The possibility is discussed that the enhanced clustering in the nuclear surface of some nuclei observed by Samanta et al. [Phys. Rev. C 26, 1379 (1982)] is due to the modification of the wave function of a discrete nuclear state at the nuclear surface by unbound states. The modification is formulated in a model with unified description of bound and unbound states. Experimental data from knockout reactions on odd nuclei are necessary in order to test the theoretical statements.

[NUCLEAR REACTIONS Cluster knockout, light nuclei, spectroscopic factors, continuum shell model, nuclear surface.]

• Received 28 February 1983

DOI:https://doi.org/10.1103/PhysRevC.29.1119