| 研究実績の概要 |
In FY19 the preparatory phase of the HiCARI project "High-resolution Cluster Array at RIBF" has been completed.
Two workshops were organized. In the first one 10-12 April 2019 in Darmstadt, Germany, the project has been presented and the physics case has been established. A call for pre-proposals as well as the formation of a steering committee was established. In the second workshop 26-28 August 2019 in Osaka, Japan, proposals for the NP-PAC were discussed and prepared. They were presented to the NP-PAC committee in December 2019, and 9 experiments with a total number of 43.5 days for experiment were granted. The project was highly evaluated by the committee. The experiments investigate shell structure and collectivity in very exotic nuclei all over the nuclear chart. Using different experimental techniques with high-resolution gamma-ray spectroscopy unprecedented new information will become available.
In the meantime, the on-site preparations took place. Infrastructure support and readout electronics for a digital acquisition system were obtained, installed at the facility, and tested. The high-purity Germanium detectors were delivered from Europe, US, and Japan, and installed at the target location. The whole system was tested and commissioned with test sources.
The development of the simulation software has been finished. The realistic performance of the setup was also presented to the NP-PAC. The event-building and correlation software for the data analysis is also ready. The development of a high-level analysis tool-kit is in progress.
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| 今後の研究の推進方策 |
In FY2020 we plan to finish the commissioning, and start the experimental campaign. 9 Experiments will investigate the structure of very neutron- and proton-rich nuclei. Highlights are the formation of magic numbers in very exotic nuclei as well as the development of collective phenomena outside of the valley of stability.
It is planned to perform a test and commissioning experiment, which will be the basis of a technical publication to be submitted by the end of FY20. First new results from HiCARI will be presented at conferences, journal publications will follow in the coming years. A workshop to discuss the details of the analysis is planned for the later half of FY20.
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