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Commemorative Ceremony for SHARAQ

  • School of Science Newsletter Editorial Committee
Figure 1

Ceremony Participants at SHARAQ

Last year, the research cooperation agreement on heavy ion physics concluded between CNS (Center for Nuclear Study, University of Tokyo) and RIKEN in April 1998 celebrated its 10th anniversary.

This year, the construction of SHARAQ (Spectroscopy with High-resolution Analyzer of Radioactive Quantum beams) was constructed. SHARAQ had been co-built since 2005 by CNS and Prof. Hideyuki Sakai's group (Department of Physics) together with RIKEN Nishina Center for Accelerator-Based Science in response to the ”Basic Agreement on Promotion of Collaboration and Cooperation between The University of Tokyo and RIKEN“. A commemorative ceremony was held at the Conference Room of RIKEN RIBF Bldg. from 16:00 on Tuesday, June 30, 2009.

Introductory overview of the high resolution magnetic spectrometer SHARAQ was given by Prof. Hideyuki Sakai (Professor of Physics), who implemented the construction of main parts of SHARAQ. Previously, it was impossible to make interesting states in nuclei that characterize specific properties of magnetic motions because not only heat (energy) but shock (momentum) are always given to a nucleus through a reaction if a stable nucleus is used as a beam. However, if an unstable nucleus is used as a beam, a reaction occurs that can utilize its internal energy (extra-mass). By using this reaction at SHARAQ, we can heat nuclei without shock, which makes researches on unknown states become possible. From such researches, characteristic properties of neutron star might be gained.

The introductory overview above was followed by the greetings from: Masafumi MAEDA (Managing Director, Executive Vice President, former Director of Institute of Industrial Science), Kenji OKUMA (Managing Director of RIKEN), Takaharu OTSUKA (Director of CNS), Yano YASUSHIGE (Director of RIKEN Nishina Center for Accelerator-Based Science), Akito ARIMA (Professor Emeritus), and Toshio YAMAGATA (Dean of School of Science). Prof. Otsuka, Director of CNS, showed his expectation toward the development of research on unstable nucleus itself in addition to the uniqueness of knowing stable nuclei using unstable nuclei.

Also, Prof. Arima told that nuclear physicists in the University should pay attention to researches that benefit the society such as the establishment of disposal method for used nuclear fuel. On the other hand, Prof. Yamagata, Dean of School of Science, said that what is expected from the society toward the School of Science is research on basic sciences.

From 17:00, the ceremony participants started looking around the facility and were lectured about the details watching SRC (Superconductive Ring Cyclotron) and SHARAQ with their own eyes. A banquet was held at Hirosawa Club at 18:00, during which Norimichi KOJIMA (Managing Director, Executive Vice President) and Prof. R.H. Siemssen (KVI, Groningen University, The Netherlands) who got behind the construction of SHARAQ as the Head of CNS External Evaluation Committee delivered heartwarming speeches for SHARAQ.