ISSN:
1434-601X
Keywords:
PACS:25.70.Hi Transfer reactions – 24.70.+s Polarization phenomena in reactions – 24.10.Eq Coupled-channel and distorted-wave models
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract: The 16O(13C,12C)17O reaction at 50 MeV has been investigated using the kinematical coincidence method. Polarization tensors t 20 and t 40 of 12C[2+ 1] for the quantization axis taken along the direction of propagation have been measured by analyzing the energy spectrum of 12C[2+ 1], modulated by the effect of γ ray emission. The deduced t 40 values significantly deviate from zero, contrary to the prediction of the distorted-wave Born approximation theory based on one-step p shell neutron stripping without spin-dependent interactions. The phenomenological spin–orbit interaction necessary to reproduce the magnitude of measured t 40 is found to be much larger than the folding model prediction. It is shown that the experimental polarization tensors as well as the cross sections can be reproduced by introducing multi-step processes involving excitations in 12C and 13C without introducing spin-dependent interactions.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/PL00013650
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