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Proton-induced deuteron knockout reaction as a probe of an isoscalar proton-neutron pair in nuclei

Chazono, Yoshiki*; Yoshida, Kenichi*; Yoshida, Kazuki  ; Ogata, Kazuyuki*

The isoscalar $$pn$$ pair is expected to emerge in nuclei. We aim to clarify the correspondence between the $$pn$$ pairing strength in many-body calculation and the cross section of proton-induced deuteron knockout ($$p$$, $$pd$$) reaction on $$^{16}$$O. The radial wave function of the isoscalar $$pn$$ pair with respect to the center of $$^{16}$$O is calculated with the energy density functional (EDF) approach and is implemented in the distorted wave impulse approximation framework. The $$pn$$ pairing strength $$V_0$$ in the EDF calculation is varied and the corresponding change in the cross section is investigated. A clear $$V_0$$ dependence of the cross section is found. The nuclear distortion is found to make the $$V_0$$ dependence stronger. Because of the clear $$V_0$$-coross section correspondence, the ($$p$$, $$pd$$) reaction will be a promising probe for the isoscalar $$pn$$ pair in nuclei. For quantitative discussion, further modification of the description of the reaction process will be necessary.

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Category:Physics, Nuclear

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