Abstract:
We observed that in an amorphous substance containing protons (Teflon, polystyrene), the energy of the high-frequency field is absorbed due to such transitions. In this case, there are two levels, the distance between which, in accordance with the formula h?=2µH, corresponds to a frequency ?, approximately equal to 20 MHz, at our value of the magnetic field. Although at room temperature h?/kT˜?10?^(-5), the difference in the populations of these two levels is very small, the number of nuclei participating in this process is so large that a measurable effect can be expected at thermal equilibrium.
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