New isotope<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Si</mml:mi><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>44</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>and systematics of the production cross sections of the most neutron-rich nuclei
O. TarasovNational Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USAT. BaumannMichigan State UniversityA. M. AmthorDepartment of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USAD. BazinNational Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USAC. M. FoldenMichigan State UniversityA. GadeDepartment of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USAT. N. GinterNational Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USAM. HausmannNational Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USAM. MátosMichigan State UniversityD. J. MorrisseyDepartment of Chemistry, Michigan State University, East Lansing, Michigan 48824, USAA. NettletonNational Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USAM. PortilloMichigan State UniversityA. SchillerMichigan State UniversityB. M. SherrillNational Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USAA. StolzMichigan State UniversityM. ThoennessenDepartment of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
2007lv
ABI
Annotatsiya
The results of measurements of the production of neutron-rich nuclei by the fragmentation of a $^{48}\mathrm{Ca}$ beam at 142 MeV/nucleon are presented. Evidence was found for the production of a new isotope that is the most neutron-rich silicon nuclide, $^{44}\mathrm{Si}$, in a net neutron pickup process. A simple systematic framework was found to describe the production cross sections based on thermal evaporation from excited prefragments that allows extrapolation to other weak reaction products.
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