Probing the quantum phase transition around $N\approx 60$ via mass measurements of technetium isotopes

Abstract

The masses of neutron-rich ${}^{104-106}$Tc isotopes were measured using the JYFLTRAP double Penning trap and found to deviate from the Atomic Mass Evaluation 2020 by $-79(25)$, $40(12)$ and $94(41)$ keV, respectively. In the case of ${}^{105,106}$Tc, the updated $Q_{\beta }$ values are in agreement with a previous JYFLTRAP measurement, disagreeing with the values from the mass evaluation. The new mass values result in a more linear trend in two-neutron separation energies indicating that technetium ($Z=43$) isotopes around $N\approx 60$ are not a part of the island of shape coexistence around ${}^{100}$Zr${}_{60}$.

8 pages, 4 figures

References in corpus (13)

• A sextupole ion beam guide to improve the efficiency and beam quality at IGISOL
• Mass measurements in the vicinity of the rp-process and the nu p-process paths with JYFLTRAP and SHIPTRAP
• Mass measurements of very neutron-deficient Mo and Tc isotopes and their impact on rp process nucleosynthesis
• Odd-odd neutron-rich rhodium isotopes studied with the double Penning trap JYFLTRAP
• Improving Fission-product Decay Data for Reactor Applications: Part I -- Decay Heat
• Direct measurement of the mass difference of ${}^{72}$As-${}^{72}$Ge rules out ${}^{72}$As as a promising $\beta$-decay candidate to determine the neutrino mass
• Precise Q value measurements of ${}^{112,113}$Ag and ${}^{115}$Cd with the Canadian Penning trap for evaluation of potential ultra-low Q value $\beta$-decays
• High-precision Penning-trap mass measurements of Cd and In isotopes at JYFLTRAP remove the fluctuations in the two-neutron separation energies
• ${\beta }^{-}$ decay $Q$-value measurement of ${}^{136}$Cs and its implications to neutrino studies
• Isomeric states of fission fragments explored via Penning trap mass spectrometry at IGISOL
• High-precision measurements of the atomic mass and electron-capture decay $Q$ value of ${}^{95}$Tc
• Mass measurements in the ${}^{132}$Sn region with the JYFLTRAP double Penning trap mass spectrometer
• Reinvestigation of ${}^{91}$Sr and ${}^{95}$Y atomic masses using the JYFLTRAP Penning trap