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Toward a reliable description of ($$p$$,$$pN$$) reactions in the distorted-wave impulse approximation

Phuc, N. T. T.*; Yoshida, Kazuki  ; Ogata, Kazuyuki*

Our goal is to investigate the effects of various corrections and uncertainties within the standard distorted-wave impulse approximation (DIWA) formalism on the ($$p$$,$$pN$$) cross sections. We analyze the ($$p$$,$$2p$$) and ($$p$$,$$pn$$) reactions data measured at the R3B/LAND setup at GSI for carbon, nitrogen and oxygen isotopes in the incident energy range of 300-450 MeV/u. Cross sections and reduction factors are calculated by the DWIA method. We have found that including the nonlocality corrections and M$$o$$ller factor affects the cross sections considerably. The proton-neutron asymmetry dependence of reduction factors extracted by the DWIA calculation is very weak and consistent with those given by other reaction methods and ab initio structure calculations. They also suggest that some higher-order effects, which is essential for an accurate cross section description at large recoil momentum, is missing in the current DWIA and other reaction models.



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Category:Physics, Nuclear



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