Spin polarization of {sup 34}Al fragments produced by nucleon pickup at intermediate energies
- Instituut voor Kern-en Stralingsfysica, K. U. Leuven, B-3001 Leuven (Belgium)
- Dipartimento di Fisica, Universita di Camerino, I-62032 Camerino (Italy)
- CEA/DIF/DPTA/PN, BP 12, F-91680 Bruyeres le Chatel (France)
- GANIL, BP 55027, F-14076 Caen Cedex 5 (France)
- FLNR-JINR, Department of Physics, RU-141980 Dubna (Russian Federation)
The polarization of {sup 34}Al fragments, produced by single neutron pickup from a {sup 9}Be target by a {sup 36}S projectile at 77.5 MeV/nucleon, have been observed at GANIL via the detection of resonantly destroyed {beta}-asymmetry. The reaction-induced polarization is deduced using a tentative spin/parity assignment for the {sup 34}Al ground state. A positive polarization was measured near the peak of the {sup 34}Al yield curve. A kinematical model based on the spectator-participant model for projectile fragmentation reactions has been extended in order to take into account the features of pickup reactions, i.e., the picked-up nucleon having an average momentum equal to the Fermi momentum and aligned along the incident beam direction. The trend-line in the observed spin-orientation is very well reproduced by this model.
- OSTI ID:
- 20771439
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 73, Issue 4; Other Information: DOI: 10.1103/PhysRevC.73.044313; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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