Probing the quantum phase transition around $N\approx60$ via mass measurements of technetium isotopes
J. Ruotsalainen, A. Jaries, M. Stryjczyk, A. Kankainen, B. Andel, M. Araszkiewicz, O. Beliuskina, A. Bruce, S. Cannarozzo, S. Chinthakayala, S. Doshi, T. Eronen, A. Fijałkowska, L. M. Fraile, P. Garczyński, Z. Ge, D. Grigorova, G. Jaworski, A. Korgul, T. Krakowski, J. Kurpeta, S. Lalkovski, M. Llanos Expósito, I. D. Moore, L. M. Motilla, M. Mougeot, H. Penttilä, A. Raggio, W. Rattanasakuldilok, J. Saren, K. Solak
公開日: 2025/5/21
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$_{60}$.