Odd-odd neutron-rich rhodium isotopes studied with the double Penning trap JYFLTRAP

TL;DR

This study reports precise mass measurements of neutron-rich rhodium isotopes, including the first measurement of $^{120}$Rh, using advanced Penning trap techniques, and compares results with theoretical models to explore nuclear deformation.

Contribution

First mass measurements of $^{120}$Rh and isomeric states using PI-ICR at JYFLTRAP, enhancing understanding of neutron-rich rhodium isotopes.

Findings

First measurement of $^{120}$Rh mass.

Separation and measurement of isomeric states.

Comparison with BSkG1 model indicating triaxial deformation.

Abstract

Precision mass measurements of neutron-rich rhodium isotopes have been performed at the JYFLTRAP Penning trap mass spectrometer at the Ion Guide Isotope Separator On-Line (IGISOL) facility. We report results on ground- and isomeric-state masses in $^{110,112,114,116,118}$Rh and the very first mass measurement of $^{120}$Rh. The isomeric states were separated and measured for the first time using the phase-imaging ion-cyclotron-resonance (PI-ICR) technique. For $^{112}$Rh, we also report new half-lives for both the ground state and the isomer. The results are compared to theoretical predictions using the BSkG1 mass model and discussed in terms of triaxial deformation.