Search for B-21

概要

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Copyright notice(c)2003 American Physical Society. All rights reserved. Publisher's version: http://prola.aps.org/abstract/PRC/v67/i1/e014610An attempt was made to find the very neutron-rich isotope B-21 among the fragmentation of a 94A MeV Ar-40 beam. Evidence for the particle instability of B-21 was obtained. As part of the search, the production cross sections of 13 light neutron-rich nuclei with Be and Ta targets are presented and compared to previous data. A large enhancement of the production cross sections for a Ta target is shown and a clear energy dependence of the production cross sections is shown for very neutron-rich nuclei.