Elucidation of the rare-earth element peak around A = 160 in the r-process nucleosynthesis
Project/Area Number |
24740188
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Multi-year Fund |
Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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Research Institution | The Institute of Physical and Chemical Research |
Principal Investigator |
WATANABE Hiroshi 独立行政法人理化学研究所, 仁科加速器研究センター, 客員研究員 (60333316)
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Project Period (FY) |
2012-04-01 – 2015-03-31
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Project Status |
Completed (Fiscal Year 2014)
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Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2012: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
|
Keywords | 国際共同研究 / 元素合成 / 中性子過剰核 / ベータ崩壊 / 半減期 / 核異性体 / RIビームファクトリー / アイソマー / 加速器 |
Outline of Final Research Achievements |
Nearly half of elements heavier than iron in the universe are considered to be synthesized via a rapid-neutron capture (r) process, which takes place in explosive astrophysical sites like supernovae and/or neutron-star mergers. In the present work, we have measured beta-decay half-lives, decay schemes, and isomeric states in a wide range of neutron-rich isotopes relevant to the r-process nucleosynthesis, particularly focusing on deformed nuclei around mass 160 which should affect the formation of the so-called rare-earth element peak. Those spectroscopic information, in combination with the new data obtained as well for neutron-rich isotopes in the vicinity of the doubly-magic nuclei 78Ni and 132Sn, are expected to serve for improvement of the astrophysical simulations of r-process.
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Report
(4 results)
Research Products
(25 results)
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[Journal Article] Monopole-Driven Shell Evolution below the Doubly Magic Nucleus 132Sn Explored with the Long-Lived Isomer in 126Pd2014
Author(s)
H. Watanabe, G. Lorusso, S. Nishimura, T. Otsuka, K. Ogawa, Z.Y. Xu, T. Sumikama, P.-A. Soderstrom, P. Doornenbal, Z. Li, F. Browne, G. Gey, H.S. Jung, J. Taprogge, Zs. Vajta, J. Wu, A. Yagi, H. Baba, G. Benzoni, H. Nishibata 他
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Journal Title
Phys. Rev. Lett.
Volume: 113
Issue: 4
Pages: 042502-042502
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] β-Decay Half-Lives of 76, 77Co, 79, 80Ni and 81Cu Experimental Indication of a Doubly Magic 78Ni2014
Author(s)
Z.Y. Xu, S. Nishimura, G. Lorusso, F. Browne, P. Doornenbal, G. Gey, H.-S. Jung, Z. Li, M. Niikura, P.-A. Soderstrom, T. Sumikama, J. Taprogge, Zs. Vajta, H. Watanabe, J. Wu, A. Yagi, K. Yoshinaga, H. Baba, S. Franchoo, H. Nishibata 他
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Journal Title
Phys. Rev. Lett.
Volume: 113
Issue: 3
Pages: 032505-032505
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] 1p3/2 Proton-Hole State in 132Sn and the Shell Structure Along N= 822014
Author(s)
J. Taprogge, A. Jungclaus, H. Grawe, S. Nishimura, P. Doornenbal, G. Lorusso, G.S. Simpson, P.-A. Soderstrom, T. Sumikama, Z.Y. Xu, H. Baba, F. Browne, N. Fukuda, R. Gernhauser, G. Gey, N. Inabe, T. Isobe, H.S. Jung, D. Kameda, H. Nishibata 他
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Journal Title
Phys. Rev. Lett.
Volume: 112
Issue: 13
Pages: 132501-132501
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] Identification of a millisecond isomeric state in 129Cd81 via the detection of internal conversion and Compton electrons2014
Author(s)
J. Taprogge, A. Jungclaus, H. Grawe, S. Nishimura, Z.Y. Xu, P. Doornenbal, G. Lorusso, E. Nacher, G.S. Simpson, P.-A. Soderstrom, T. Sumikama, H. Baba, F. Browne, N. Fukuda, R. Gernhauser, G. Gey, N. Inabe, T. Isobe, H.S. Jung, H. Nishibata 他
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Journal Title
Phys. Lett. B
Volume: 738
Pages: 223-227
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] Yrast 6+ Seniority Isomers of 136, 138Sn2014
Author(s)
G.S. Simpson, G. Gey, A. Jungclaus, J. Taprogge, S. Nishimura, K. Sieja, P. Doornenbal, G. Lorusso, P.-A. Soderstrom, T. Sumikama, Z.Y. Xu, H. Baba, F. Browne, N. Fukuda, N. Inabe, T. Isobe, H.S. Jung, D. Kameda, G.D. Kim, H. Nishibata 他
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Journal Title
Phys. Rev. Lett.
Volume: 113
Issue: 13
Pages: 132502-132502
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] Isomer Decay Spectroscopy of 164Sm and 166Gd: Midshell Collectivity Around N=1002014
Author(s)
Z. Patel, P.-A. Soderstrom, Zs. Podolyak, P.H. Regan, P.M. Walker, H. Watanabe, E. Ideguchi, G.S. Simpson, H.L. Liu, S. Nishimura, Q. Wu, F.R. Xu, F. Browne, P. Doornenbal, G. Lorusso, S. Rice, L. Sinclair, T. Sumikama, J. Wu, H. Nishibata 他
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Journal Title
Phys. Rev. Lett.
Volume: 113
Issue: 26
Pages: 262502-262502
DOI
Related Report
Peer Reviewed
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[Journal Article] Spectroscopy of 135La2013
Author(s)
R. Leguillon, H. Nishibata, Y. Ito, C.M. Petrache, H. Watanabe, et al.
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Journal Title
Physical Review C
Volume: 88
Issue: 4
Pages: 44309-44309
DOI
Related Report
Peer Reviewed
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[Journal Article] Novel method for the production of spin-aligned RI beams in projectile fragmentation reaction with the dispersion matching technique2013
Author(s)
Y. Ichikawa, H. Ueno, Y. Ishii, T. Furukawa, A. Yoshimi, D. Kameda, H. Watanabe, N. Aoi, K. Asahi, D. L. Balabanski, R. Chevrier, J. M. Daugas, N. Fukuda, G. Georgiev, H. Hayashi, H. Iijima, N. Inabe, T. Inoue, M. Ishihara, T. Kubo, T. Nanao, T. Ohnishi, K. Suzuki, M. Tsuchiya, H. Takeda, M. M. Rajabali
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Journal Title
Hyperfine Interactions
Volume: 220
Issue: 1-3
Pages: 47-51
DOI
Related Report
Peer Reviewed
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