Home Forums Hyperfine course ERP EPR on free atoms (2) First answer

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    DMauricio34
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    When a free La atom is placed in an external magnetic field, its unpaired electron’s magnetic moment aligns with or against the field, whichs splits the energy levels. If it absorbs a microwave photon that matches the energy difference between these levels, the electron changes its spin, transitioning to the higher energy state. This absorption is detected and measured for the EPR method.

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