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Electron spin resonance dating wikipedia

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I moved some of the introductory material to sections further down in the article. This allows the reader to see the contents box more easily. I deleted the above sentence as I could not readily see how raising a spectrometer's frequency would cause the upper energy state to be more populated. It seems that just the opposite would be true. Am I missing something?
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EPR: Theory

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Electron spin resonance dating — Wikipedia Republished // WIKI 2

Electric dipole spin resonance EDSR is a method to control the magnetic moments inside a material using quantum mechanical effects like the spin—orbit interaction. Mainly, EDSR allows to flip the orientation of the magnetic moments through the use of electromagnetic radiation at resonant frequencies. Computer hardware employs the electron charge in transistors to process information and the electron magnetic moment or spin for magnetic storage devices. The emergent field of spintronics aims in unifying the operations of these subsystems. For achieving this goal, the electron spin should be operated by electric fields. In atoms, electron orbital and spin dynamics are coupled to the electric field of the protons in the atomic nucleus according to the Dirac equation. This enhancement of the coupling between the orbital and spin dynamics in massive atoms originates from the strong attraction to the nucleus and the large electron speeds.
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Electron paramagnetic resonance EPR or electron spin resonance ESR spectroscopy is a method for studying materials with unpaired electrons. The basic concepts of EPR are analogous to those of nuclear magnetic resonance NMR , but it is electron spins that are excited instead of the spins of atomic nuclei. EPR spectroscopy is particularly useful for studying metal complexes or organic radicals.
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Unlike radiometric methods based on the measurement of radioactive growth or decay of isotopes e. Indeed, for Electron Spin Resonance ESR dating of tooth enamel, the origin of the sample as well as its sedimentary context must be well known to ensure an accurate dose rate reconstruction. The systematic record of sampling data in the field appears to be essential for the implementation of the method and thus the calculation of reliable age results.
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