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  • 1985-1989  (7)
  • 1
    Electronic Resource
    Electronic Resource
    Determination of the242m Am nuclear moments (1988)
    Springer
    The European physical journal 330 (1988), S. 235-239 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.Ky ; 27.90.+b ; 35.10.Fk ; 35.80.+s ; 31.30.Gs ; 29.90.+r
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The hyperfine structure of Am atoms was investigated in an atomic beam by laser spectroscopy. The observed splittings were evaluated with respect to the magnetic dipole and electric quadrupole moments of242m Am. The results are: μ I (242m Am)=+0.97(5)nm,Q(242m Am)=+6.5(2.0)b.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294866
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Nuclear radii of thorium isotopes from laser spectroscopy of stored ions (1989)
    Springer
    The European physical journal 334 (1989), S. 103-108 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.F ; 21.60 ; 27.90 ; 29.90 ; 31.30.G ; 32.50.F ; 32.80.K ; 35.10.F ; 35.80 ; 42.60.K
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Isotope shifts and hyperfine splittings in optical transitions for atomic ions of the thorium isotopes227Th to230Th and232Th have been measured by laser spectroscopy on stored ions. From the isotope shift data, changes of the mean square charge radii are determined. A continuous increase of the charge radius with mass numberA is observed, in agreement with droplet model calculations. The results indicate that the odd-even staggering for Th is different from that one of the neighbouring isotones of Fr and Ra. There is some empirical evidence from systematics for an inversion of the staggering and the appearance of an octupole deformation atN ≦137. The hyperfine splitting for229Th for 3 electronic levels is given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294392
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Charge radii and moments of strontium nuclei by laser spectroscopy (1987)
    Springer
    The European physical journal 326 (1987), S. 493-500 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.Ft ; 21.10.Ky ; 27.50. +e ; 27.60.+j ; 35.10.Fk ; 35.80. +s ; 25.55.−e
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The isotope shifts and hyperfine splittings for 11 strontium isotopes (A=80–90) and two isomers for the optical transition λ=293.2 nm were measured. The magnetic dipole and electric quadrupole moments and the changes of the mean square charge radii are derived. The results are discussed with respect to the increasing nuclear deformation and the anomalous coupling scheme of light Sr nuclei.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01289554
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  • 4
    Electronic Resource
    Electronic Resource
    Atomic beam, optogalvanic and stored ion spectroscopy for radioactive isotopes (1987)
    Springer
    Hyperfine interactions 38 (1987), S. 723-740 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Systematic studies of the optical isotope shift and the hyperfine splitting of long chains of stable and radioactive isotopes were performed. The method applied was laser induced resonance absorption; the experimental techniques were the atomic beam method with fluorescence detection and the optogalvanic method. The theory of hyperfine splitting and isotope shift of atoms is reviewed in short with emphasis on the aspects interesting for nuclear physics and on the evaluation problem. The experimental methods are described and their key parameters sensitivity and resolution are discussed. Preliminary results on stored thorium ions are given. Sample results for the nuclear quantity δ〈r 2〉 derived from atomic beam experiments with tin and strontium are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02394871
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  • 5
    Electronic Resource
    Electronic Resource
    The 3d states of23Na and7Li: determination of unresolved hyperfine splittings and radiative lifetimes (1988)
    Springer
    The European physical journal 8 (1988), S. 109-118 
    Details
    ISSN: 1434-6079
    Keywords: 07.65.Eh ; 31.30.Gs ; 31.50.+w ; 32.70.Cs ; 32.70.Fw ; 32.70.Jz ; 32.30.Jc ; 35.10.Fk ; 42.65.Ft
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The electronic transitions from the ground state to the 3d states have been studied for23Na and7Li atoms by two-photon Doppler-free laser spectroscopy. The positions of the resonances are used to determine the unresolved hyperfine structure of the 3d states from which the magnetic-dipole hyperfine interaction constantsA are derived. The results for theA factors are:A(3d 2 D 3/2;23Na)=+527(25) kHz;A(3d 2 D 5/2;23Na)=+108.5(2.4) kHz;A(3d 2 D 3/2;7Li)=+843(41) kHz;A(3d 2 D 5/2;7Li)=+343.6(1.0) kHz. For the fine structure intervals fs of the 3d doublets we obtain: fs(3d Na)=-1 494 444(44) kHz and fs(3d Li)=+1 083 936(60) kHz. The linewidths of the resonances are evaluated with respect to the natural lifetimes of the 3d states. For Na the result is τ(3d Na)=19.27(23) ns.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01384502
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  • 6
    Electronic Resource
    Electronic Resource
    A test of the accuracy of atomic-beam laser spectroscopy (1987)
    Springer
    The European physical journal 7 (1987), S. 113-118 
    Details
    ISSN: 1434-6079
    Keywords: 07.65.Eh ; 35.80. +s ; 35.10.Fk
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract To determine the accuracy to which hyperfine splittings can be measured using a cw dye laser with rf sideband tuning, a series of atomic beam experiments with59Co was performed. One hyperfine splitting of the first excited metastable atomic state was measured and compared with the results for the same splitting from magnetic rf resonance experiments. The uncertainty with the methods applied was found to be about 0.05 to 1% of the experimental linewidth in general; it is ±20 kHz or ±0.05% of the linewidth in the present Co experiment. The hyperfine splitting constants of the 3d 8 4p 2 F 7/2 state were found to beA=419.3(9) MHz,B=−77(17) MHz.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01384574
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  • 7
    Electronic Resource
    Electronic Resource
    Isotope shift of a series of Sr isotopes (1986)
    Springer
    The European physical journal 3 (1986), S. 421-422 
    Details
    ISSN: 1434-6079
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We give data of the isotope shift for the strontium isotopes from A=80 to A=90. They are found to be inconsistent with data from another optical transition. Possible reasons for the discrepancy are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01437201
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