/* I did wonder if there was some kind of link between your Hyd and H(0) */
What Randall Mills is often saying, the subquantum hydrino states are stabilized by spherical orbitals, which cannot radiate easily - i.e. in similar way, like the alleged Rydberg states of Holmlid (see the note above).
This is commonly known stuff: the spherical antennae/orbitals are poor radiators and their energy transitions are therefore difficult "forbidden". https://en.wikipedia.org/wiki/Forbidden_mechanism
The conditions of Holmlid experiments are also more close to Randal Mill's ones, rather than other cold fusion experiments (as Holmlid once admitted himself). The infrared lasers which Holmlid is using are often used as a source of far ultraviolet (XUL) radiation - i.e. this one, on which Randal Mills based the original name of his BlackLight company: his hydrino states allegedly manifest itself by far ultraviolet spectra. IMO these two research routes converge each other - for many physicists the idea of Rydberg states would be more palatable, than the hydrino hypothesis based on existence of subquantum states. It would confirm my long term suspicion, that the Randall Mills experiments are actually cold fusion experiments with Rydberg states of matter. My greatest problem with hydrino hypothesis is, if its formation releases so much of energy, then most of hydrogen in the universe should be already converted into a hydrino. Which we don't observe.
The reason, why the electrons don't fall into subquantum states more close to atom nuclei are the omnipresent quantum density fluctuations of vacuum, which keep them in motion. The fundamental quantum states aren't therefore metastable with respect to subquantum ones, but fully equillibrial: if the electrons would accidentally fall more close to atom nuclei, then it would be kicked out of here back again by turbulent vacuum. Therefore the subquantum energy states may exist as a metastable states - but could they produce a surplus of energy? I seriously doubt it: there is no good both physical, both experimental reason for it.