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Nuclear transparency and the onset of strong absorption regime in the 12C+24Mg system

R. Lichtenthaeler·A. Lepine-Szily·M. S. Hussein
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Abstract

The elastic scattering of 12C+24Mg has been studied by means of a phase-shift analysis of 21 angular distributions ranging from Elab=16MeV up to Elab=40MeV. A tri-dimensional plot of the reflection coefficient of the S-matrix as a function of the angular momentum and the energy shows a well defined region of energy which separates two regimes: strong absorption for higher energies and the so called "anomalous transparency regime", recently observed in this system at low energies. The Argand diagrams of the S-matrix in angular momentum space also present very contrasting behaviours in the two regions with very rapidly varying phases in the low energy region, which we associate with a parity dependent term in the S-matrix directly related to significant coupling to the elastic transfer of a 12C nucleus.

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R. Lichtenthaeler, A. Lepine-Szily, M. S. Hussein. 1999-07-28. Nuclear transparency and the onset of strong absorption regime in the 12C+24Mg system. https://doi.org/10.1103/physrevc.60.041601

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