Speaker
Description
This dissertation award talk will describe the transition of the ISOLTRAP mass spectrometer at CERN from the well-established Penning-trap mass spectrometry (PTMS) technique, ToF-ICR, to the next-generation PTMS technique, called PI-ICR [PRL 110 (2013) 082501]. Using this revolutionary technique, we achieved the first mass measurements of the neutron-deficient indium isotopes $^{99-101}$In in the direct vicinity of the doubly-magic $^{100}$Sn ($N$=$Z$=50). These results allowed us to resolve a stark discrepancy in the β-decay energy of $^{100}$Sn and thus provided a new atomic mass value of $^{100}$Sn via its direct β-decay into $^{100}$In [Nature Phys. 17, 1099 (2021)].
In this context, I will also present the first hyperfine spectroscopy results of these neutron-deficient indium isotopes, which provided the first experimental evidence for the nuclear deformation toward the doubly-magic $^{100}$Sn.
