Excited states of the \ (^207-213 Ac\) nuclei were studied by employing fusion–evaporation reactions at the RITU and MARA separators of the Accelerator Laboratory of the University of Jyväskylä, Finland. In three of the four conducted experiments prompt \ (\) -ray transitions were measured by employing the JUROGAM3 spectrometer, while the fourth experiment focused on delayed spectroscopy of \ (^207 Ac\). Level schemes were established for odd-\ (A\) isotopes, and those are compared to the systematics set by nearby astatine and francium nuclei, as well as to the excited states of the respective even–even isotone cores. Abstract Published by the Jagiellonian University 2026 authors
Auranen et al. (Tue,) studied this question.
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