Bulletin of the American Physical Society
6th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Sunday–Friday, November 26–December 1 2023; Hawaii, the Big Island
Session M05: Nuclear Structure VI
2:00 PM–4:00 PM,
Friday, December 1, 2023
Hilton Waikoloa Village
Room: Queens 4
Chair: Futoshi Minato, Kyushu University
Abstract: M05.00007 : Decay-correlated time-of-flight mass spectroscopy using multi-reflection time-of-flight mass spectrographs*
3:30 PM–3:45 PM
Presenter:
Peter Schury
Authors:
Peter Schury
Toshitaka Niwase
(KEK Wako Nuclear Science Center)
Michiharu Wada
(KEK Wako Nuclear Science Center)
Marco Rosenbusch
(RIKEN Nishina Center)
Pierre Brionnet
(RIKEN Nishina Center)
Yoshikazu Hirayama
(KEK Wako Nuclear Science Center)
Daiya Kaji
(RIKEN Nishina Center)
Sota Kimura
(KEK Wako Nuclear Science Center)
Kouji Morimoto
(RIKEN Nishina Center)
Momo Mukai
(Nagoya University)
Yutaka X Watanabe
(KEK Wako Nuclear Science Center)
Hiromitsu Haba
(RIKEN)
Hermann Wollnik
(New Mexico State University)
Hironobu Ishiyama
(RIKEN Nishina Center)
Wenduo Xian
(Hong Kong University)
Aiko Takamine
(RIKEN Nishina Center)
By constructing specialized ion detectors that allow for precise determination of ion impact timing and can also detect radioactive decays, we have found that the MRTOF-MS can become an even more effective tool. Such detectors allow decay-correlated mass spectroscopy. Such decay-correlated time-of-flight measurements allow for a strong suppression of stable molecular background ions that are always extracted from even the cleanest gas stopping cell. This allows for high-confidence in measurements of very low yield species such as superheavy nuclides. When dealing with alpha-decaying species (such as superheavy nuclides) we can gate on specific decay energies to use decay correlated mass spectroscopy to further enhance confidence in the identity of the mass-analyzed nuclides. Using decay-correlations we can also perform half-life measurements simultaneous to mass measurements, which further increases the efficacious utilization of limited online machine time while also allowing for a further confirmation of the identity of exotic nuclides whose masses have not been previously determined.
We will present some of our recent work in measuring dubnium isotopes through decay-correlated mass spectroscopy, along with some preliminary results showing the utility for beta-decaying nuclides. We will also present future plans for development of version capable of performing gamma (and x-ray) correlated mass spectroscopy to enhance the identification of neutron-rich nuclides produced in multi-nucleon reactions.
*Japan Society for the Promotion of Science KAKENHI (Grant Numbers 2200823, 24224008, 24740142, 15H02096, 17H06090, 19K03899, 18H03711, and 15K05116)
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