%0 Journal Article %T Experimental Evidence for Variability in Planck¡¯s Constant %A Richard A. Hutchin %J Optics and Photonics Journal %P 124-137 %@ 2160-889X %D 2016 %I Scientific Research Publishing %R 10.4236/opj.2016.66015 %X Annual variations of 1000 - 3000 ppm (peak-to-valley) have been observed in the decay rates of 8 radionuclides over a 20 year span by six organizations on three continents, including beta decay (weak interaction) and alpha decay (strong interaction). In searching for a common cause, we hypothesized that small variations in Planck¡¯s constant might account for the observed synchronized variations in strong and weak decays. If so, then h would be a maximum around January-February of each year and a minimum around July-August of each year based on the 20 years of radioactive decay data. To test this hypothesis, a purely electromagnetic experiment was set up to search for the same annual variations. From Jun 14, 2011 to Jan 29, 2014 (941 days), annual variations in tunneling voltage through 5 parallel Esaki tunnel diodes were recorded. It found annual variations of 826 ppm peak-to-valley peaking around Jan 1. These variations lend support to the hypothesis that there is a gradient in h of about 21 ppm across the Earth¡¯s orbit. %K Planck¡¯s Constant %K Variable Radioactive Decay Rate %K Variable Plank¡¯s Constant %U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=67879