New Isomer in La-138 for supernova neutrino process

• Project/Area Number: 18340071
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Japan Atomic Energy Agency
• Principal Investigator: HAYAKAWA Takehito Japan Atomic Energy Agency, 量子ビーム応用研究部門, 研究主幹 (70343944)
• Co-Investigator(Kenkyū-buntansha): SHIZUMA Toshiyuki 日本原子力研究開発機構, 量子ビーム応用研究部門, 研究副主幹 (50282299) ; KOMATSUBARA Tetsurou 筑波大学, 数理物質科学研究科, 講師 (10195852) ; FUJIWARA Mamoru 大阪大学, 核物理学研究センター, 助教授 (00030031) ; NAKADA Hitoshi 千葉大学, 理学部, 助教授 (80221448) ; CHIBA Chiba 日本原子力研究開発機構, 先端基礎科学研究センター, 研究主幹 (60354883) ; KAJINO Toshitaka 国立天文台, 理論研究部, 助教授 (20169444)
• Project Period (FY): 2006 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥10,120,000 (Direct Cost: ¥8,500,000、Indirect Cost: ¥1,620,000); Fiscal Year 2008: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2007: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000); Fiscal Year 2006: ¥3,100,000 (Direct Cost: ¥3,100,000)
• Keywords: 原子核(実験) / ニュートリノ元素合成 / 原子核宇宙時計 / p核 / 超新星元素合成 / スケーリング則 / 光核反応 / 超新星爆発 / 逆コンプトンγ線 / ニュートリノ / 逆コンプトンガンマ線

Research Abstract

鉄より重い元素の約99%は中性子捕獲反応で生成されたが、中性子捕獲反応では生成できない35 核種のp核と呼ばれる同位体が存在している。La-138を含むp核の天体起源を、レーザーコンプトン散乱γ線、中性子等の量子ビームを用いた原子核実験と、理論研究によってすすめる。

