Method for generating neutrons

A method for generating neutrons comprising the successive steps:

• a) placing at least one beam of electrons and at least one beam of nuclei chosen from protons, deuterons and tritons in a defined spin state, and
• b) causing said at least one beam of nuclei and at least one beam of electrons to collide along a collision direction,
• wherein, in the step b), the spins of the electrons and of the nuclei are aligned in a same direction as the collision direction by application of a first magnetic field applied to the nuclei and a second magnetic field applied to the electrons, and
• wherein, in the step b), the spins of the electrons, respectively of the nuclei, and velocity vectors of the electrons, respectively of the nuclei, are collinear, and
• wherein at least 50% of the nuclei forming the beam of nuclei have an energy between 1 and 107 eV and/or at least 50% of the electrons forming the beam of electrons have an energy between 1 and 107 eV.