Observation of the acceleration by an electromagnetic field of nuclear beta decayH. R. Reiss
American University - Washington, DC 20016-8058, USA and Max Born Institute - 12489 Berlin, Germany
received 9 September 2007; accepted in final form 7 December 2007; published February 2008
published online 11 January 2008
Measurements are reported of the acceleration of the first-forbidden beta decay of 137Cs 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 (6.83.2)10-4 relative to the natural rate, and the other resulted in an increase of (6.52.0)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.
23.40.-s - decay; double decay; electron and muon capture.
23.90.+w - Other topics in radioactive decay and in-beam spectroscopy.
28.90.+i - Other topics in nuclear engineering and nuclear power studies.
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