Because electrons are known to be participants in the beta-decay reaction, electron density has been shown to influence the rate of beta decay: http://prl.aps.org/abstract/PRL/v98/i25/e252501 http://www.phys.ncku.edu.tw/mirrors/physicsfaq/ParticleAndNuclear/decay_rates.html http://www.hps.org/publicinformation/ate/q7843.html So how could this be used for practical purposes? I've read about beta-batteries being used for applications where you want a long-lived power source. But how much current are they capable of supplying? In situations where electron density influences rate of beta decay, then since electron density can be dynamically adjusted, then does this mean that beta-decay rates can likewise be dynamically adjusted on the fly? Since neutrinos are also participants in beta-decay, then could neutrino density similarly affect beta-decay rate? Could suitable beta-decay reaction isotope species then be the basis for a neutrino detector? Beta-decay then allows the electronic world to overlap with the nuclear world. But like that story of passing a camel through the eye of a needle, does beta-decay likewise influence any other nuclear processes - like alpha-decay, for example?