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Atomic Absorption Spectroscopy: Atomization Methods01:25

Atomic Absorption Spectroscopy: Atomization Methods

599
Atomic Absorption Spectroscopy (AAS) atomizes samples through flame atomization or electrothermal atomization. Flame atomization typically involves a nebulizer and spray chamber assembly to combine the sample with a fuel–oxidant mixture, creating a fine aerosol mist that enters a burner. Typically, the fuel and oxidant are combined in an approximately stoichiometric ratio. However, for atoms that are easily oxidized, a fuel-rich mixture may be more advantageous. Only about 5% of the...
599

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Related Experiment Video

Updated: Aug 14, 2025

Epitaxial Growth of Perovskite Strontium Titanate on Germanium via Atomic Layer Deposition
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Epitaxial Growth of Perovskite Strontium Titanate on Germanium via Atomic Layer Deposition

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Microfabricated strontium atomic vapor cells.

Jacob M Pate, John Kitching, Matthew T Hummon

    Optics Letters
    |January 13, 2023
    PubMed
    Summary
    This summary is machine-generated.

    We developed compact, high-temperature strontium (Sr) atomic vapor cells that operate over 300°C for 380+ hours. These cells enable precise optical frequency references using Sr atomic transitions.

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    Area of Science:

    • Atomic Physics
    • Quantum Optics
    • Materials Science

    Background:

    • Atomic vapor cells are crucial for optical frequency standards.
    • High-temperature operation and long-term stability are key challenges.
    • Strontium (Sr) offers desirable properties for atomic clocks.

    Purpose of the Study:

    • To demonstrate a compact, manufacturable, high-temperature atomic vapor cell for strontium.
    • To investigate the operational stability and performance of such cells.
    • To enable narrow-line optical frequency references based on strontium.

    Main Methods:

    • Fabrication of micromachined silicon frames anodically bonded to glass windows.
    • Coating interior glass surfaces with a 20-nm Al2O3 protective layer.
    • Laser absorption spectroscopy at 461 nm to confirm Sr vapor and measure linewidths.

    Main Results:

    • Demonstrated Sr atomic vapor cells with a 0.63 cm³ external volume.
    • Achieved stable operation above 300°C for over 380 hours.
    • Observed negligible (<3 MHz) linewidth broadening due to residual gas collisions.

    Conclusions:

    • Developed a compact and manufacturable high-temperature atomic vapor cell.
    • The cell design ensures long-term stability and minimal spectral broadening.
    • This technology can advance narrow-line optical frequency references using strontium and other alkaline earth atoms.