Study of nuclear correlation effects via 12C(p,n)12N(g.s.,1+) at 296 MeV

Abstract

We report measurements of the cross section and a complete set of polarization observables for the Gamow--Teller ${}^{12}\mathrm{C}(\vec{p},\vec{n}){}^{12}\mathrm{N}(g.s.,1^{+})$ reaction at a bombarding energy of 296 MeV. The data are compared with distorted wave impulse approximation calculations employing transition form factors normalized to reproduce the observed beta-decay $ft$ value. The cross section is significantly under-predicted by the calculations at momentum transfers $q\gtrsim$ 0.5 $\mathrm{f}{\mathrm{m}}^{-1}$. The discrepancy is partly resolved by considering the non-locality of the nuclear mean field. However, the calculations still under-predict the cross section at large momentum transfers of $q$ $\simeq$ 1.6 $\mathrm{f}{\mathrm{m}}^{-1}$. We also performed calculations employing random phase approximation response functions and found that the observed enhancement can be attributed in part to pionic correlations in nuclei.

arXiv comment5 figures, submitted to Phys. Lett. B

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Cited by in corpus (3)

• Complete set of polarization transfer observables for the ${}^{16}\mathrm{O}(\vec{p},\vec{n}){}^{16}\mathrm{F}$ reaction at 296 MeV and 0 degrees
• Complete set of polarization transfer coefficients for the ${}^3\mathrm{He}(p,n)$ reaction at 346 MeV and 0 degrees
• Polarization transfer measurements for ${}^{12}\mathrm{C}(\vec{p},\vec{n}{)}^{12}\mathrm{N}(g.s.,1^{+})$ at 296 MeV and nuclear correlation effects