$\text{Direct}~Q\text{-Value Determination of the}~β^-~\text{Decay of} ~^{187}\text{Re}$
$\text{Direct}~Q\text{-Value Determination of the}~β^-~\text{Decay of} ~^{187}\text{Re}$
摘要：
用潘宁阱质谱仪PENTATRAP测量$^{187}\mathrm{Os}^{29+}$与$^{187}\mathrm{Re}^{29+}$离子的回旋频率比。$R=1.000\:000\:013\:882(5)$的结果是迄今为止对离子进行的最精确的测量。此外，通过相对论多组态方法计算了Re和Os中29个丢失电子的总结合能差，得到了$ΔE = 53.5(10)$ eV的值。最后，使用所获得的结果，中性$^{187}$ Re和$^{187}$ Os之间的质量差，即，测定$^{187}$ Re的$β^-$衰变的$Q$值为2470.9（13）eV。
英文摘要：
The cyclotron frequency ratio of $^{187}\mathrm{Os}^{29+}$ to $^{187}\mathrm{Re}^{29+}$ ions was measured with the Penning-trap mass spectrometer PENTATRAP. The achieved result of $R=1.000\:000\:013\:882(5)$ is to date the most precise such measurement performed on ions. Furthermore, the total binding-energy difference of the 29 missing electrons in Re and Os was calculated by relativistic multiconfiguration methods, yielding the value of $ΔE = 53.5(10)$ eV. Finally, using the achieved results, the mass difference between neutral $^{187}$Re and $^{187}$Os, i.e., the $Q$ value of the $β^-$ decay of $^{187}$Re, is determined to be 2470.9(13) eV.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
