Complete β-decay study of deformed, odd-odd <sup>104,104m</sup>Nb<sup>*</sup>
ORAL
Abstract
Properties of deformed, neutron-rich nuclei in the A~110 mass region are essential ingredients in
the interpretation of r-process nucleosynthesis and fission-like applications where little is known
owing to difficulties in the production of these nuclei at existence RIB facilities.
Predicated on these ideas, we have initiated a dedicated decay spectroscopy experimental program
at Argonne National Laboratory, by combining the CARIBU facility with the newly developed
Gammasphere Decay Station. The initial focus was to study β- decays of ground state and excited
isomeric state of several deformed odd-odd nuclei that selectively populate a variety of structures
in the daughter nucleus.
In this work, we will present new results from time-correlated β-decay spectroscopy studies of the
ground state (6.1 (1) s) and isomer (0.89 (1) s) in the deformed 104Nb nucleus. The new data will
be compared with predictions from multi-quasiparticle blocking calculations. Significant
differences in terms of beta-decay feeding pattern and the structure of the observed isomers with
recent measurements utilizing the Total Absorption Gamma-ray Spectroscopy technique will also
be discussed.
the interpretation of r-process nucleosynthesis and fission-like applications where little is known
owing to difficulties in the production of these nuclei at existence RIB facilities.
Predicated on these ideas, we have initiated a dedicated decay spectroscopy experimental program
at Argonne National Laboratory, by combining the CARIBU facility with the newly developed
Gammasphere Decay Station. The initial focus was to study β- decays of ground state and excited
isomeric state of several deformed odd-odd nuclei that selectively populate a variety of structures
in the daughter nucleus.
In this work, we will present new results from time-correlated β-decay spectroscopy studies of the
ground state (6.1 (1) s) and isomer (0.89 (1) s) in the deformed 104Nb nucleus. The new data will
be compared with predictions from multi-quasiparticle blocking calculations. Significant
differences in terms of beta-decay feeding pattern and the structure of the observed isomers with
recent measurements utilizing the Total Absorption Gamma-ray Spectroscopy technique will also
be discussed.
** Work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics,under Contract No. DE-AC02-06CH11357, the National Nuclear Security Administration, Officeof Defense Nuclear Nonproliferation R & D (NA-22) and National Science Foundation PHY-1907409, Louisiana State Board of Regents RCS LEQSF(2016-19)-RD-A-09 and LSU's DOEOffice of Science grant (DE-SC0021315).
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Presenters
-
Soumen Nandi
- Argonne National Laboratory
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA