Experimental studies of neutron-rich nuclei around N = 126 at KEK isotope separation system

Nuclear parameters such as lifetimes and masses of the waiting point nuclei of r-process nucleosynthesis are significant to investigate its astrophysical environment. However, the difficulty in the production of extremely neutron-rich nuclei at the 126 neutron closed shell makes their experimentalst...

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Bibliographic Details
Main Authors: Watanabe Yutaka, Hirayama Yoshikazu, Mukai Momo, Ahmed Murad, Kakiguchi Yutaka, Miyatake Hiroari, Oyaizu Michihiro, Schury Peter, Wada Michiharu, Kimura Sota, Ishiyama Hironobu, Jeong Sun-Chan, Moon Jun Young, Park Jin Hyung
Format: Article
Language:English
Published: EDP Sciences 2019-01-01
Series:EPJ Web of Conferences
Online Access:https://www.epj-conferences.org/articles/epjconf/pdf/2019/28/epjconf_nsd2019_01069.pdf
Description
Summary:Nuclear parameters such as lifetimes and masses of the waiting point nuclei of r-process nucleosynthesis are significant to investigate its astrophysical environment. However, the difficulty in the production of extremely neutron-rich nuclei at the 126 neutron closed shell makes their experimentalstudies unfeasible. Therefore, the theoretical nuclear models play crucial roles in the simulation of the r-process nucleosynthesis. The systematic nuclear spectroscopy of the neutron-rich nuclei around the 126 neutron closed shell provides significant inputs to those theoretical models to improve their predictability for the waiting point nuclei. We are developing KEK Isotope Separation System (KISS) to perform the systematic nuclear spectroscopy of those neutron-rich nuclei. The nuclei of interest are produced by multi-nucleon transfer reactions between 136Xe and 198Pt. The experimental study demonstrated its promising potential to produce them. We have successfully performed the β­γ spectroscopy and the laser ionization spectroscopy at KISS using the nuclear production by the multi-nucleon transfer reactions.
ISSN:2100-014X