Annual Report 2019

We are pleased to release a new RCNP Annual Report on our activities in 2019, the first year in which we started the operation as an International Joint Usage/Research Center. Although the operation of the AVF cyclotron has been suspended due to the scheduled renewal, the following results were obtained through active research activities.

As with the accelerator, the quiescent MuSIC provides a good example of the wide range of applications of the mon beam, including the results of the analysis of archaeological samples using negative muons and the results of the study of radiation-induced soft errors in semiconductor devices.

The LEPS2/BGOeeg group reported the results of the flagship experiment, η'-bound nuclei search, and the J-PARC charmed baryon spectroscopy experiment (E50), which aims to elucidate the diquark correlation by replacing one quark in a baryon with a heavy charm quark, reported the readiness to carry out the high coefficient experiment.

On the fundamental physics, TUCAN, which aims to measure the neutron electric dipole moment with a sensitivity on the order of 10^-27 e・cm, reported the first UCN production at TRIUMF. The CANDLES Group, which conducts double-beta decay experiments using CaF2 crystals, has developed a method for efficiently selecting high purity crystals with low radioactive contaminants in preparation for full-scale measurements in the future.

The theoretical group reported a comprehensive summary on the research on nuclear clustering by new reaction probes. As a new application of lattice gauge theory simulation, investigation of the dark matter interaction in hidden Yang-Mills theory is also reported.

Finally, the progress of the upgrading work for the resumption of the AVF cyclotron that you are looking forward to is updated in this report.

Sincerely yours,

Takashi Nakano
Director of Research Center for Nuclear Physics