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Charge Pickup Reaction Cross Section for Neutron-Rich p-Shell Isotopes at 900A MeV

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arxiv 2506.11392 v1 pith:GR7QQZUN submitted 2025-06-13 nucl-ex nucl-th

classification nucl-exnucl-th
keywords crosschargepickupsectionsasymmetryisospinisotopesreaction
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We report charge pickup reaction cross sections for 24 \textit{p}-shell isotopes, including $^{8,9}$Li, $^{10-12}$Be, $^{10,13-15}$B, $^{12,14-19}$C and $^{14,15,17-22}$N, measured at relativistic energies (approximately 900$A$ MeV) on both hydrogen and carbon targets. For the first time, we reveal a universal rapid increase in the charge pickup cross sections of unstable projectiles with isospin asymmetry along several isotopic chains. The cross sections can be decoupled into distinct contributions from the mass number and isospin asymmetry of the projectile, highlighting the critical role of the latter, and can be formulated empirically.

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