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The total magnetic moment of an electron, a key concept in Quantum Mechanics and Atomic Physics, is the measure of the electron's magnetic dipole moment. It is influenced by the electron's orbital and spin angular momenta. Calculating the total magnetic moment involves important variables such as the Landé g-factor, total quantum numbers, and the Bohr magneton.

Total Magnetic Moment (μ) = |

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The total magnetic moment of an electron is given by the following formula:

μ = g √j(j + 1) μ_{B}

Where:

- μ is the total magnetic moment of the electron.
- g is the Landé g-factor, which depends on the quantum numbers of the electron.
- j is the total quantum number, a composite quantity that takes into account both the electron's orbital and spin angular momenta.
- μ
_{B}is the Bohr magneton, a physical constant and the natural unit for expressing the magnetic moment of an electron caused by either its orbital or spin angular momentum.

The calculation of the total magnetic moment of an electron was refined with the introduction of quantum mechanics, specifically through the work of Alfred Landé who introduced the Landé g-factor. This formula is integral to the Quantum Theory of Angular Momentum and the Zeeman Effect.

This calculation plays a significant role in Magnetic Resonance Imaging (MRI), a medical imaging technique used in radiology to form pictures of the anatomy and the physiological processes of the body. It helps in producing the contrast in the images, which allows medical professionals to distinguish between different types of tissues.

Alfred Landé, a German-American physicist, is renowned for his contributions to quantum theory, specifically the introduction of the Landé g-factor. Niels Bohr, a Danish physicist, also made significant contributions to atomic physics and quantum theory, including the concept of the Bohr magneton.

- The measurement and understanding of magnetic moments, including the total magnetic moment of an electron, are integral to the development and functioning of Magnetic Resonance Imaging (MRI), a groundbreaking technology in medical diagnostics.
- The Landé g-factor, a crucial part of the formula, was named after Alfred Landé who was a prominent figure in the development of quantum mechanics.
- The understanding of the electron's magnetic moment and its implications has profoundly shaped our understanding of atomic structure and interactions.

The total magnetic moment of an electron is a fundamental concept in Quantum Mechanics and Atomic Physics. It continues to hold significant theoretical interest, while its practical implications, as seen in technologies like MRI, underscore its importance in our daily lives. It stands as an exemplar of the powerful insights quantum theory can provide into the microscopic world.

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