Atomic mass determination of uranium-238
| Autor: | Kromer, Kathrin, Lyu, Chunhai, Bieroń, Jacek, Door, Menno, Enzmann, Lucia, Filianin, Pavel, Gaigalas, Gediminas, Harman, Zoltán, Herkenhoff, Jost, Huang, Wenjia, Keitel, Christoph H., Eliseev, Sergey, Blaum, Klaus |
|---|---|
| Rok vydání: | 2023 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | The atomic mass of uranium-238 has been determined to be $238.050\,787\,618(15)\,\text{u}$, improving the literature uncertainty by two orders of magnitude. It is obtained from a measurement of the mass ratio of $^{238}$U$^{47+}$ and $^{132}$Xe$^{26+}$ ions with an uncertainty of $3.5\times 10^{-12}$. The measurement was carried out with the Penning-trap mass spectrometer \textsc{Pentatrap} and was accompanied by a calculation of the binding energies $E_{\text{U}}$ and $E_{\text{Xe}}$ of the 47 and 26 missing electrons of the two highly charged ions, respectively. These binding energies were determined using an \textit{ab initio} multiconfiguration Dirac-Hartree-Fock (MCDHF) method to be $E_{\text{U}} = 39\,927(10)\,\text{eV}$ and $E_{\text{Xe}} = 8\,971.2(21)\,\text{eV}$. The new mass value will serve as a reference for high-precision mass measurements in the heavy mass region of the nuclear chart up to transuranium nuclides. Comment: Includes a Supplemental Material |
| Databáze: | arXiv |
| Externí odkaz: |
|