I have been searching for something along the line of what I have suggested and find this abstract which is the sort of thing I am asking about here.
Abstract – "Measurements are reported of the acceleration of the first-forbidden beta decay of
137 Cs by exposure to intense, low-frequency electromagnetic fields. Two separate experiments were
done: one in a coaxial cavity, and the other in a coaxial transmission line. The first showed an
increase in the beta decay rate of (6.8 ± 3.2) × 10−4 relative to the natural rate, and the other
resulted in an increase of (6.5± 2.0) × 10−4. In addition, a Fourier analysis of the rate of 662 keV
gamma emission following from the beta decay in the standing-wave experiment showed a clear
indication of the frequency with which the external field was switched on and off. A simultaneously
detected gamma emission from a placebo nucleus showed no such peak."
http://www.iop.org/EJ/article/0295-5075/81/4/42001/epl_81_4_42001.pdf?request-id=028447a3-0f68-484c-8e02-53f35beb5903