Matter radii and skins of ^6,8He from reaction cross section of proton+^6,8He scattering based on the Love-Franey t-matrix model (published in Results in Physics)

2022/02/09 by Wakasa, Tomotsugu, Takechi, Maya, Tagami, Shingo +1
#FOS: Physical sciences #Nuclear Theory (nucl-th)

paper · doi:10.48550/arxiv.2202.04229

Abstract

For ^4,6,8He, Tanihata et al. determined matter radii r_m(σ_{\rm I})=1.57(4), 2.48(3), 2.52(3)~fm from interaction cross sections σ_{\rm I} for ^4,6,8He scattering on Be, C Al targets at 790~MeV/nucleon. Lu et al. measured the atomic isotope shifts (AIS) for ^4,6,8He and determined proton radii r_p(\rm AIS) for ^4,6,8He. As for p+^4,6,8He scattering, reaction cross sections σ_{\rm R}(\rm exp) are available at 700~MeV with high accuracy. Our aim is to determine matter radii r_m and skins r_{\rm skin} for ^6,8He from the σ_{\rm R}(\rm exp) and the r_p(\rm AIS). \bf Method: Our model is the Love-Franey t-matrix folding model, since the model is better than the optical limit of Glauber model. Our results for ^6,8He are r_m(\rm exp)=2.48(3), 2.53(2)~fm and r_{\rm skin}=0.78(3), 0.82(2)~fm. For ^6,8He, our results r_m(σ_{\rm R}) agree with those of Tanihata \it et al.. For ⁸He, the distance between ⁴He and the center of mass of valence four neutrons is 2.367~fm.

Related

• Folding-model approach to reaction cross section of ^4,6,8He+¹²C scattering at 790 MeV (published in Results in Physics)
• Skin values and matter radii of ²⁰⁸Pb and ^58,60,64Ni based on reaction cross section of ^3,4He scattering (published in Results in Physics)
• Skin values of ²⁰⁸Pb and ⁴⁸Ca determined from reaction cross sections (published in Results in Physics)
• Microscopic calculation of proton and alpha-particle inelastic scattering to study the excited states of ⁶He and ⁸He
• Neutron skin thickness of ²⁰⁸Pb determined from reaction cross section for proton scattering