Nuclear Masses in Astrophysics for the Next 25 Years

Atomic masses are indispensable in nuclear structure and astrophysics research, and Penning traps enable the most precise mass measurements achievable to date [1]. TRIGA-Trap is a high-precision, double Penning-trap mass spectrometer located in the reactor hall of the TRIGA (Training, Research, Isotopes, General Atomic) research reactor in Mainz, Germany [2]. At TRIGA-Trap, mass measurements...

A neural network with two hidden layers is developed for nuclear mass prediction, based on the finite-range droplet model (FRDM12). Different hyperparameters, including the number of hidden units, the choice of activation functions, the initializers, and the learning rates, are adjusted explicitly and systematically.
The resulting mass predictions are achieved by averaging the predictions...

The established storage ring mass spectrometry at the current operational HIRFL-CSR facility in Lanzhou has demonstrated its efficacy in accurately measuring the masses of short-lived nuclei that are far from beta stability. With the advent of the High Intensity heavy-ion Accelerator Facility (HIAF), the beam intensity is anticipated to be three orders of magnitude higher than what can...

Approximately half of the nuclei heavier than iron are produced by the rapid neutron capture process ($r$ process). [1] The r process can be simulated with nuclear reaction network codes for which nuclear input data is essential. Particularly neutron capture reaction rates and
$\beta$-decay Q values are important, both of which are dependent on nuclear masses. However, many neutron-rich...

More details to my talk "Schottky & Isochronous Mass Spectroscopy"

The time-of-flight magnetic rigidity (TOF-B$\rho$) technique is an effective method for determining the mass of unstable nuclides that have lifetimes of the order of 10s of ms. This method uses the motion of an ion in a magnetic field to determine its mass. With sufficiently precise time-of-flight measurements, around 10 ps uncertainty, the resulting mass resolution is of the order of...

In this poster, I will present the work that revolves around nuclear mass measurements methods of exotic nuclei with the ISOLTRAP experiment at CERN. You will find the astrophysical motivations for mass measurements in two extremes of the nuclear chart near the magic proton number Z = 50. To reach these areas, there are some technical challenges that we have to face. In this context, I will...

Time-of-flight mass measurement of exotic nuclei near N=28 shell closure around sulfur