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Phys. Rev. Lett. 90, 202502 (2003) [4 pages]

Spin Polarization of 37K Produced in a Single-Proton Pickup Reaction at Intermediate Energies

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D. E. Groh1,2, P. F. Mantica1,2, A. E. Stuchbery1,3, A. Stolz1, T. J. Mertzimekis1, W. F. Rogers4, A. D. Davies1,5, S. N. Liddick1,2, and B. E. Tomlin1,2
1National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
2Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
3Department of Nuclear Physics, Research School of Physical Sciences and Engineering, The Australian National University, Canberra, ACT 0200, Australia
4Department of Physics, Westmont College, Santa Barbara, California 93108, USA
5Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA

Received 23 January 2003; published 21 May 2003

Spin polarization of 37K nuclei produced via single proton pickup from a 9Be target by a beam of 150  MeV/nucleon 36Ar has been observed. Positive spin polarization with magnitude (8.5±0.6)% was deduced near the peak of the 37K momentum distribution. The variation of the spin polarization as a function of outgoing 37K momentum is explained by a classical conservation model, as previously applied to describe the induced spin polarization observed for fragments produced in intermediate-energy heavy-ion reactions, with the condition that the picked-up proton has an average momentum equal to the Fermi momentum and is aligned along the incident beam direction.

© 2003 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.90.202502
DOI:
10.1103/PhysRevLett.90.202502
PACS:
24.70.+s, 25.70.–z, 27.30.+t
 
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