Sobre o evento:
How do extremely neutron-rich nuclei behave at the limit of nuclear binding? The seminar addresses fundamental questions concerning nuclear structure, nuclear interactions, and multi-neutron correlations at and beyond the neutron drip line. The talk will focus on multi-neutron clustering, which is expected to become increasingly important in nuclei near the neutron drip line. After discussing some common features of cluster formation across different scales, from hadrons and nuclei to atoms and molecules [1], I will focus on neutron-rich nuclei. I will first discuss dineutron (2n) correlations [2], in which two neutrons develop a strong spatial correlation in the low-density surface region of a nucleus. I will show how such correlations can be probed through Coulomb breakup, illustrated by recent studies of 19B [3] and 22C. I will then present recent Coulomb-breakup results for 8He [4], where correlations among the four valence neutrons may play an important role in the nuclear surface. I will also discuss the observation of 28O [5], a candidate for a doubly magic nucleus, and possible four-neutron correlations in this extremely neutron-rich system. All the experimental results presented here were obtained using the large-acceptance, multi-purpose spectrometer SAMURAI at the RI-Beam factory (RIBF), RIKEN, Japan. Finally, I will introduce the recent development of a new-generation neutron detector array, NEOLITH, designed to explore multi-neutron correlations and clustering near and beyond the neutron drip line.
Minibiografia do palestrante:
Takashi Nakamura received his Doctor of Science degree from the University of Tokyo in 1996. Following research appointments at RIKEN, the University of Tokyo, and Michigan State University, he joined the Department of Physics at Tokyo Institute of Technology as an Associate Professor and was promoted to Full Professor in 2008. In 2024, Tokyo Institute of Technology merged with Tokyo Medical and Dental University to form Institute of Science Tokyo. His research expertise lies in experimental nuclear physics, with a particular focus on the structure of extremely neutron-rich nuclei near and beyond the neutron drip line. He played a central leadership role in the SAMURAI collaboration at RIBF, serving as Chair of the SAMURAI Collaboration Board from 2012 to 2023. His current research interests include the development of NEOLITH, a next-generation neutron detector array aimed at exploring multi-neutron systems beyond the neutron drip line.
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