2015 Fiscal Year Final Research Report

Pushing the frontiers to superallowed decays near 100Sn at JAEA

Research Project

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Project/Area Number	26887048
Research Category	Grant-in-Aid for Research Activity Start-up
Allocation Type	Single-year Grants
Research Field	Particle/Nuclear/Cosmic ray/Astro physics
Research Institution	Japan Atomic Energy Agency
Principal Investigator	Orlandi Riccardo 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門先端基礎研究センター, 研究員 (50737608)
Research Collaborator	NISHIO Katsuhisa 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門先端基礎研究センター MAKII Hiroyuki 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門先端基礎研究センター HIROSE Kentaro 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門先端基礎研究センター NISHINAKA Ichiro 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門先端基礎研究センター IKEZOE Hiroshi 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門先端基礎研究センター GRZYWACZ Robert Univ. of Tennessee GO Shintaro Univ. of Tennessee XIAO Yongchi Univ. of Tennessee RYKACZEWSKI Krzysztof Oak Ridge National Laboratory GROSS Carl Oak Ridge National Laboratory BREWER Nathan Oak Ridge National Laboratory ANDREYEV Andrei University of York JENKINS David University of York DAVIES Paul University of York
Project Period (FY)	2014-08-29 – 2016-03-31
Keywords	nuclear structure / alpha decay / proton-rich nuclei
Outline of Final Research Achievements	An experimental program to discover and identify the heaviest possible nuclei with the same number of protons and neutrons was started at the JAEA Tandem accelerator laboratory. The decay properties of these isotopes provide important data to understand at a fundamental level how the alpha particle forms in the nucleus. A new setup was developed in collaboration with international colleagues. The discovery of new isotope113Ba (Z=56, N=57) was attempted. One observed event reveals that 113Ba was produced for the first time. The experiment for the discovery of 108Xe and 104Te, the ultimate goal of this program, started in December 2015. Due to the long measuring time needed, it will be resumed in a following experimental campaign.
Free Research Field	nuclear physics