Can anyone help me in find energy values required for the nuclear fusion of some light elements of the periodic table, example: N+N -> CO?
Any nuclear chemistry or nuclear physics text will help you with this. N+N has a mass of 14.00307+14.00307 mass units. Going to C+O (ignoring minor chemical bond energies) gives a final mass of 12 + 15.99491 mass units. The reactants are 0.01123 mass units heavier. From E=mc^2 this is identical to an energy release that works out to be 10.5 million eV. There is an electrostatic barrier keeping two Ns apart that is roughly equal to a 12 MeV input requirement (corresponding to a temperature of about 140 billion kelvin). Isotopic masses can be found on-line at a variety of sources.
Many thanks! But is that barrier that I would like to know, ... as an example, the reverse fusion... C + O -> N2 would be as dificult or more easy than the N+N -> CO? There are any tables for those processes? With barrier energies and kinetics values?
Various research groups make a living doing theoretical calculations of fusion barriers. Among the most recent is "A systematic study of the fusion barriers using different proximity type potentials for N=Z colliding nuclei: New extensions - Dutt, Ishwar et al. Phys.Rev. C81 (2010) 044615 arXiv:1004.0493" with many cited references and figures. Very roughly, the barrier is 1.2(Z1*Z2)/(A1^1/3 + A2^1/3) MeV. The NN and CO barriers are nearly equal within the realistic uncertainty of the model.
I would like to have a table for all nuclear fusion energies available. Is more for educational porpouses than for research but any way I can't find it easlly... and if someone could let me knouw where to look... I apreciate! Thanks.
The previous response I gave citing a fusion barrier calculation reference does involve quantum mechanical tunneling as part of the understanding of the barrier. But with 100 elements, the number of combinations for fusion (to create a table) exceeds 10000. Furthermore, the actual probability of fusion depends on the energy provided to the combining halves and penetration through barriers (non-classical) become more problematic.
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