Isotope Shifts and Hyperfine Structure in the[Xe]4f(7)5d 6s(2) D-2(J)->[Xe]4f(7)5d 6s 6p F-9(J+1) Transitions of Gadolinium

Journal Article · Wed Dec 01 04:00:00 EST 1999 · European Physical Journal. D, Atomic, molecular and optical physics

OSTI ID:15001364

Blaum, K ^[1]; Bushaw, Bruce A ^[2]; Diel, S ^[3]; Geppert, Ch ^[4]; Kuschnick, A ^[3]; Muller, P ^[1]; Nortershauser, W ^[5]; Schmitt, A ^[3]; Wendt, K ^[1]

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1. Johannes Gutenberg-Universitat
2. BATTELLE (PACIFIC NW LAB)
3. Johannes Gutenberg-Universitat Mainz
4. Johnnes Gutengerg-Universitat Mainz
5. AWU

High-resolution resonance ionization mass spectrometry has been used to measure isotope shifts and hyperfine structure in all[Xe] 4f 7 5d 6s2 9DJ ---[Xe] 4f 7 5d 6s 6p 9FJ+1 (J= 2-6) and the[Xe] 4f 7 5d 6s2 9D6---[Xe] 4f 7 5d 6s 6p 9D5 transitions of gadolinium (Gd I). Gadolinium atoms in an atomic beam were excited with a tunable single-frequency laser in the wavelength range of 422 - 429 nm. Resonant excitation was followed by photoionization with the 363.8 nm line of an argon ion laser and resulting ions were mass separated and detected with a quadrupole mass spectrometer. Isotope shifts for all stable gadolinium isotopes in these transitions have been measured for the first time. Additionally, the hyperfine structure constants of the upper states have been derived for the isotopes 155, 157Gd and are compared with previous work. Using prior experimental values for the mean nuclear charge radii, derived from the combination of muonic atoms and electron scattering data, field shift a nd specific mass shift coefficients for the investigated transitions have been determined and nuclear charge parameters l for the minor isotopes 152, 154Gd have been calculated.

• Research Organization: Pacific Northwest National Lab., Richland, WA (US)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 15001364
• Report Number(s): PNNL-SA-32860; KC0302020
• Journal Information: European Physical Journal. D, Atomic, molecular and optical physics, Journal Name: European Physical Journal. D, Atomic, molecular and optical physics Journal Issue: 1 Vol. 11
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ARGON IONS
ATOMIC BEAMS
ATOMIC NUMBER
GADOLINIUM
GADOLINIUM ISOTOPES
HYPERFINE STRUCTURE
IONIZATION
MASS SPECTROMETERS
MASS SPECTROSCOPY
MUONIC ATOMS
SPECTRAL SHIFT