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Phys. Rev. C 66, 014606 (2002) [10 pages]

Polarization transfer measurements for the 13C(p⃗,n⃗)13N reaction at 197 MeV and empirical isovector spin-longitudinal response for the (1/2)g.s.-→(1/2)1+ transition

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X. Wang, J. Rapaport, M. Palarczyk*, C. Hautala, and X. Yang
Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701

D. L. Prout†, B. Anderson, A. R. Baldwin, J. Olmsted, J. W. Watson, and W.-M Zhang
Department of Physics, Kent State University, Kent, Ohio 44242

I. Van Heerden‡ and E. J. Stephenson
Indiana University Cyclotron Facility, Bloomington, Indiana 47405

R. Howes and S. Parks
Department of Physics, Ball State University, Muncie, Indiana 47306

E. Sugarbaker
Department of Physics, The Ohio State University, Columbus, Ohio 43210

B. A. Brown
Department of Physics and Astronomy and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824

F. Sammarruca
Department of Physics, University of Idaho, Moscow, Idaho 83843

Received 1 March 2002; published 17 July 2002

We present differential cross sections and complete sets of polarization-transfer coefficients, Dij, obtained in the 13C(p⃗,n⃗)13N reaction studied at 197 MeV incident proton energy and laboratory angles between 0° and 33°. These complete sets of polarization observables are used to obtain spin-longitudinal and spin-transverse components for transitions to the ground state, to the first, and to the unresolved second and third excited states in 13N at 2.36 MeV and (3.50+3.55) MeV, respectively. The results are used to obtain the two ΔJπ contributions for the ground and first excited state transitions and are compared with corresponding distorted-wave impulse approximation (DWIA) calculations. In particular, empirical angular distribution values for the unique spin-longitudinal ΔJ=0- transition to the first excited state in 13N are obtained and compared with DWIA calculations.

© 2002 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.66.014606
DOI:
10.1103/PhysRevC.66.014606
PACS:
25.40.Kv, 24.70.+s

*Permanent address: Henryk Niewodniczański Institute of Nuclear Physics, 31-342 Kraków, Poland.

†Permanent address: DOE Remote Sensing Lab., Las Vegas, Nevada 89115.

‡Permanent address: University of the Western Cape, South Africa.

 
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