{"id":1063,"date":"2018-07-26T14:30:18","date_gmt":"2018-07-26T05:30:18","guid":{"rendered":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/1063\/"},"modified":"2018-12-19T21:44:46","modified_gmt":"2018-12-19T12:44:46","slug":"_exploring_the_most_neutron-rich_nuclei_and_beyond","status":"publish","type":"seminar","link":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/1063\/","title":{"rendered":"Exploring the most neutron-rich nuclei and beyond"},"content":{"rendered":"

How many neutrons can be added to a given atomic nucleus? It sounds like a simple question, <\/span>but this is still an unresolved, fundamental question in nuclear physics. Indeed, the neutron-rich bound limit, <\/span>called neutron-drip line in the nuclear chart, has been established only up to oxygen isotopes (Z=8). <\/span>We also ask ourselves how atomic nuclei behave near and beyond the neutron drip line. <\/span>We know that a cluster of the order of 1057<\/sup> neutrons can form a neutron star, much beyond the neutron drip line. <\/span>As such, neutron-rich nuclei can be a femto-scale laboratory for neutron stars, realized on Earth. <\/span>We also note that extremely neutron-rich nuclei may be produced, for a very short period, <\/span>in explosive environments in the universe, such as Type-II supernova or neutron-star mergers. <\/span>How such extremely neutron-rich nuclei play a role in the nucleosynthesis is also one of the key questions in current nuclear and astrophysics. <\/span>In this seminar, after some introduction, I present how extremely neutron-rich nuclei are produced and studied in the laboratory. <\/span>By showing some recent experimental results on extremely neutron-rich nuclei from helium to oxygen isotopes, <\/span>I’ll illustrate characteristic features of such nuclei and physics behind [1,2]. I will focus, for instance, <\/span>the recently observed very weakly “unbound” two neutron state in 26<\/sup>O [2]. <\/span>These experiments have been performed using intermediate-energy (c.a. 200MeV\/nucleon) rare-isotope beams at RIBF (RI-Beam factory) at RIKEN [3,4], <\/span>which is now the world center for rare isotope physics. <\/span>I also mention the implication of these recent experimental results in terms of neutron-star physics. <\/span>Finally, I will provide perspectives on the near future exploration of exotic nuclei towards\/beyond the neutron-rich limit [3,4].<\/span><\/p>\n

[1] Y. Togano, T. Nakamura et al., Phys. Lett. B 761<\/b>, 412 (2016).<\/span><\/p>\n

<\/span>[2] Y. Kondo, T. Nakamura et al., Phys. Rev. Lett. 116<\/b>, 102503 (2016).<\/span><\/p>\n

[3] T. Nakamura, H. Sakurai, H. Watanabe, Prog. Part. Nucl. Phys. 97<\/b>, 53 (2017).<\/span><\/p>\n

[4] \u4e2d\u6751\u9686\u53f8\u8457\u300c\u4e0d\u5b89\u5b9a\u6838\u306e\u7269\u7406\u300d\u57fa\u672c\u6cd5\u5247\u304b\u3089\u8aad\u307f\u89e3\u304f\u7269\u7406\u5b66\u6700\u524d\u7dda\uff18\u3001\u5171\u7acb\u51fa\u7248<\/span><\/p>\n","protected":false},"featured_media":0,"template":"","tags":[],"seminar_category":[55],"acf":{"s_now_accepting":true,"s_date_order":"2018-07-25 17:00:00","s_date_end":null,"s_date_text":"","s_text":"Takashi Nakamura","s_place":"KMI Science Symposia (ES635)","s_place_other":"","s_categoryother":"","s_poster":"

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