Total reaction and neutron-removal cross sections of (30-60)A MeV Be isotopes on Si and Pb

Details Total reaction and neutron-removal cross sections of (30-60)A MeV Be isotopes on Si and Pb Total reaction and neutron-removal cross sections of (30-60)A MeV Be isotopes on Si and Pb

Oct 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001phrvc..64d4611w&link_type=abstract

Physical Review C (Nuclear Physics), Volume 64, Issue 4, October 2001, p.044611

Physics

Nuclear Physics

6

Interaction And Reaction Cross Sections, Low And Intermediate Energy Heavy-Ion Reactions, 6<=A<=19

Scientific paper

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.

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