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Phys. Rev. C 75, 064613 (2007) [5 pages]

New isotope 44Si and systematics of the production cross sections of the most neutron-rich nuclei

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O. B. Tarasov1,2,*, T. Baumann1, A. M. Amthor1,3, D. Bazin1, C. M. Folden III1, A. Gade1,3, T. N. Ginter1, M. Hausmann1, M. Matos1, D. J. Morrissey1,4, A. Nettleton1,3, M. Portillo1, A. Schiller1, B. M. Sherrill1,3, A. Stolz1, and M. Thoennessen1,3
1National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
2Flerov Laboratory of Nuclear Reactions, JINR, RU-141980 Dubna, Moscow region, Russian Federation
3Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
4Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA

Received 30 March 2007; published 25 June 2007

The results of measurements of the production of neutron-rich nuclei by the fragmentation of a 48Ca 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, 44Si, 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.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.75.064613
DOI:
10.1103/PhysRevC.75.064613
PACS:
27.40.+z, 25.70.Mn

*tarasov@nscl.msu.edu

 
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