LOW-ENERGY LEVEL DISTRIBUTIONS OF LIGHT NUCLEI

By following a procedure suggested by Ericson, the cumulative number of low-energy levels of residual nuclei in statistical reactions, is analysed. The analysis shows that the Lang and Le Couteur level density based on the Fermi gas model of the nucleus, with a fixed set of average parameters obtained by analysing slow neutron resonance spacings, level widths at high excitation energy, energy spectra of particles emitted in statistical reactions, fits with a good accuracy, the real level density of light nuclei (A ≦70) also for very low excitation energies. © 1969.