Phys. Rev. Lett. 79, 201 - 204 (1997)
Large Spin Alignment of the Unbound 5He Fragment after Fragmentation of 240 MeV/nucleon 6He
L. V. Chulkov et al.
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L. V. Chulkov1, T. Aumann2, D. Aleksandrov1, L. Axelsson3, T. Baumann4, M. J. G. Borge5, R. Collatz4, J. Cub4, W. Dostal2, B. Eberlein2, Th. W. Elze6, H. Emling4, H. Geissel4, V. Z. Goldberg1, M. Golovkov1, A. Grünschloss6, M. Hellström4, J. Holeczek7, R. Holzmann4, B. Jonson3, A. A. Korsheninnikov8, J. V. Kratz2, G. Kraus4, R. Kulessa9, Y. Leifels4, A. Leistenschneider6, T. Leth10, I. Mukha1,10, G. Münzenberg4, F. Nickel4, T. Nilsson3, G. Nyman3, B. Petersen10, M. Pfützner4, A. Richter11, K. Riisager10, C. Scheidenberger4, G. Schrieder11, W. Schwab4, H. Simon11, M. H. Smedberg3, M. Steiner12, J. Stroth6, A. Surowiec7, T. Suzuki8, and O. Tengblad5
1Kurchatov Institute, R-123182 Moscow, Russia
2Institut für Kernchemie, Johannes Gutenberg-Universität, D-55099 Mainz, Germany
3Fysiska Institutionen, Chalmers Tekniska Högskola och Göteborgs Universitet, S-412 96 Göteborg, Sweden
4Gesellschaft für Schwerionenforschung (GSI), D-64291 Darmstadt, Germany
5Instituto Estructura de la Materia, Consejo Superior de Investigaciones Científicas, E-28006 Madrid, Spain
6Institut für Kernphysik, Johann-Wolfgang-Goethe-Universität, D-60486 Frankfurt, Germany
7Institute of Physics, University of Silesia, Katowice, Poland
8RIKEN, 2-1 Hirosawa, Wako, Saitama 351-01, Japan
9Instytut Fizyki, Uniwersytet Jagelloński, PL-30-059 Kraków, Poland
10Institut for Fysik og Astronomi, Aarhus Universitet, DK-8000 Aarhus C, Denmark
11Institut für Kernphysik, Technische Hochschule, D-64289 Darmstadt, Germany
12Michigan State University, East Lansing, Michigan 48824-1321
Received 7 February 1997
Peripheral fragmentation of a 240 MeV/nucleon beam of the halo nucleus 6He incident on carbon target has been studied in a kinematically complete experiment. It is found that one-neutron stripping to the unbound nucleus 5He is the dominant fragmentation mechanism and that it leads to a spin alignment of 5He in a plane perpendicular to the 5He momentum vector. This is expected to be a common feature for all neutron halo nuclei.
©1997 The American Physical Society
URL: http://link.aps.org/doi/10.1103/PhysRevLett.79.201
DOI: 10.1103/PhysRevLett.79.201
PACS: 25.60.Gc, 24.70.+s, 27.10.+h
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