Comparison of the efficiency of several controlled neutron sources

In this article, it is estimated the global efficiency of several controlled neutron sources, i.e. the ratio between the kinetic energy of neutrons generated by the neutron source and the necessary energy (thermal or more generally electric) to generate these neutrons. As the neutrons could only be used after thermalization, the neutrons energy being indifferent in that case, it is also determined the quantity of energy per neutron generated. Comparisons will be made between these neutrons sources.