Toward precision mass measurements of neutron-rich nuclei relevant to $r$-process nucleosynthesis

Abstract

The open question of where, when, and how the heavy elements beyond iron enrich our Universe has triggered a new era in nuclear physics studies.\ Of all the relevant nuclear physics inputs, the mass of very neutron-rich nuclides is a key quantity for revealing the origin of heavy elements beyond iron.\ Although the precise determination of this property is a great challenge, enormous progress has been made in recent decades, and it has contributed significantly to both nuclear structure and astrophysical nucleosynthesis studies.\ In this review, we first survey our present knowledge of the nuclear mass surface, emphasizing the importance of nuclear mass precision in $r$-process calculations.\ We then discuss recent progress in various methods of nuclear mass measurement with a few selected examples.\ For each method, we focus on recent breakthroughs and discuss possible ways of improving the weighing of $r$-process nuclides.

10 figures, review articles in Frontiers of Physics

References in corpus (20)

• Relativistic Continuum Hartree Bogoliubov Theory for Ground State Properties of Exotic Nuclei
• The r-process of stellar nucleosynthesis: Astrophysics and nuclear physics achievements and mysteries
• Surface diffuseness correction in global mass formula
• First Penning-trap mass measurement in the millisecond half-life range: the exotic halo nucleus 11Li
• Evolution of the N=50 shell gap energy towards ${}^{78}$Ni
• Direct mass measurements of 19B, 22C, 29F, 31Ne, 34Na and other light exotic nuclei
• Separated Oscillatory Fields for High-Precision Penning Trap Mass Spectrometry
• New precision mass measurements of neutron-rich calcium and potassium isotopes and three-nucleon forces
• Nuclear Physics Experiments with Ion Storage Rings
• Single-reference high-precision mass measurement with a multi-reflection time-of-flight mass spectrograph
• Global dynamical correlation energies in covariant density functional theory: cranking approximation
• Radial basis function approach in nuclear mass predictions
• Crucial test for covariant density functional theory with new and accurate mass measurements from Sn to Pa
• High-resolution measurement of the time-modulated orbital electron capture and of the ${\beta }^{+}$ decay of hydrogen-like ${}^{142}$Pm${}^{60+}$ ions
• Isospin Dependence in the Odd-Even Staggering of Nuclear Binding Energies
• Reexamining the temperature and neutron density conditions for r-process nucleosynthesis with augmented nuclear mass models
• Mass Measurements and Implications for the Energy of the High-Spin Isomer in 94Ag
• Mass Measurements Demonstrate a Strong N =28 Shell Gap in Argon
• Direct observation of long-lived isomers in ${}^{212}$Bi
• Mass predictions of superheavy nuclei from the systematics of $\alpha$-Decay Energies

Cited by in corpus (13)

• Nuclear mass predictions based on Bayesian neural network approach with pairing and shell effects
• Current Status of r-Process Nucleosynthesis
• Predictions of nuclear $\beta$-decay half-lives with machine learning and their impacts on $r$ process
• Storage ring mass spectrometry for nuclear structure and astrophysics research
• High precision nuclear mass predictions towards a hundred kilo-electron-volt accuracy
• Towards the full realization of the RIBLL2 beam line at the HIRFL-CSR complex
• Reverse engineering nuclear properties from rare earth abundances in the $r$ process
• Development of a fast plastic scintillation detector with time resolution of less than 10 ps
• Plastic scintillation detectors for precision time-of-flight measurements of relativistic heavy ions
• Nuclear mass predictions based on convolutional neural network
• Correlating charge radius with quadrupole deformation and $B(E2)$ in atomic nuclei
• Nuclear Mass Measurements With Radioactive Ion Beams
• Influence of binding energies of electrons on nuclear mass predictions