Protons and neutrons in the atomic nucleus move shells analogous to electronic shell structures of atoms. The nuclear structure varies as a result changes mean field with number N protons Z, these variations can be probed by measuring mass differences between nuclei. = Z 40 self-conjugate 80Zr is particular interest, its proton neutron are expected very similar, ground state highly deformed. He...

We report on the dataset, data handling, and detailed analysis techniques of first neutrino-mass measurement by Karlsruhe Tritium Neutrino (KATRIN) experiment, which probes absolute scale via β-decay kinematics molecular tritium. The source is highly pure, cryogenic T2 gas. β electrons are guided along magnetic field lines toward a high-resolution, integrating spectrometer for energy analysis. ...

Abstract Measured decay-energy spectra from invariant mass spectroscopy can give insights into the shell structure of particle-unbound systems. However, it is challenging to extract underlying physics a measured spectrum due detector resolution and acceptance effects. In this work, we introduce deblurring method used restore decay energy for three-body 26 O. The utilizes Richardson-Lucy algorit...