Readers of my most recent book, The SS Brotherhood of the Bell, will recall my brief mention of the hafnium 178 m2 spin isomer in connection with the Bell's mysterious "IRR-Xerum 525". It may be worth explaining further why I mentioned it. Hafnium isomers were first discovered, if I recall correctly, by none other than Otto Hahn. The metastable-2 form of this isomer is extremely stable, and the tremendous energies locked within the element have, as yet, not been released successfully. But there is a controversy with that claim, and with the controversy comes the reason why I mentioned the isomer in the book.
Recently a physicist from the University of Texas at Austin claimed to have released the pent up energies of the isomer by bomnbarding it with a dental x-ray machine. The results were published in a peer-reviewed journal, but almost immediately came under fire from other scientists who disputed the results on various grounds. It's probably safe to say that they're right, and that the claimed release from such miniscule and commonplace means were probably due to other causes or misinterpreted data.
Which brings us to the Bell. While dental x-ray machines might not have been enough to release the isomer's tremendous pent-up energies, the high rpm of the counter-rotating cylinders in the Bell, coupled with the tremendous high voltages and electrical stresses involved with the device, might just have done the trick if spin isomers were chemical constituents of the mysterious compound "IRR-Xerum" 525 that was involved with the device. Highly speculative, to be sure, but it's worth mentioning.