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 F11: Minisymposium: Accessing the Third r-Process Peak: Nuclear Structure and Fission Studies
9:00 AM–11:45 AM,
Thursday, November 30, 2023
Hilton Waikoloa Village
Room: Kings 1
Chair: Maxime Brodeur, University of Notre Dame
Abstract: F11.00005 : Beta-delayed neutron measurements of neutron-rich nuclei near N = 126 at RIBF*
10:15 AM–10:30 AM
Presenter:
Tik Tsun Yeung
(The University of Tokyo)
Authors:
Tik Tsun Yeung
(The University of Tokyo)
Shunji Nishimura
(RIKEN Nishina Center)
Vi H Phong
(RIKEN Nishina Center)
Anabel Morales
(Instituto de Física Corpuscular, CSIC-UV)
Jin Wu
(Brookhaven National Laboratory)
Tadaaki Isobe
(RIKEN Nishina Center)
Megumi Niikura
(RIKEN Nishina Center)
Hiroyoshi Sakurai
(RIKEN Nishina Center)
Tom Davinson
(University of Edinburgh)
Iris Dillmann
(TRIUMF)
Alfredo Estrade
(Central Michigan University)
Naoki Fukuda
(RIKEN Nishina Center)
Robert Grzywacz
(University of Tennessee)
Oscar Hall
(University of Edinburgh)
Yoshikazu Hirayama
(KEK)
Eiji Ideguchi
(RCNP, Osaka University)
Kei Kokubun
(The University of Tokyo)
Filip G Kondev
(Argonne National Laboratory)
Rurie Mizuno
(The University of Tokyo)
Momo Mukai
(Nagoya University)
Neerajan Nepal
(Central Michigan University)
Mohamad Nor Nurhafiza
(Osaka University)
Krzysztof Piotr P Rykaczewski
(Oak Ridge National Laboratory)
Lewis Sexton
(University of Edinburgh)
Jose L Tain
(Instituto de Física Corpuscular, CSIC-UV)
Yutaka X Watanabe
(KEK)
Rin Yokoyama
(CNS, The University of Tokyo)
Collaboration:
BRIKEN
We will present recent progress in the BRIKEN experiment [3] at RIBF, RIKEN Nishina Center. Particle identification was confirmed by the BigRIPS separator and the silicon dE telescope. For the first time at the ZeroDegree spectrometer, half-lives and beta-delayed neutron-emission probabilities (Pn) of N ~ 126 exotic isotopes were measured by the WAS3ABi β-counting system [4] and the BRIKEN neutron counter [5]. The analysis methods used and selected preliminary results will be discussed.
References
[1] P. Möller et al., At. Data Nucl. Data Tables, 125, 1-192 (2019).
[2] T. Suzuki et al., Astrophys. J. 859(2), 133 (2018).
[3] J. Wu et al., RIBF NP-PAC Proposal, NP1712-RIBF158 (2017).
[4] S. Nishimura, Prog. Theor. Exp. Phys., 2012(1), 03C006 (2012).
[5] A. Tolosa-Delgado et al., Nucl. Instrum. Methods. Phys. Res. A, 925-133 (2019).
*This work was supported by JSPS KAKENHI Grant Numbers JP20H05648 and JP23KJ0727. T.T.Y. was supported by FoPM, WINGS Program, the University of Tokyo; JSR Fellowship, CURIE, the University of Tokyo; Teijin Kumura Scholarship; and JASSO Honors Scholarship.
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