In reply to Axil Axil's message of Fri, 12 Jul 2013 19:43:21 -0400: Hi, [snip] >What causes the defeat of coulomb barrier? > > > > > >Mixent - kinetic energy of nuclear collision. > > > > > >Axil EMF- namely charge concentration and anapole magnetism. > > > > > > > >The defeat of the coulomb barrier cant be kinetic energy because from the >experience gained with the kinetic collisions of nuclei we know that the >resultant nucleus would be left excited by the kinetic energy of that >nuclear collision and affect the combined nucleus by exciting it leaving a >radioactive isotope as an end product. > > > > > >Internal rearrangement of the combined nuclei by EMF does not carry excess >energy of collision into the reaction therefore no radioactive isotope is >produced
Kinetic energy only contributes to the overall energy of the reaction. What comes out is not necessarily related to the fact that kinetic energy played a role. E.g. conventional fission in U235 is best triggered by a slow moving neutron with as little kinetic energy as possible, since low kinetic energy enhances the cross section. Despite the lack of initial kinetic energy, the result is usually a plethora of radioactive nuclei. The primary reason for this is simply that relative to its lighter daughter nuclei, U235 has an excess of neutrons. That means that the daughter nuclei are neutron rich, and hence radioactive. When light nuclei combine at high speed, the resultant momentary "heavy" nucleus is neutron poor (compared to normal stable nuclei of the same combined weight), hence the immediate fission nuclei from the combined nucleus will not be neutron rich, and hence not likely to be radioactive. If it doesn't have to, nature actually prefers not to make radioactive nuclei. Regards, Robin van Spaandonk http://rvanspaa.freehostia.com/project.html
