학술논문
Mass measurements of $^{60-63}$Ga reduce x-ray burst model uncertainties and extend the evaluated $T=1$ isobaric multiplet mass equation
Document Type
Working Paper
Author
Paul, S. F.; Bergmann, J.; Cardona, J. D.; Dietrich, K. A.; Dunling, E.; Hockenbery, Z.; Hornung, C.; Izzo, C.; Jacobs, A.; Javaji, A.; Kootte, B.; Lan, Y.; Leistenschneider, E.; Lykiardopoulou, E. M.; Mukul, I.; Murböck, T.; Porter, W. S.; Silwal, R.; Smith, M. B.; Ringuette, J.; Brunner, T.; Dickel, T.; Dillmann, I.; Gwinner, G.; MacCormick, M.; Reiter, M. P.; Schatz, H.; Smirnova, N. A.; Dilling, J.; Kwiatkowski, A. A.
Source
Phys. Rev. C 104, 065803 (2021)
Subject
Language
Abstract
We report precision mass measurements of neutron-deficient gallium isotopes approaching the proton drip line. The measurements of $^{60-63}$Ga performed with the TITAN multiple-reflection time-of-flight mass spectrometer provide a more than threefold improvement over the current literature mass uncertainty of $^{61}$Ga and mark the first direct mass measurement of $^{60}$Ga. The improved precision of the $^{61}$Ga mass has important implications for the astrophysical rp process, as it constrains essential reaction Q-values near the $^{60}$Zn waiting point. Based on calculations with a one-zone model, we demonstrate the impact of the improved mass data on prediction uncertainties of X-ray burst models. The first-time measurement of the $^{60}$Ga ground-state mass establishes the proton-bound nature of this nuclide; thus, constraining the location of the proton drip line along this isotopic chain. Including the measured mass of $^{60}$Ga further enables us to extend the evaluated $T=1$ isobaric multiplet mass equation up to $A=60$.
Comment: 16 pages, 6 figures
Comment: 16 pages, 6 figures