation of the hyperfine structure of TaI-lines (1993)
    Springer
    The European physical journal 27 (1993), S. 343-347 
    Details
    ISSN: 1434-6079
    Keywords: 35.10.B ; 32.50 ; 32.20.J
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The hyperfine structure of several spectral lines of the neutral tantalum atom was investigated by means of saturated optogalvanic laser spectroscopy. From the spectra, we have determined the magnetic hyperfine interaction constants A and the electric quadrupole interaction constants B of 14 levels with even parity and 23 levels of odd parity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01437467
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  • 8
    Electronic Resource
    Electronic Resource
    Doppler-free laserspectroscopic investigations of hyperfine structure in the atomic cobalt spectrum (1990)
    Springer
    The European physical journal 17 (1990), S. 181-193 
    Details
    ISSN: 1434-6079
    Keywords: 35.10.Fk ; 32.20.Jc ; 31.30.Gs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Performing Doppler-free laserspectroscopic investigations in the red wavelength region (640–670 nm) we were able to determine 10A-factors and 9B-factors of atomic cobalt levels. Now precise values of 18A-factors and 16B-factors of levels belonging to the configurations (3d+4s)9 are known. Fitting of the one-electron radial parameters to introduce agreement between experimental and theoretical hfs constants allows the prediction of hfs constants of not yet investigated fine structure levels. Values of the electric quadrupole moment of the Co59 nucleus are determined in two electron configurations. The resulting mean value of the spectroscopic quadrupole moment isQ=0.35(3) barn.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01437898
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  • 9
    Electronic Resource
    Electronic Resource
    Hyperfinestructure constants of the Eu-I level 4f 7 6s 6p z 6 P 7/2 (1991)
    Springer
    The European physical journal 21 (1991), S. 189-190 
    Details
    ISSN: 1434-6079
    Keywords: 35.10.F ; 32.50.F ; 32.20.J
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The hyperfinestructure constantsA andB of the levelz 6 P 7/2 of the Eu I configuration 4f 7 6s6p and the IS (isotopic shift) of the line combining this level with the ground state were determined to be:151Eu:A=−6.109(30) MHzB=134.05(66) MHz153Eu:A=−2.993(18) MHzB=321.04(46) MHz IS (151Eu−153Eu)=−3616(1) MHz (λ=5765.20 Å) These values agree very well with those of other authors [1–6].
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01426370
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  • 10
    Electronic Resource
    Electronic Resource
    Hyperfine structure investigations of the tantalumI blend λ=6356.14 Å (1992)
    Springer
    The European physical journal 23 (1992), S. 151-153 
    Details
    ISSN: 1434-6079
    Keywords: 35.10.F ; 32.50 ; 32.20.J
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The TaI line 6356.14 Å, up to now classified as the transition 5d 36s 2 a 4 P 5/2−5d 36s(a 5 F)6p z 4 F 7 2/0 , is a blend with a second transition, which is related to the additional levels 5d 4(b 3 G)6s a 4 G 9/2−39641.24 cm−1 J=7/2°. Using laser excitation with optogalvanic and laser-induced fluorescence detection, the hyperfine constants of the four levels involved and the distance of the center wavelengths of the two fine structure transitions could be determined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01436737
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