Background: For 4,6,8He, Tanihata et al. determined matter radii rm(σI)=1.57(4),2.48(3),2.52(3) fm from interaction cross sections σI 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 rp(AIS) for 4,6,8He. As for p+4,6,8He scattering, reaction cross sections σR(exp) are available at 700 MeV with high accuracy. Aim: Our aim is to determine matter radii rm and skins rskin for 6,8He from the σR(exp) and the rp(AIS). Method: Our model is the Love–Franey t-matrix folding model, since the model is better than the optical limit of Glauber model. Results: Our results for 6,8He are rm(exp)=2.48(3),2.53(2) fm and rskin=0.78(3), 0.82(2) fm. Conclusion: For 6,8He, our results rm(σR) agree with those of Tanihata et al. For 8He, the distance between 4He and the center of mass of valence four neutrons is 2.367 fm.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)