Minimum energy for a spin flip?

pivoxa15 · Apr 29, 2007

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?

marlon · Apr 29, 2007

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

Minimum energy for a spin flip?

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Minimum energy for a spin flip?

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