Charge-exchange scattering to the isobaric analog state at medium energies as a probe of the neutron skin

Abstract

The charge-exchange (3He,t) scattering to the isobaric analog state (IAS) of the target can be considered as "elastic" scattering of 3He by the isovector term of the optical potential (OP) that flips the projectile isospin. Therefore, the accurately measured charge-exchange scattering cross- section for the IAS can be a good probe of the isospin dependence of the OP, which is determined exclusively within the folding model by the difference between the neutron and proton densities and isospin dependence of the nucleon-nucleon interaction. Given the neutron skin of the target is related directly to the same density difference, it can be well probed in the analysis of the charge- exchange (3He,t) reactions at medium energies when the two-step processes can be neglected and the t-matrix interaction can be used in the folding calculation. For this purpose, the data of the (3He,t) scattering to the IAS of 90Zr and 208Pb targets at Elab = 420 MeV have been analyzed in the distorted wave Born approximation using the double-folded charge-exchange form factor. The neutron skin deduced for these two nuclei turned out to be in a good agreement with the existing database.

Accepted for publication in Physical Review C

References in corpus (4)

• On the extraction of weak transition strengths via the (3He,t) reaction at 420 MeV
• Folding model study of the isobaric analog excitation: isovector density dependence, Lane potential and nuclear symmetry energy
• Neutron Skin Thickness of 90Zr Determined By Charge Exchange Reactions
• Gamow-Teller Unit Cross Sections for (t,3He) and (3He,t) Reactions

Cited by in corpus (10)

• Symmetry Energy III: Isovector Skins
• A dispersive optical model analysis of ${}^{208}$Pb generating a neutron-skin prediction beyond the mean field
• Constraints on the Neutron Skin and the Symmetry Energy from the Anti-analog Giant Dipole Resonance in 208Pb
• Influence of multiphonon excitations and transfer on the fusion of Ca+Zr
• Rearrangement term in the nonlocal folding model of the nucleon optical potential
• Single Charge-Exchange Reactions and the Neutron Density at the Surface of the Nucleus
• Prediction of (p,n) Charge-Exchange Reactions with Uncertainty Quantification
• Study of ($p,n$)IAS and (${}^3$He,$t$)IAS charge-exchange reactions with the $G$-matrix folding method
• Exploring sensitivity of charge-exchange ($p,n$) reactions to the neutron density distribution
• Neutron skin impurity from Coulomb core polarization in ${}^{208}\text{Pb}$: Insights from PREX-II and validation via the ${(}^3\text{He},t)$ isobaric analog state reaction