Charge Radius of Neutron-deficient $^{54}$Ni and Symmetry Energy Constraints Using the Difference in Mirror Pair Charge Radii
| Autor: | Pineda, Skyy V., König, Kristian, Rossi, Dominic M., Brown, B. Alex, Incorvati, Anthony, Lantis, Jeremy, Minamisono, Kei, Nörtershäuser, Wilfried, Piekarewicz, Jorge, Powel, Robert, Sommer, Felix |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Phys.Rev.Lett. 127, 182503 (2021) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.127.182503 |
| Popis: | The nuclear root-mean-square charge radius of $^{54}$Ni was determined with collinear laser spectroscopy to be $R(^{54}$Ni) = 3.737\,(3)~fm. In conjunction with the known radius of the mirror nucleus $^{54}$Fe, the difference of the charge radii was extracted as $\Delta R_{\rm ch}$ = 0.049\,(4)~fm. Based on the correlation between $\Delta R_{\rm ch}$ and the slope of the symmetry energy at nuclear saturation density ($L$), we deduced $20 \le L \le 70$\,MeV. The present result is consistent with the $L$ from the binary neutron star merger GW170817, favoring a soft neutron matter EOS, and barely consistent with the PREX-2 result within 1$\sigma$ error bands. Our result indicates the neutron-skin thickness of $^{48}$Ca as 0.15\,-\,0.19\,fm. Comment: 6 total pages, 3 figures |
| Databáze: | arXiv |
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