Kromer Kathrin, Lyu Chunhai, Door Menno, Filianin Pavel, Harman Zoltán, Herkenhoff Jost, Huang Wenjia, Keitel Christoph H, Lange Daniel, Novikov Yuri N, Schweiger Christoph, Eliseev Sergey, Blaum Klaus
Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany.
Advanced Energy Science and Technology Guangdong Laboratory, Huizhou, 516007 China.
Eur Phys J A Hadron Nucl. 2022;58(10):202. doi: 10.1140/epja/s10050-022-00860-1. Epub 2022 Oct 25.
The absolute atomic mass of Pb has been determined with a fractional uncertainty of by measuring the cyclotron-frequency ratio of Pb to Xe with the high-precision Penning-trap mass spectrometer Pentatrap and computing the binding energies and of the missing 41 and 26 atomic electrons, respectively, with the fully relativistic multi-configuration Dirac-Hartree-Fock (MCDHF) method. has been measured with a relative precision of . and have been computed with an uncertainty of 9.1 eV and 2.1 eV, respectively, yielding u ( eV/c ) for the Pb neutral atomic mass. This result agrees within with that from the (AME) 2020, while improving the precision by almost two orders of magnitude. The new mass value directly improves the mass precision of 14 nuclides in the region of = 81-84 and is the most precise mass value with . Thus, the measurement establishes a new region of reference mass values which can be used e.g. for precision mass determination of transuranium nuclides, including the superheavies.
通过使用高精度潘宁阱质谱仪Pentatrap测量铅（Pb）与氙（Xe）的回旋频率比，并分别用全相对论多组态狄拉克 - 哈特里 - 福克（MCDHF）方法计算缺失的41个和26个原子电子的结合能，已确定了Pb的绝对原子质量，其分数不确定度为 。 已以 的相对精度进行了测量。 和 分别以9.1电子伏特和2.1电子伏特的不确定度进行了计算，得出Pb中性原子质量为 原子质量单位（ 电子伏特/ ）。该结果与2020年《原子量评估》（AME）的结果在 范围内一致，同时精度提高了近两个数量级。新的质量值直接提高了原子序数 = 81 - 84区域内14种核素的质量精度，并且是 时最精确的质量值。因此，该测量建立了一个新的参考质量值区域，可用于例如超铀核素（包括超重核素）的精确质量测定。
