Elsevier

Nuclear Physics A

Volume 575, Issue 1, 25 July 1994, Pages 125-154
Nuclear Physics A

Exclusive and restricted-inclusive reactions involving the 11Be one-neutron halo

https://doi.org/10.1016/0375-9474(94)90142-2Get rights and content

Abstract

Reactions of a 41 MeV/u beam of the radioactive halo nucleus 11Be have been studied with a counter telescope coupled to an array of neutron detectors covering angles up to 97°. The technique allows to determine single-neutron inclusive and exclusive angular distributions. The targets (Be, Ti and Au) were chosen to illustrate the relative roles played by nuclear and Coulomb mechanisms. The channels leading to 10Be, the dissociation channels, correspond to impact parameters larger than the sum of the radii of the target and the 10Be core. It is shown that for the dissociation process it is possible to account almost quantitatively for the integral, single- and double-differential cross sections from models without free parameters including the Coulomb, Serber and Glauber (diffraction-dissociation) mechanisms. The neutron distributions from the nondissociative reaction channels show little individuality and it is convenient to group them together as the channel “neutron plus anything different from 10Be”. We refer to these as “restricted-inclusive” reactions. These seem to be a promising tool for obtaining accurate information on the halo wave function in momentum coordinates.

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    Supported by Bundesministerium für Forschung und Technologie under contract numbers 06DA 642I and 06MZ 188I.

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