[Background] Very lately, the CREX group presents a skin value ΔRskin48​(CREX)=0.121±0.026 (exp)±0.024 (model)=0.071∼0.171~fm. Meanwhile, the PREX group reported a skin value
ΔRskin208​(PREX2)=0.283±0.071=0.212∼0.354~fm.
In our previous paper, we determined both the L--ΔRskin48​
relation and the L--ΔRskin208​ one, using 206 EoSs, where
L is a slope parameter. [Purpose] We determine L from ΔRskin48​(CREX) and ΔRskin208​(PREX2), using
207 EoSs. [Results] The ΔRskin48​(CREX) yields L(CREX)=0∼51~MeV and the ΔRskin208​(PREX2) does
L(PREX2)=76∼165~MeV. [Conclusion] There is no overlap between
L(CREX) and L(PREX2). This is a big problem to be solved
In our previous work, we determined matter radii rm​(exp) and
neutron-skin thickness rskin​(exp) from reaction cross sections
σR​(exp) of proton scattering on 208Pb, 58Ni,
40,48Ca, 12C targets, using the chiral (Kyushu) g-matrix folding
model with the densities calculated with Gogny-D1S-HFB (D1S-GHFB) with angular
momentum projection (AMP). The resultant rskin​(exp) agree with
the PREX2 and CREX values. As for 58Ni, our value is consistent with one
determined from the differential cross section for 58Ni+4He
scattering. As for p+60,62,64N scattering, σR​(exp) are
available as a function of incident energies Ein​, where Ein​=22.8∼65.5~MeV for 60Ni, Ein​=40,60.8~MeV for 62Ni,
Ein​=40,60.8~MeV for 64Ni. Our aim is to determine matter radii
rm​(exp) for 60,62,64Ni from the σR​(exp). Our method is the Kyushu g-matrix folding model with the densities
scaled from D1S-GHFB+AMP densities, Our skin values are rskin​(exp)=0.076±0.019, 0.106±0.192, 0.162±0.176~fm, and rm​(exp)=3.759±0.011, 3.811±0.107, 3.864±0.101~fm for
60,62,64Ni, respectively
In our previous paper, we tested the chiral (Kyushu) folding model for
12C+12C scattering, since the profile function in the Glauber mode is
constructed for the system. We found that the folding model is reliable for
reaction cross sections σR​ in 30 \lsim E_{\rm lab} \lsim 100
~MeV and 250 \lsim E_{\rm lab} \lsim 400 ~MeV. Accurate data are available
for 12C scattering on 9Be, 12C, 27Al targets in 30 \lsim
E_{\rm lab} \lsim 400 ~MeV. We determine matter radius rm​(exp) of
12C from the accurate σR​(exp), using the Kyushu
g-matrix folding model. Our result is rm12​(exp)=2.352±0.013~fm for 12C. The model is applied for the accurate data on
12C+27Al scattering, and yields rm​(exp)=2.936±0.012~fm for 27Al. Our conclusion is that rm​(exp)=2.352±0.013~fm agrees with rm​(exp)=2.35±0.02~fm determined
from interaction cross sections by Tanihata {\it et. al.}.Comment: arXiv admin note: text overlap with arXiv:2306.0960
The cross sections of SDR in the Sb isotopes have been measured. Within the
model used, the neutron-skin thicknesses rskin​(exp) deduced
0.12±0.06fm for 116Sn, 0.13±0.06fm for 118Sn, 0.18±0.07fm for 120Sn, 0.22±0.07fm for 122Sn, 0.19±0.07fm for
124Sn. We tested the chiral (Kyushu) g-matrix folding model for
12C+12C scattering, and found that the Kyushu g-matrix folding
model is reliable for reaction cross sections σR​ in 30<Ein​<100MeV and 250<Ein​<400MeV. We determine neutron skin
thickness rskin​(exp), using measured σR​ of
4He+116,120,224Sn scattering. The results are rskin​(exp)=0.242±0.140fm for 116Sn, rskin​(exp)=0.377±0.140fm for 120Sn, rskin​(exp)=0.180±0.142fm for
124Sn. The σR​ are available for proton scattering on
116,118,120,122,124Sn with high accuracy. Our aim is to determine rskin​(exp) for 116,118,120,122,124Sn with small errors by using the
Kyushu g-matrix folding model. Our model is the folding model with the
densities scaled from the D1S-GHFB+AMP neutron density. The proton radii of
D1S-GHFB+AMP agree with those calculated with the isotope shift method based on
the electron scattering. We then scale the neutron densities so as to reproduce
the σR​(exp). In 30<Ein​<65MeV, we determine
rskin​(exp) from measured σR​. The values are
rskin​(exp)=0.118±0.021~fm for 116Sn, 0.112±0.021fm for 118Sn, 0.124±0.021fm for 120Sn, 0.156±0.022fm for 124Sn. As for 122Sn, the skin value in 30<Ein​<50MeV is 0.122±0.024fm. Our results are consistent with the previous
values.Comment: arXiv admin note: text overlap with arXiv:2211.1668