The rubidium-85-rubidium-86 hyperfine-structure anomaly

Thesis/Dissertation · Mon Mar 21 00:00:00 EST 1960

DOI:https://doi.org/10.2172/4154901· OSTI ID:4154901

Braslau, Norman ^[1]

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1. Univ. of California, Berkeley, CA (United States)

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 Rb⁸⁵ and Rb⁸⁶. Observation of a Δ F = plus or minus 1 doublet in the magnetic field region where its mean value is a minimum gives the values of these observables; the doublet separation is proportional to the nuclear g factor and the mean doublet frequency is proportional to the hyperfine structure separation. Results obtained on Rb⁸⁵ are in excellent agreement with previously published values, and indicate that the transition frequencies calculated from the Breit-Rabi energy-level equation agree with the experiment to better than one pant per million. For the isotope Rb⁸⁶ the following values were obtained for the ²S_1/2 electronic ground state: Δ ν = 3946.883(2) Mc, g_l=--4.590(4) x 10^-4, μ_l = --1.6856(14)nm. The hyperfine structure anomaly was found to be. Δ = 0.17(9)%. Details of the apparatus constructed for the purpcse of measuring these anomalies in radioactive alkali isotopes are presented, as well as the comparison of the experimental result with values predicted for the anomaly by using various nuclear models and the Bohr-Weisskopf theory.

• Research Organization: Univ. of California, Berkeley, CA (United States)
• Sponsoring Organization: US Atomic Energy Commission (AEC)
• DOE Contract Number: W-7405-ENG-48
• NSA Number: NSA-14-018434
• OSTI ID: 4154901
• Report Number(s): UCRL-9130
• Resource Relation: Other Information: Orig. Receipt Date: 31-DEC-60
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ALKALI METALS
ATOMIC MODELS
ATOMS
BEAMS
BREIT-RABI FORMULA
CONFIGURATION
DIPOLES
ELECTRONS
ENERGY LEVELS
FREQUENCY
GYROMAGNETIC RATIO
HYPERFINE STRUCTURE
MAGNETIC FIELDS
MAGNETIC MOMENTS
MAGNETIC RESONANCE
MEASURED VALUES
NUCLEAR MODELS
NUCLEAR THEORY
NUCLEI
OSCILLATIONS
RUBIDIUM 85
RUBIDIUM 86
SPIN