Penning-trap mass measurement of $^{173}$Hf

A. Jaries, M. Stryjczyk, A. Kankainen, T. Eronen, Z. Ge, M. Hukkanen, I. D. Moore, M. Mougeot, A. Raggio, W. Rattanasakuldilok, J. Ruotsalainen
Nuclear Experiment, Nuclear Experiment (nucl-ex)
European Physical Journal A 59, 263 (2023)
2023-08-15 16:00:00
We report on the precise mass measurement of the $^{173}$Hf isotope performed at the Ion Guide Isotope Separator On-Line facility using the JYFLTRAP double Penning trap mass spectrometer. The new mass-excess value, ${\mathrm{ME} = -55390.8(30)}$~keV, is in agreement with the literature while being nine times more precise. The newly determined $^{173}$Hf electron-capture $Q$ value, $Q_{EC} = 1490.2(34)$~keV, allows us to firmly reject the population of an excited state at 1578 keV in $^{173}$Lu and 11 transitions tentatively assigned to the decay of $^{173}$Hf. Our refined mass value of $^{173}$Hf reduces mass-related uncertainties in the reaction rate of $^{174}$Hf$(\gamma,n)^{173}$Hf. Thus, the rate for the main photodisintegration destruction channel of the $p$ nuclide $^{174}$Hf in the relevant temperature region for the $\gamma$ process is better constrained.
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