NSR Query Results
Output year order : Descending NSR database version of May 6, 2024. Search: Author = U.Nielsen Found 5 matches. 1988CH02 Phys.Rev. A37, 6 (1988) Hyperfine Structure of the (5d+6s)3 Configuration of 139La I: New measurements and ab initio multiconfigurational Dirac-Fock calculations NUCLEAR MOMENTS 139La; measured hfs; deduced hyperfine constants. Atomic beam laser-rf double-resonance method.
doi: 10.1103/PhysRevA.37.6
1987NI03 J.Phys.(London) B20, 1697 (1987) U.Nielsen, L.-U.Aaen Andersen, O.Poulsen, E.Riis Hyperfine Structure in 167Er I+II+III: Multiconfiguration Dirac-Fock interpretation of measurements NUCLEAR MOMENTS 167Er; measured hfs. Fast-beam laser spectroscopy. Multi-configuration Dirac-Fock calculations. High resolution.
doi: 10.1088/0022-3700/20/8/008
1986NI08 J.Phys.(London) B19, L645 (1986) Ab Initio State-Dependent Multiconfiguration Dirac-Fock Calculations of the Electron Density at the Nucleus for Low-Lying States in the 4f115d6s2 Er I Configuration NUCLEAR MOMENTS 166,170Er; analyzed optical isotope shifts data; calculated electron densities; deduced model validity. Multi-configuration Dirac-Fock approach.
doi: 10.1088/0022-3700/19/19/002
1986NI10 Phys.Scr. 34, 776 (1986) U.Nielsen, K.T.Cheng, H.Ludvigsen, J.N.Xiao Hyperfine Structure of 4f126s and 4f125d Configurations in 167Er II Measured by Collinear Fast-Beam Laser and Radio-Frequency Laser Double-Resonance Spectroscopy NUCLEAR MOMENTS 167Er; measured hfs; deduced magnetic dipole, electric quadrupole hyperfine constants. R.f. laser double resonance spectroscopy.
doi: 10.1088/0031-8949/34/6B/011
1983NI08 Phys.Rev.Lett. 51, 1749 (1983) U.Nielsen, O.Poulsen, P.Thorsen, H.Crosswhite Collinear Laser-rf Double-Resonance Spectroscopy: 235U II hyperfine structure NUCLEAR MOMENTS 235U; measured hfs; deduced 7s electron spin density parameter. 235U level deduced μ. Combined laser-rf double resonance, fast beam collinear laser spectroscopy techniques.
doi: 10.1103/PhysRevLett.51.1749
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