From: MarkI-ZeroPoint
Atomic absorption spectroscopy does exhibit some phenomena
which are in this range of the EM spectrum, e.g., the 21cm line of hydrogen
which is due to the atomic transition between the two hyperfine levels of
the hydrogen 1s ground state with an energy difference of 5.87433 µeV. Now,
that is way too small of an energy difference to think it could have
anything to do with LENR effects directly…Even this low energy transition (and the Lamb shift) could possibly be utilized in a gainful device if the sequential frequency of transition is pumped by anything “free” and the transition is; but a way to extract the gain needs to be found. In empty space, the time for an isolated atom of hydrogen to undergo this flip transition is millions of years - but that is near absolute zero temperature. At terahertz levels of ambient blackbody vibration of hydrogen in a metal lattice, every million transitions would conceivably give quite a nice bump if they happened near the phonon rate, and if the input power is kept low. This was one way that the late Robert Forward envisioned to collect ZPE. That site is still up but it looks like there are no new publications since he passed away: http://www.quantumfields.com/projects.htm
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