First experimental test of the ratio method
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Abstract
The ratio is a new reaction observable suggested to extract accurately structure information on halo nuclei. It corresponds to the ratio of differential cross sections for scattering and breakup, which is predicted to remove the uncertainty related to the reaction dynamics. We present here the first experimental test of the method for the 11Be + 12C collision at MeV performed at 𝐸Lab = 20𝐴 MeV Texas A&M University. Differential cross sections for scattering and inclusive one-neutron breakup have been measured with the new detector array BlueSTEAl. The ratio of cross sections is very smooth and independent of the projectile-target interaction, which demonstrates the validity of the ratio method. We extend our analysis to existing 11Be + 208Pb data, confirming that the method works well on any target.
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Nuclear instruments & methods in physics research : Section A, 1060, Elsevier, Amsterdam, 2025, https://doi.org/10.1016/j.nuclphysa.2025.123120