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arXiv · 0908.3852

Production of very neutron-rich nuclei with a 76Ge beam

O. B. Tarasov·M. Portillo·A. M. Amthor·T. Baumann·D. Bazin·A. Gade·T. N. Ginter·M. Hausmann·N. Inabe·T. Kubo·D. J. Morrissey·A. Nettleton·J. Pereira·B. M. Sherrill·A. Stolz·M. Thoennessen
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Abstract

Production cross sections for neutron-rich nuclei from the fragmentation of a 76Ge beam at 132 MeV/u were measured. The longitudinal momentum distributions of 34 neutron-rich isotopes of elements 13 <= Z <= 27 were scanned using a novel experimental approach of varying the target thickness. Production cross sections with beryllium and tungsten targets were determined for a large number of nuclei including 15 isotopes first observed in this work. These are the most neutron-rich nuclides of the elements 17 <= Z <= 25 (50Cl, 53Ar, 55,56K, 57,58Ca, 59,60,61Sc, 62,63Ti, 65,66V, 68Cr,70Mn). A one-body Qg systematics is used to describe the production cross sections based on thermal evaporation from excited prefragments. Some of the fragments near 58Ca show anomalously large production cross sections.

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O. B. Tarasov, M. Portillo, A. M. Amthor, T. Baumann, D. Bazin, A. Gade, T. N. Ginter, M. Hausmann, N. Inabe, T. Kubo, D. J. Morrissey, A. Nettleton, J. Pereira, B. M. Sherrill, A. Stolz, M. Thoennessen. 2009-08-26. Production of very neutron-rich nuclei with a 76Ge beam. https://doi.org/10.1103/physrevc.80.034609

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