Phys. Rev. C 64, 044611 (2001) [9 pages]Total reaction and neutron-removal cross sections of (30–60)A MeV Be isotopes on Si and PbReceived 8 March 2001; published 24 September 2001 Total reaction cross sections σR of all particle-stable Be isotopes on Si, and several of their neutron-removal cross sections σ-xn, were measured near (30–60)A MeV by injecting magnetically separated, focused, monoenergetic secondary beams of these projectiles into a telescope containing nine Si transmission detectors. Similar measurements were made for 10-12Be on Pb, by placing Pb targets between the Si detectors of another telescope. A Glauber analysis of the Be+Si σR data, including only nuclear forces, yields rms radii for the Be isotopes in general agreement with those found by other workers. Similar calculations underpredict the σR data for Be+Pb, showing the importance of electromagnetic dissociation. A simple microscopic theory reproduces the n-removal cross sections for 11Be and 14Be on Si, but overpredicts n removal for 11Be on Pb. For 12Be incident upon both Si and Pb targets, σ-2n significantly exceeds σ-n, as is expected since 1n removal leaves the weakly bound halo nucleus 11Be. A similar effect for 10Be on Si is attributed to the weak binding of the last neutron of 9Be; however, for 10Be+Pb, σ-n slightly exceeds σ-2n. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevC.64.044611
DOI:
10.1103/PhysRevC.64.044611
PACS:
25.60.Dz, 25.70.-z, 27.20.+n
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