Year: 2025
Type: conference-paper
Abstract: In this work, a new spectroscopy is reported for the the odd-odd 100Nb nucleus which lies one neutron below the well known N=60 island of deformation in the A~100 mass region where a sudden shape transition from semi-spherical to well deformed ground state occurs. The measurement involved prompt and prompt-delayed γ-ray spectroscopy of fission fragments isotopically identified using the combination of the Variable Mode Spectrometer (VAMOS++), the Advanced Gamma Tracking Array (AGATA) and the EXOtic GAMma-ray spectrometer (EXOGAM). In addition, a dataset of the spontaneous fission of 252Cf measured using Gammasphere was used. A new link between the rotational band previously believed to be the ground state band and the isomer of 12.4(3) μs isomer was found, resulting in a revision of the level scheme. The new level scheme suggests that the rotational band is built on the long-lived 5+ isomer instead. Moreover, a new rotational band was identified above the predicted 10− isomer. These results are in agreement with IBFFM calculations predicting a non deformed ground state in this nucleus.
Source: EPJ Web of Conferences
Institutions: Lyon 1 Université, Centre National de la Recherche Scientifique, Université de Lyon, Institut National de Physique Nucléaire et de Physique des Particules, Institut de Physique des 2 Infinis de Lyon, Vanderbilt University, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Grand Accélérateur National d'Ions Lourds, Variable Energy Cyclotron Centre, Homi Bhabha National Institute
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4411655398