Abstract
We performed in-gas-cell laser ionization spectroscopy of , which were produced by multinucleon transfer reactions at the KEK Isotope Separation System (KISS). The nuclei of interest were identified through -decay spectroscopy and a newly applied multireflection time-of-flight mass spectrograph (MRTOF-MS). From the study of laser resonance spectra, isotope shifts (ISs) of the transition nm for and were measured for the first time. The change in the mean-square charge radius and the quadrupole deformation parameter were deduced from the IS measurements. The results were compared with the theoretical calculations and the predicted shape transition at is discussed.
- Received 1 June 2020
- Accepted 17 August 2020
DOI:https://doi.org/10.1103/PhysRevC.102.034309
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