Measurement of decay properties of the neutron-rich Se to Y isotopes

Bulletin of the American Physical Society

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2021 Fall Meeting of the APS Division of Nuclear Physics

Volume 66, Number 8

Monday–Thursday, October 11–14, 2021; Virtual; Eastern Daylight Time

Session JD: Nuclear Astrophysics IV

9:30 AM–11:18 AM, Wednesday, October 13, 2021
Room: The Loft

Chair: Harrison Sims, Rutgers University, New Brunswick

Abstract: JD.00005 : Measurement of decay properties of the neutron-rich Se to Y isotopes*

10:18 AM–10:30 AM

Abstract

Presenter:

Neerajan Nepal
(Central Michigan University)

Authors:

Neerajan Nepal
(Central Michigan University)

Alejandro Algora
(Instituto de Fisica Corpuscular, Valencia, Spain)

Alfredo Estrade
(Central Michigan Univ)

Shunji Nishimura
(RIKEN Nishina Center, Japan)

Jorge Agramunt
(Instituto de Fisica Corpuscular, Valencia, Spain)

Deuksoon Ahn
(RIKEN Nishina Center, Japan)

Carlo Bruno
(University of Edinburgh, United Kingdom)

Roger Caballero-Folch
(TRIUMF, Canada)

Tom Davinson
(University of Edinburgh, UK)

Iris Dillmann
(TRIUMF, Canada)

Alexandra Fijalkowska
(Rutgers University, USA)

Naoki Fukuda
(RIKEN Nishina Center, Japan)

Shintaro Go
(RIKEN Nishina Center, Japan)

Robert Grzywacz
(University of Tennessee)

Tadaaki Isobe
(RIKEN Nishina Center, Japan)

Shigeru Kubono
(RIKEN Nishina Center, Japan)

Jiajian Liu
(University of Hong Kong)

Giuseppe Lorusso
(National Physical Laboratory, Teddington, UK)

Keishi Matsui
(University of Tokyo, Japan)

Anabel Morales
(Instituto de Fisica Corpuscular, Valencia, Spain)

S.E.A. Orrigo
(Instituto de Fisica Corpuscular, Valencia, Spain)

Vi H. Phong
(RIKEN Nishina Center, Japan)

Bertis C Rasco
(Oak Ridge National Laboratory)

Krzysztof Rykaczewski
(Oak Ridge National Laboratory)

Hiroyoshi Sakurai
(RIKEN Nishina Center, Japan)

Yohei Shimizu
(RIKEN Nishina Center, Japan)

Dan Stracener
(Oak Ridge National Laboratory)

Toshiyuki Sumikama
(RIKEN Nishina Center, Japan)

Hiroshi Suzuki
(RIKEN Nishina Center, Japan)

Jose L Tain
(Instituto de Fisica Corpuscular, Valencia, Spain)

Hiroyuki Takeda
(RIKEN Nishina Center, Japan)

Ariel Tarifeno-Saldivia
(Universitat Politecnica de Catalunya (UPC), Spain)

Alvaro Tolosa-Delgado
(Instituto de Fisica Corpuscular, Valencia, Spain)

Marzena Wolinska-Cichocka
(Heavy Ion Laboratory, University of Warsaw, Poland)

Jin Wu
(Argonne National Laboratory)

Rin Yokoyama
(University of Tennessee)

Collaboration:

BRIKEN collaboration

β-decay half-lives (T_1/2) and β-delayed neutron emission probabilities (P_xn) are two essential ingredients of nucleosynthesis calculations for the rapid neutron capture process (r-process). Using the state-of-the-art instrumentation β-delayed neutron detector at RIKEN (BRIKEN) in the Radioactive Ion Beam Factory (RIBF) at the RIKEN laboratory in Japan, we did an experiment to measure the decay properties of neutron-rich isotopes of Se to Y around mass A = 100. The half-lives and β-delayed neutron emission probabilities of thirty-four isotopes measured in this experiment will be presented. In addition, implications of the new measured values for r-process models and nuclear structure based on the decay properties will be discussed.

*This research was sponsored in part by the National Science Foundation Grant PHY 1714153 and by the Office of Nuclear Physics, U.S. Department of Energy under contracts DE-AC05-00OR22725

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