Bulletin of the American Physical Society
5th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Volume 63, Number 12
Tuesday–Saturday, October 23–27, 2018; Waikoloa, Hawaii
Session 1WBB: Physics and Chemistry of the Heaviest Elements and Nuclei II
11:00 AM–12:30 PM,
Tuesday, October 23, 2018
Hilton Room: Kohala 1
Chair: Hideyuki Sakai, RIKEN Nishina Center
Abstract ID: BAPS.2018.HAW.1WBB.3
Abstract: 1WBB.00003 : Towards In-beam Spectroscopy of the Heaviest Nuclei with Gammasphere and AGFA*
12:00 PM–12:30 PM
(Argonne Natl Lab)
(Argonne Natl Lab)
Spectroscopy of trans-fermium nuclei around the Z=100 and N=152 deformed shell gaps has been an active area of research at the ATLAS facility at Argonne National Laboratory for many years since the pioneering experiments which led to the observation of a rotational band and K-isomers in 254No using the Gammasphere gamma-ray detector array and the Fragment Mass Analyzer (FMA). Rotational bands and K-isomers in trans-fermium nuclei provide stringent tests of nuclear models used to describe properties of the heaviest elements such as for example their magic numbers which determine the location of the long sought after island of super-heavy nuclei. Recent highlights include first observation of two fast isomers in the heaviest known even-even N=150 isotone 254Rf employing the digital DAQ and the determination of the fission barrier in 254No from g-ray energy-spin distributions obtained with Gammasphere. To extend these studies to even heavier nuclei the Argonne Gas-filled Fragment Analyzer (AGFA) was designed and is currently being commissioned. Due to charge-state focusing AGFA has a factor of about ten higher efficiency compared to the FMA. Gammasphere combined with AGFA offer unparalleled opportunities for in-beam spectroscopic studies of trans-fermium nuclei. During the talk, first results obtained with AGFA and Gammasphere will be presented and prospects for in-beam spectroscopy of the heaviest nuclei will be discussed.
*On behalf of Gammasphere/FMA/AGFA collaboration. This material is based upon work supported by the U.S Department of Energy, Office of Science, Office of Nuclear Physics, under contract number DE-AC02-06CH11357. This research used resources of ANL's ATLAS facility, which is a DOE Office of Science User Facility.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.HAW.1WBB.3
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