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Atomic Nuclei: Nuclear Spin01:08

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All atomic particles possess an intrinsic angular momentum, or 'spin'. Electrons, protons, and neutrons each have a spin value of ½, although protons and neutrons in nuclei may have higher half-integer spins owing to energetic factors.
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NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of one, the...
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Near absolute zero temperatures, in the presence of a magnetic field, the majority of nuclei prefer the lower energy spin-up state to the higher energy spin-down state. As temperatures increase, the energy from thermal collisions distributes the spins more equally between the two states. The Boltzmann distribution equation gives the ratio of the number of spins predicted in the spin −½ (N−) and spin +½ (N+) states.
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In ordinary chemical reactions, the nucleus — which contains the protons and neutrons of each atom and thus identifies the element — remains unchanged. Electrons, however, can be added to atoms by transfer from other atoms, lost by transfer to other atoms, or shared with other atoms. The transfer and sharing of electrons among atoms govern the chemistry of the elements. During the formation of some compounds, atoms gain or lose electrons to form electrically charged particles called...
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Synthesis of Nine-atom Deltahedral Zintl Ions of Germanium and their Functionalization with Organic Groups
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Publisher Correction: Spin-controlled atom-ion chemistry.

Tomas Sikorsky1, Ziv Meir2, Ruti Ben-Shlomi2

  • 1Department of Physics of Complex Systems, Weizmann Institute of Science, 7610001, Rehovot, Israel. tomas.sikorsky@weizmann.ac.il.

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|April 25, 2018
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Summary
This summary is machine-generated.

This study details corrections to a previous article on spin polarization of strontium ions (Sr+) using ultracold atoms. Key corrections involve collision rates, ion species identification, and energy scales in quantum experiments.

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Area of Science:

  • Atomic, Molecular, and Optical Physics
  • Quantum Information Science

Background:

  • Accurate experimental data is crucial for advancing quantum technologies.
  • Previous research explored spin polarization of strontium ions (Sr+) using ultracold atoms.

Purpose of the Study:

  • To correct factual errors in a published article regarding Sr+ ion spin polarization.
  • To ensure the scientific record accurately reflects experimental parameters and findings.

Main Methods:

  • Review and correction of specific sentences within the Results and Discussion sections.
  • Clarification of Langevin collision rates, ion species (Sr+ vs. Sr), and energy scales (mK).

Main Results:

  • Corrected the Langevin collision rate to include units of kHz.
  • Updated the ion species from neutral strontium (Sr) to strontium ion (Sr+).
  • Revised the energy gap from 330 m to 330 mK.

Conclusions:

  • The corrected article provides a more accurate representation of the experimental setup and results.
  • Ensuring data integrity is vital for reproducibility and further research in quantum spin polarization.