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

doi:https://doi.org/10.2172/4154901

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

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Abstract

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 ⁸⁵ and Rb ⁸⁶. 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 Rb ⁸⁵ 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 Rb ⁸⁶ 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.

Authors:

Braslau, Norman ^[1]

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

Publication Date:: 1960-03-21

Research Org.:: Univ. of California, Berkeley, CA (United States)

Sponsoring Org.:: US Atomic Energy Commission (AEC)

OSTI Identifier:: 4154901

Report Number(s):: UCRL-9130

NSA Number:: NSA-14-018434

DOE Contract Number:: W-7405-ENG-48

Resource Type:: Thesis/Dissertation

Resource Relation:: Other Information: Orig. Receipt Date: 31-DEC-60

Country of Publication:: United States

Language:: English

Subject:: 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

Citation Formats


                    Braslau, Norman. The rubidium-85-rubidium-86 hyperfine-structure anomaly.  United States: N. p., 1960. 
        Web.  doi:10.2172/4154901.

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                    Braslau, Norman. The rubidium-85-rubidium-86 hyperfine-structure anomaly.  United States.  https://doi.org/10.2172/4154901

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                    Braslau, Norman. Mon .  
        "The rubidium-85-rubidium-86 hyperfine-structure anomaly".  United States.  https://doi.org/10.2172/4154901.  https://www.osti.gov/servlets/purl/4154901.

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@article{osti_4154901,

  title        = {The rubidium-85-rubidium-86 hyperfine-structure anomaly},

  author       = {Braslau, Norman},

  abstractNote = {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 2S1/2 electronic ground state: Δ ν = 3946.883(2) Mc, gl=--4.590(4) x 10-4, μl = --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.},

  doi          = {10.2172/4154901},

  url          = {https://www.osti.gov/biblio/4154901},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1960},

  month        = {3}

}

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