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arXiv · 2108.07039

$\text{Direct}~Q\text{-Value Determination of the}~\beta^-~\text{Decay of} ~^{187}\text{Re}$

P. Filianin·C. Lyu·M. Door·K. Blaum·W. J. Huang·M. Haverkort·P. Indelicato·C. H. Keitel·K. Kromer·D. Lange·Y. N. Novikov·A. Rischka·R. X. Schüssler·Ch. Schweiger·S. Sturm·S. Ulmer·Z. Harman·S. Eliseev
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Abstract

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 $\Delta E = 53.5(10)$ eV. Finally, using the achieved results, the mass difference between neutral $^{187}$Re and $^{187}$Os, i.e., the $Q$ value of the $\beta^-$ decay of $^{187}$Re, is determined to be 2470.9(13) eV.

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P. Filianin, C. Lyu, M. Door, K. Blaum, W. J. Huang, M. Haverkort, P. Indelicato, C. H. Keitel, K. Kromer, D. Lange, Y. N. Novikov, A. Rischka, R. X. Schüssler, Ch. Schweiger, S. Sturm, S. Ulmer, Z. Harman, S. Eliseev. 2021-08-16. $\text{Direct}~Q\text{-Value Determination of the}~\beta^-~\text{Decay of} ~^{187}\text{Re}$. https://doi.org/10.1103/physrevlett.127.072502

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