THE Rb$sup 85$-Rb$sup 86$ HYPERFINE-STRUCTURE ANAOMALY

Technical Report · Mon Aug 01 04:00:00 EDT 1960

OSTI ID:4050079

Braslau, N; Brink, G O; Khan, J M

The atomic beam magnetic-resonance method with separated oscillatory fields was used to measure the hyperfine structure separation and magnetic dipole moment of the isotopes Rb/sup 85/ and 18.6d Rb/sup 86/ in the /sup 2/S/sub 1/2/ electr onic ground state. Observation of the separation of a DELTA F = plus or minus 1 doublet in the intermediate field region gave the value of the moment; the minimum value of the mean doublet frequency gave the value of DELTA nu . Obserwation of another DELTA F = plus or minus 1 doublet in low field also yielded a value for plus or minus nu . Results obtained for Rb/sup 85/ are in good agreement with previously published values and indicate that transition frequencies calculated from the Briet-Rabi equation agree with experiment to at least one part per million. For Rb/sup 86/ the following values were obtained for the /sup 2/S/sup 1/4/, ground state: DELTA nu = 3946.883(2) Mc, g/sub I/ = -4.590(4) x 10/sup -4/, and mu /sub I/ = hyperfine-structure anomaly arose in part from the difference of the volume distribution of nuclear magnetism in the two nuclei and is defined as the deviation from equality of the ratio of the hyperfine-splitting factors of two isotopes to the ratio of their nuclear g factors. For these two isotopes its value was found to be /sup 85/ DELTA /sup 86/ = 0.17(9)%. The Bohr-Weisskopf theory of the hfs anomaly was applied to these isotopes with calculations based on a single particle model with varying distributions of spin and orbital contributions to the magnetic moment. (auth)

• Research Organization: California. Univ., Berkeley. Lawrence Radiation Lab.
• DOE Contract Number: W-7405-ENG-48
• NSA Number: NSA-15-016412
• OSTI ID: 4050079
• Report Number(s): UCRL-9130(Rev.)
• Country of Publication: United States
• Language: English

Related Subjects

ATOMIC MODELS
ATOMS
BEAMS
BREIT-RABI FORMULA
CONFIGURATION
CYCLOTRONS
DIPOLES
ELECTRONS
ELEMENTARY PARTICLES
ENERGY LEVELS
FREQUENCY
GYROMAGNETIC RATIO
HYPERFINE STRUCTURE
HYPERONS
INDEPENDENT PARTICLE MODEL
INTERACTIONS
MAGNETIC FIELDS
MAGNETIC MOMENTS
MAGNETIC RESONANCE
MATHEMATICS
MEASURED VALUES
MESONS
MODULATION
NUCLEAR MODELS
NUCLEAR THEORY
NUCLEI
NUCLEONS
ORBITS
PHOTOPRODUCTION
PHYSICS
PIONS
PRODUCTION
RUBIDIUM 85
RUBIDIUM 86
SPIN
SYNCHROCYCLOTRONS
SYNCHROTRONS
VOLUME