2020

Ayet San Andrés, Samuel; Mollaebrahimi, Ali; Dickel, Timo; Bergmann, Julian; Ebert, Jens; Geissel, Hans; Greiner, Florian; Haettner, Emma; Hornung, Christine; Kalantar-Nayestanaki, Nasser; Miskun, Ivan; Plaß, Wolfgang R.; Purushothaman, Sivaji; Rink, Ann-Kathrin; Scheidenberger, Christoph; Weick, Helmut; Bagchi, Soumya; Constantin, Paul; Finlay, Andrew; Kaur, Satbir; Lippert, Wayne; Mardor, Israel; Mei, Bo; Moore, Iain; Otto, Jan-Hendrick; Pietri, Stephane; Pohjalainen, Ilkka; Prochazka, Andrej; Rappold, Christophe; Reiter, Moritz P.; Tanaka, Yoshiki K.; Winfield, John S.

Neutron-deficient iodine isotopes, 116I and 114I, were produced at relativistic energies by in-flight fragmentation at the Fragment Separator (FRS) at GSI. The FRS Ion Catcher was used to thermalize the ions and to perform highly accurate mass measurements with a Multiple-Reflection Time-of-Flight Mass-Spectrometer (MR-TOF-MS). The masses of both isotopes were measured directly for the first time. The half-life of the 114I was measured by storing the ions in an RF quadrupole for different storage times and counting the remaining nuclei with the MR-TOF-MS. The measured half-life was used to assign the ground state to the measured 114I ions. Predictions on the possible α-decay branch for 114I are presented based on the reduced uncertainties obtained for the Qα-value. Systematic studies of the mass surface were performed with the newly obtained masses, showing better agreement with the expected trend in this mass region.