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Related Concept Videos

Cooperative Allosteric Transitions01:58

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Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...
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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...
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Interference leads to systematic error in atomic absorption (AA) measurements by enhancing or diminishing the analytical signal or the background. These interferences can be grouped into three main categories: spectral interference, chemical interference, and physical interference.
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Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
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Related Experiment Video

Updated: Feb 4, 2026

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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Note: Simultaneous modulation transfer spectroscopy on transitions of multiple atomic species for compact laser

Moritz Mihm1, Kai Lampmann1, André Wenzlawski1

  • 1Johannes Gutenberg-Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany.

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Summary

This study introduces a new method for stabilizing laser frequencies on multiple atomic transitions simultaneously using a single optical setup. This technique simplifies laser frequency control for applications requiring precise atomic references.

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Area of Science:

  • Atomic Physics
  • Spectroscopy
  • Laser Technology

Background:

  • Precise laser frequency control is crucial for many scientific and technological applications.
  • Simultaneous stabilization on multiple atomic species often requires complex and bulky optical setups.

Purpose of the Study:

  • To develop a technique for simultaneous laser frequency stabilization on multiple atomic species using a single optical setup.
  • To demonstrate the feasibility of this technique for key atomic transitions.

Main Methods:

  • Utilizing modulation transfer spectroscopy.
  • Separating spectroscopic signals by employing distinct modulation frequencies.
  • Employing electronic filtering for signal isolation.

Main Results:

  • Successfully demonstrated simultaneous spectroscopy on potassium D1, D2, and rubidium D2 transitions.
  • Validated the technique's capability for multiple atomic species with a single optical setup.

Conclusions:

  • The presented technique offers a versatile and compact solution for laser frequency stabilization.
  • This method can be extended to other atomic species, enabling the development of advanced frequency reference modules.