Oct 20 – 23, 2026
RIKEN
Asia/Tokyo timezone
Registration deadline is October 12!!

Nuclear spectroscopy at KISS/KISS-1.5 to explore the origin of heavy elements synthesized by r-process

Oct 20, 2026, 5:30 PM
20m
Headquarters Building 2F (RIKEN)

Headquarters Building 2F

RIKEN

2-1, Hirosawa, Wako, Saitama 351-0198, Japan
Oral Presentation Scientific Session

Speaker

Yoshikazu HIRAYAMA (IPNS, KEK)

Description

The KEK Wako Nuclear Science Center (WNSC) has developed the KEK Isotope Separation System (KISS) at RIKEN to study the nuclear properties such as half-lives and atomic masses of the nuclei in the vicinity of neutron magic number N = 126, trans-uranium elements, and actinides. This research aims to explore the origin of heavy elements synthesized by the rapid neutron capture process.
The multinucleon transfer (MNT) reactions combined with a gas cell system enable us to produce these nuclei, which are difficult to study in other facilities. At the KISS facility, these neutron-rich nuclei have been produced by MNT reactions of 136Xe/238U beams and the production targets of W, Ir, and Pt. Their nuclear spectroscopy, including decay studies at a beta-gamma decay station, precise mass measurements using MRTOF-MS, and laser spectroscopy have been successfully performed.
To further this research, WNSC have started the construction of KISS-1.5 drastically to increase the experimental efficacy for nuclear spectroscopy.
In the talk, we will introduce the KISS facility, report the recent experimental results, and discuss future perspectives at KISS-1.5.

Category Experiment

Author

Yoshikazu HIRAYAMA (IPNS, KEK)

Presentation materials

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