[en] This work deals with the halation nuclei. Atomic nuclei rich in neutrons and protons are surrounded by an halation. Their studies inform us on the nuclear cohesion strengths. The answer to the question : how neutrons and protons combine to form halation nuclei is given in the first part. Then are reported the experiments carried on the lithium 11 nuclei. The third part is a description of the different theories given on the matching of two halation neutrons. The last part speaks about the future of halation. (O.L.). 5 refs., 5 figs