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  • 35.10.F  (2)
  • 07.65  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Ground-state properties of neutron-deficient platinum isotopes (1992)
    Springer
    The European physical journal 342 (1992), S. 1-15 
    Details
    ISSN: 1434-601X
    Keywords: 21.10 ; 21.60 ; 27.70 ; 27.80 ; 35.10.F
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The hyperfine structure splitting and the isotope shift in the λ=266 nm transition of Pt isotopes within the mass range 183 ≦A≦ 198 have been determined by Resonance Ionization Mass Spectroscopy (RIMS) in combination with Pulsed-Laser Induced Desorption (PLID). The Pt isotopes were obtained at the on-line isotope separator ISOLDE-3/CERN as daugthers of the primarily produced Hg isotopes. Magnetic moments, quadrupole moments, and changes in the mean-square charge radii are deduced and compared with results of a particle-triaxial rotor model and mean field calculations. Good agreement with experimental data (including nuclear level schemes and transition probabilities) can only be obtained if triaxial shape is admitted. The calculations yield a smooth transition in the shape of odd-A Pt nuclei from a slightly deformed, nearly oblate195Pt via triaxial197-187Pt to a strongly deformed nearly prolate177Pt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294481
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  • 2
    Electronic Resource
    Electronic Resource
    Trace detection of plutonium by three-step photoionization with a laser system pumped by a copper vapor laser (1985)
    Springer
    Applied physics 38 (1985), S. 249-253 
    Details
    ISSN: 1432-0649
    Keywords: 32 ; 42.60 ; 07.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Laser photoionization has been used to detect trace amounts of plutonium. A high sensitivity and selectivity has been achieved by applying three-step excitation and ionization of the plutonium atoms with high pulse-repetition rates and additional mass determination by time-of-flight measurements. A laser system was developed which consists of a copper vapor laser pumping three dye lasers simultaneously. Samples containing between 1010 and 1012 atoms of239Pu on Re filaments were measured yielding strong resonance signals with maximum ion count rates of several kHz at a vanishingly low background. A detection efficiency of 10−7 was determined allowing the detection of about 108 plutonium atoms in a sample.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00818051
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Quadrupole moments of radium isotopes from the 7p 2 P 3/2 hyperfine structure in Ra II (1988)
    Springer
    The European physical journal 11 (1988), S. 105-111 
    Details
    ISSN: 1434-6079
    Keywords: 31.30.G ; 31.30.J ; 35.10.F ; 42.65.C
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The hyperfine structure and isotope shift of221–226Ra and212,214Ra have been measured in the ionic (Ra II) transition 7s 2 S 1/2–7p 2 P 3/2 (λ=381.4 nm). The method of on-line collinear fast-beam laser spectroscopy has been applied using frequency-doubling of cw dye laser radiation in an external ring cavity. The magnetic hyperfine fields are compared with semi-empirical and ab initio calculations. The analysis of the quadrupole splitting by the same method yields the following, improved values of spectroscopic quadrupole moments:Q s (221Ra)=1.978(7)b,Q s (223Ra)=1.254(3)b and the reanalyzed valuesQ s (209Ra)=0.40(2)b,Q s (211Ra)=0.48(2)b,Q s (227Ra)=1.58(3)b,Q s (229Ra)=3.09(4)b with an additional scaling uncertainty of ±5%. Furthermore, theJ-dependence of the isotope shift is analyzed in both Ra II transitions connecting the 7s 2 S 1/2 ground state with the first excited doublet 7p 2 P 1/2 and 7p 2 P 3/2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01444425
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    Paper (German National Licenses)
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