Precision mass measurements of ${}^{125-127}$Cd isotopes and isomers approaching the $N=82$ closed shell

Abstract

We present the results of precision mass measurements of neutron-rich cadmium isotopes. These nuclei approach the $N=82$ closed neutron shell and are important to nuclear structure as they lie near doubly-magic ${}^{132}$Sn on the chart of nuclides. Of particular note is the clear identification of the ground state mass in ${}^{127}$Cd along with the isomeric state. We show that the ground state identified in a previous mass measurement which dominates the mass value in the Atomic Mass Evaluation is an isomeric state. In addition to ${}^{127/m}$Cd, we present other cadmium masses measured (${}^{125/m}$Cd and ${}^{126}$Cd) in a recent TITAN experiment at TRIUMF. Finally, we compare our measurements to new \emph{ab initio} shell-model calculations and comment on the state of the field in the $N=82$ region.

arXiv comment8 Pages with citations, 3 Figures, 2 Tables

References in corpus (22)

• Nuclear ground-state masses and deformations: FRDM(2012)
• Improved nuclear matter calculations from chiral low-momentum interactions
• Similarity Renormalization Group for Nucleon-Nucleon Interactions
• A nucleus-dependent valence-space approach to nuclear structure
• Precision Atomic Physics Techniques for Nuclear Physics with Radioactive Beams
• Nonperturbative shell-model interactions from the in-medium similarity renormalization group
• Saturation with chiral interactions and consequences for finite nuclei
• Ab Initio Path to Heavy Nuclei
• In-Medium Similarity Renormalization Group for Open-Shell Nuclei
• Ground and excited states of doubly open-shell nuclei from ab initio valence-space Hamiltonians
• Exploring sd-shell nuclei from two- and three-nucleon interactions with realistic saturation properties
• Spins, Electromagnetic Moments, and Isomers of 107-129Cd
• TITAN's Digital RFQ Ion Beam Cooler and Buncher, Operation and Performance
• Evolved Chiral NN+3N Hamiltonians for Ab Initio Nuclear Structure Calculations
• Precision Mass Measurements beyond ${}^{132}$Sn: Anomalous behaviour of odd-even staggering of binding energies
• Precision Mass Measurements of 129-131Cd and Their Impact on Stellar Nucleosynthesis via the Rapid Neutron Capture Process
• First Use of High Charge States for Mass Measurements of Short-lived Nuclides in a Penning Trap
• Isomeric states close to doubly magic ${}^{132}$Sn studied with JYFLTRAP
• A large Bradbury Nielsen ion gate with flexible wire spacing based on photo-etched stainless steel grids and its characterization applying symmetric and asymmetric potentials
• Breakdown of the Isobaric Multiplet Mass Equation for the A = 20 and 21 Multiplets
• The Nuclear Pairing Gap -- How Low Can It Go?
• Mass measurements of neutron-rich Rb and Sr isotopes

Cited by in corpus (13)

• Current Status of r-Process Nucleosynthesis
• r-Process Nucleosynthesis: Connecting Rare-Isotope Beam Facilities with the Cosmos
• Converged ab initio calculations of heavy nuclei
• First glimpse of the $N=82$ shell closure below $Z=50$ from masses of neutron-rich cadmium isotopes and isomers
• Nucleosynthesis and observation of the heaviest elements
• Propagation of Statistical Uncertainties of Skyrme Mass Models to Simulations of $r$-Process Nucleosynthesis
• Following nuclei through nucleosynthesis: a novel tracing technique
• Evolution of nuclear structure in and around Z=50 closed shell: Generalized Seniority in Cd, Sn and Te isotopes
• High-precision Penning-trap mass measurements of Cd and In isotopes at JYFLTRAP remove the fluctuations in the two-neutron separation energies
• High-precision $Q_{EC}$-value measurement of the superallowed ${\beta }^{+}$ emitter ${}^{22}$Mg and an evaluation of the $A=22$ isobaric triplet
• $\beta$ Decay of ${}^{132}$In and Spectroscopy of ${}^{132}$Sn and ${}^{131}$Sb with the GRIFFIN Spectrometer
• Nuclear Mass Measurements With Radioactive Ion Beams
• Systematic shell-model study of ${}^{98-130}$Cd isotopes and $8^{+}$ isomeric states