| Research Collaborator |
Togano Yasuhiro 立教大学, 理学部, 助教
Kobayashi Nobuyuki 大阪大学, 核物理研究センター, 特任助教
Tostevin J. A. Univ of Surrey, Professor
Hideaki Otsu 理化学研究所, 仁科加速器研究センター, チームリーダー
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| Budget Amount *help |
¥210,990,000 (Direct Cost: ¥162,300,000、Indirect Cost: ¥48,690,000)
Fiscal Year 2016: ¥15,990,000 (Direct Cost: ¥12,300,000、Indirect Cost: ¥3,690,000)
Fiscal Year 2015: ¥49,270,000 (Direct Cost: ¥37,900,000、Indirect Cost: ¥11,370,000)
Fiscal Year 2014: ¥43,680,000 (Direct Cost: ¥33,600,000、Indirect Cost: ¥10,080,000)
Fiscal Year 2013: ¥49,010,000 (Direct Cost: ¥37,700,000、Indirect Cost: ¥11,310,000)
Fiscal Year 2012: ¥53,040,000 (Direct Cost: ¥40,800,000、Indirect Cost: ¥12,240,000)
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| Outline of Final Research Achievements |
We have studied properties of very neutron-rich nuclear matter in order to elucidate the key properties of neutron star matter. (1)We have studied the pygmy dipole resonance in neutron-rich Ca isotopes using the newly constructed gamma-ray calorimeter. (2)We performed Coulomb breakup experiments of the two-neutron halo nuclei 19C and 19B, where enhanced electric dipole strengths are observed. This suggests dineutron correlation in these nuclei. We have found deformation-driven halo configuration for 31Ne and neighboring nuclei for the first time. (3) We have found evidence of the tetra-neutron state by the double charge exchange reaction. We have successfully measured precisely the mass of 26O, which was found barely unbound with respect to two-neutron emission. We have also successfully measured 28O for the first time. The nuclear interactions and many-body effects clarified by these experiments may shed light on the properties of neutron stars.
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