Speaker
Description
Nuclear masses are key inputs for r-process calculations. With JYFLTRAP double
Penning trap at the IGISOL facility in the JYFL Accelerator Laboratory, we have recently
determined masses for dozens of neutron-rich nuclei and their isomeric states, see e.g.
[1-6]. With the phase-imaging ion-cyclotron resonance technique, it is possible to
resolve long-lived isomeric states with low excitation energies, leading to better
accuracy for the ground-state masses. The measurements directly improve the
precision of astrophysical reaction-rate calculations for neutron captures but also
serve important testing points for current mass models used for the experimentally
inaccessible r-process nuclei. In this contribution, I will present an overview of our
recent results from JYFLTRAP.
References
[1] A. Jaries et al., Phys. Rev. C 110, 045809 (2024).
[2] A. Jaries et al., Phys. Rev. Lett. 134, 042501 (2025).
[3] M. Hukkanen, W. Ryssens, et al., Phys. Rev. C 107, 014306 (2023).
[4] M. Hukkanen, W. Ryssens et al., Phys. Lett. B 856, 138916 (2024).
[5] J. Ruotsalainen et al., Phys. Rev. C 111, 044314 (2025).
[6] L. Canete et al., Phys. Lett. B 853, 138663 (2024).