| Autor: |
Sommer, F., König, K., Rossi, D. M., Everett, N., Garand, D., de Groote, R. P., Holt, J. D., Imgram, P., Incorvati, A., Kalman, C., Klose, A., Lantis, J., Liu, Y., Miller, A. J., Minamisono, K., Miyagi, T., Nazarewicz, W., Nörtershäuser, W., Pineda, S. V., Powel, R., Reinhard, P. -G., Renth, L., Romero-Romero, E., Roth, R., Schwenk, A., Sumithrarachchi, C., Teigelhöfer, A. |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Phys. Rev. Lett. 129, 132501 (2022) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevLett.129.132501 |
| Popis: |
Nuclear charge radii of $^{55,56}$Ni were measured by collinear laser spectroscopy. The obtained information completes the behavior of the charge radii at the shell closure of the doubly magic nucleus $^{56}$Ni. The trend of charge radii across the shell closures in calcium and nickel is surprisingly similar despite the fact that the $^{56}$Ni core is supposed to be much softer than the $^{48}$Ca core. The very low magnetic moment $\mu(^{55}\mathrm{Ni})=-1.108(20)\,\mu_N$ indicates the impact of M1 excitations between spin-orbit partners across the $N,Z=28$ shell gaps. Our charge-radii results are compared to \textit{ab initio} and nuclear density functional theory calculations, showing good agreement within theoretical uncertainties. |
| Databáze: |
arXiv |
| Externí odkaz: |
|
