Hyperfine Structure in the Ground State of the Stable Isotopes of Europium

Journal Article · Tue Sep 06 04:00:00 EDT 1960 · Proceedings of the Royal Society. A. Mathematical, Physical and Engineering Sciences

DOI:https://doi.org/10.1098/rspa.1960.0149· OSTI ID:4150471

Sandars, P. G. H.; Woodgate, G. K.

The hyperfine structure of the ground states 4f⁷6s²⁸S₇2, of Eu¹⁵¹ and Eu¹⁵³ were measured by the method of magnetic resonance in an atomic beam. The sign of the hyperfine structure and the value of g_j were measured. The results are g_j = 1.9935 plus or minus 0.0003; A(151) = --20.0523 plus or minus 0.0002 Mc/s, A(153) = --8.8532 plus or minus 0.0002 Mc/s; and B(151) = --0.7012 plus or minus 0.0035 Mc/s, B(153) = --1.7852 plus or minus 0.0035 Mc/s. These results disagree with the values expected for the pure ⁸S₇2 state formed from a half-filled shell of f-electrons. Calculations on the basis of admixture of higher states of the configuration by spin-orbit coupling account for the discrepancy in g/sub j/ but do not explain the values of the hyperfine stracture constants A and B. Further theoretical work is in progress.

• Research Organization: Univ. of Oxford
• Sponsoring Organization: USDOE
• NSA Number: NSA-14-024905
• OSTI ID: 4150471
• Journal Information: Proceedings of the Royal Society. A. Mathematical, Physical and Engineering Sciences, Journal Name: Proceedings of the Royal Society. A. Mathematical, Physical and Engineering Sciences Journal Issue: 1289 Vol. 257; ISSN 1364-5021
• Publisher: The Royal Society Publishing
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
BEAMS
CONFIGURATION
ELECTRONS
ENERGY LEVELS
EUROPIUM 151
EUROPIUM 153
GYROMAGNETIC RATIO
HYPERFINE STRUCTURE
MAGNETIC MOMENTS
MAGNETIC RESONANCE
MEASURED VALUES
NUMERICALS
SPIN