Minimum energy for a spin flip?

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SUMMARY

The discussion confirms that a minimum energy is required to flip the intrinsic spin of an electron, which is influenced by the applied magnetic field (B field). The energy necessary for this spin flip is directly related to the spin magnetic moment, specifically its z-component, and is quantified using the Bohr magneton. Techniques such as Magnetic Resonance Imaging (MRI) and Nuclear Magnetic Resonance (NMR) leverage the principle of inducing spin flips, highlighting the practical applications of this phenomenon.

PREREQUISITES
  • Understanding of quantum mechanics and intrinsic spin
  • Familiarity with magnetic fields and their effects on particles
  • Knowledge of the Bohr magneton and its significance
  • Basic principles of MRI and NMR techniques
NEXT STEPS
  • Research the mathematical formulation of the energy associated with spin flips in magnetic fields
  • Study the role of the Bohr magneton in quantum mechanics
  • Explore the applications of NMR in various imaging techniques
  • Investigate the effects of varying B field strengths on electron spin transitions
USEFUL FOR

Physicists, quantum mechanics students, and professionals in medical imaging fields who seek to understand the principles behind electron spin manipulation and its applications in technologies like MRI and NMR.

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Is there a minimum energy to flip the intrinsic spin of an electron from up to down or vice versa? Or does it depend on the applied B field?
 
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pivoxa15 said:
Is there a minimum energy to flip the intrinsic spin of an electron from up to down or vice versa? Or does it depend on the applied B field?

The external B field is necessary to induce a spin flip (spin down to spin up for example). The associated energy depends on this B field but the also on the spin magnetic moment (or more specifically the z-component thereof). This quantity is expressed in terms of a constant called the Bohr magneton. Lots of imaging techniques (MRI) are based upon the principle of "inducing spin flips" (NMR).


marlon
 

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