Development of actinide target system for GARIS-II and its application

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K05116
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Institute of Physical and Chemical Research
• Principal Investigator: KAJI DAIYA 国立研究開発法人理化学研究所, 仁科加速器研究センター, 仁科センター研究員 (00391912)
• Research Collaborator: MORIMOTO Kouji 国立研究開発法人理化学研究所, 仁科加速器研究センター, チームリーダー (00332247)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 超重元素 / 標的 / 薄膜 / アクチノイド

Outline of Final Research Achievements

We developed gas-cooled rotating actinide-target system for gas-filled recoil ion separator GARIS-II. We developed a new sputtering system, which was installed magnetron source with 1-inch size, for preparing thick 238U metallic target. And also, we tried to optimize the conditions for preparing actinide-target using electro-deposition method. The 238U target was utilized for studying on production and decay properties of Cn (Z=112) isotopes via the reaction 48Ca+238U→286Cn* using a new gas-filled recoil ion separator GARIS-II.
A double-layered target system and an identification method (target ID) for individual targets mounted on a rotating wheel using correlation with evaporation residues were newly developed for the study of superheavy elements (SHE). The target ID method can be utilized for masking a target, measuring an excitation function without changing the beam energy from the accelerator, and searching for SHE nuclides using multiple targets during a single irradiation.

Free Research Field

実験核物理