Research Products

• [Journal Article] Reply to "Comment on '138La-138Ce-136Ce nuclear cosmochronometer for supernova neutrino process'" (2009)
  • Author(s): T.Hayakawa, T.Shizuma, T.Kajino, K.Ogawa, H. Nakada
  • Journal Title: Phys. Rev. C 79 Pages: 59802-59802
• [Journal Article] Several-MeV Gamma-ray generation at NewSUBARU by laser Compton backscattering (2009)
  • Author(s): S.Amano, K.Horikawa, K.Ishihara, S.Miyamoto, T.Hayakawa, T.Shizuma, T.Mochizuki
  • Journal Title: Nucl. Instrum. Method, Phys. Res. A 602 Pages: 337-341
• [Journal Article] Nondestructive Detection of Heavily Shielded Materials by Using Nuclear Resonance Fluorescence with a Laser-Compton Scattering Gamma-ray Source (2009)
  • Author(s): N.Kikuzawa, R.Hajima, N.Nishimori, E.Minehara, T.Hayakawa, T.Shizuma, H.Toyokawa, H.Ohgaki
  • Journal Title: pplied Physics Express 2
• [Journal Article] A 3-quasiparticle isomer in neutron-rich 183Ta (2009)
  • Author(s): T.Shizuma, T.Ishii, H.Makii, T.Hayakawa, M.Matsuda
  • Journal Title: Eur. Phys. J. A 39 Pages: 263-266
• [Journal Article] Nondestructive detection of hidden chemical compounds with laser Compton-scattering gamma rays (2009)
  • Author(s): T. Hayakawa, H. Ohgaki, T. Shizuma, R. Hajima, N. Kikuzawa, E. Minehara, T. Kii, H. Toyokawa
  • Journal Title: REVIEW OF SCIENTIFIC INSTRUMENTS 80 Pages: 45110-45110
  • NAID: 120001642843
• [Journal Article] Proton-induced Nuclear Reactions Using Compact High-Contrast High-Intensity Laser (2009)
  • Author(s): K. Ogura, T. Shizuma, T. Hayakawa, A. Yogo, M. Nishiuchi, S. Orimo, A. Sagisaka, A. Pirozhkov, M. Mori, H. Kiriyama, S. Kanazawa, S. Kondo, Y. Nakai, T. Shimoura, M. Tanoue, A. Akutsu, T. Motomura, H. Okada, T. Kimura, Y. Oishi1, T. Nayuki1, T. Fujii1, K. Nemoto1, H. Daido
  • Journal Title: Applied Physics Express 2 Pages: 66001-66001
  • NAID: 10025086873
• [Journal Article] 138La-138Ce-136Ce nuclear cosmochronometer for supernova neutrino process (2008)
  • Author(s): T.Hayakawa, T.Shizuma, T.Kajino, K.Ogawa, H. Nakada
  • Journal Title: Physical Review C 77
• [Journal Article] Empirical Abundance Scaling laws: its implication for supernova Gamma-process (2008)
  • Author(s): T.Hayakawa, N.Iwamoto, T.Kajino, T.Shizuma, H.Umeda, K.Nomoto
  • Journal Title: Astrophys. J. 685 Pages: 1089-1102
• [Journal Article] Half-life of the 164Ho isomer populated by the (Gamma, n) reaction from laser Compton scattering γ rays at the electron storage ring NewSUBARU (2008)
  • Author(s): T. Hayakawa, T. Shizuma, S. Miyamoto, S. Amano, K. Horikawa, K.Ishihara, M. Mori, K. Kawase, M. Kando, N. Kikuzawa, S. Chiba, T. Mochizuki, T. Kajino, and M. Fujiwara
  • Journal Title: Physical Review C 77
• [Journal Article] Direct and semi-direct capture in low-energy (n,g amma) reactions of neutron-rich tin isotopes and its implications for r-process nucleosynthesis (2008)
  • Author(s): S.Chiba, H.Koura, T.Hayakawa, T.Maruyama, T.Kawano, T.Kajino
  • Journal Title: Phys. Rev. C 77 Pages: 15809-15809
• [Journal Article] Proposal of Nondestructive Assay Using a High-Flux Gamma-Ray Source and Nuclear Resonance Fluorescence (2008)
  • Author(s): R. Hajima, T. Hayakawa, N. Kikuzawa, E. Minehara
  • Journal Title: J. Nucl. Sci. Tech. 45 Pages: 441-451
• [Journal Article] One-quasiparticle bands in neutron-rich 187W (2008)
  • Author(s): T.Shizuma, T.Ishii, H.Makii, T.Hayakawa, M.Matsuda, S.Shigematsu, E.Ideguchi, Y.Zheng, M.Liu, T.Morikawa, M.Oi
  • Journal Title: Phys. Rev. C 77 Pages: 47303-47303
• [Journal Article] Fine structure of the magnetic-dipole-strength distribution in 208Pb (2008)
  • Author(s): .Shizuma, T.Hayakawa, H.Ohgaki, H.Toyokawa, T.Komatsubara, N.Kikuzawa, A.Tamii, H.Nakada
  • Journal Title: Phys. Rev. C 78
• [Journal Article] Sub-MeV tunably polarized X-ray production with laser Thomson Backscattering (2008)
  • Author(s): K.Kawase, M.Kando, T.Hayakawa, I.Daito, S.Kondo, T.Homma, T.Kameshima, H.Kotaki, L.-M.Chen, Y.Fukuda
  • Journal Title: Review of Scientifc Instruments 79 Pages: 3302-3302
• [Journal Article] ^<138>La-^<138>Ce-^<136>Ce nuclear cosmochronometer for supernova neutrino process (2008)
  • Author(s): T. Hayakawa, T. Shizuma, T. Kajno, et al.
  • Journal Title: Physical Review C 77
  • Peer Reviewed
• [Journal Article] Half-life of the ^<164>Ho isomer populated by the (γ, n) reaction from laser Compton scattering γ rays at the electron storage ring NewSUBARU (2008)
  • Author(s): T. Hayakawa, T. Shizuma, S. Miyamoto, et al.
  • Journal Title: Physical Review C 77
  • Peer Reviewed
• [Journal Article] Empirical Abundance Scaling laws : its implication for supernov a Gamma-process (2008)
  • Author(s): T. Hayakawa, N. Iwamoto, T. Kajino, et al.
  • Journal Title: Astrophysical Journal 685 Pages: 1089-1102
  • Peer Reviewed
• [Journal Article] Direct and semi-direct capture in low-energy(n,Y)reactionsof neutron-rich tin isotopes and its implications for r-processnucleosynthesis (2008)
  • Author(s): S. Chiba, H. Koura, T. Hayakawa, T. Maruyama, T. Kawano T. Kajino
  • Journal Title: Phys.Rev.C 77 Pages: 15809-15809
  • Peer Reviewed
• [Journal Article] Evidence for a Kπ = 1/2+ isomer in neutron-rich 185Ta (2007)
  • Author(s): T.Shizuma, T.Ishii, H.Makii, T.Hayakawa, S.Shigematsu, M.Matsuda, E.Ideguchi, Y.Zheng, M.Liu, T.Morikawa
  • Journal Title: Eur. Phys. J. A 34 Pages: 1-1
• [Journal Article] Principle of universality of gamma-process nucleosynthesis in core-collapse supernova explosions (2006)
  • Author(s): T.Hayakawa, N.Iwamoto, T.Kajino, T.Shizuma, H.Umeda, K.Nomoto
  • Journal Title: Astrophysical Journal 648-1, Part2
• [Journal Article] Excited states in neutron-rich W produced by an induced neutron transfer reaction (2006)
  • Author(s): T.Shizuma, T.Ishii, H.Makii, T.Hayakawa, S.Shigematsu, M.Matsuda, E.Ideguchi, Y. Zheng, M. Liu, T.Morikawa, P.M. Walker, M. Ohi
  • Journal Title: European Physical Journal A 30-2 Pages: 391-396
• [Journal Article] Evidence for p-process nucleosynthesis recorded at the Solar System abundances (2006)
  • Author(s): T.Hayakawa, N.Iwamoto, T.Shizuma, T.Kajino, H.Umeda, K.Nomoto
  • Journal Title: Eur. Phys. J. A 27, Supplement 1 Pages: 123-123
• [Journal Article] Principle of Universality of ν -Process Nucleosynthesis in core-collapse supernova (2006)
  • Author(s): T.Hayakawa
  • Journal Title: The Astrohpysical Journal 648
• [Journal Article] Evidence for p-process nucleosynthesis recorded at the Solar System abundances (2006)
  • Author(s): T.Hayakawa
  • Journal Title: The European Physical Journal A 27 Pages: 123-128
• [Journal Article] Half-life of ^<184>Repopulated by the (ν, n) reaction from laser Compton scattering ν rays at the electron storage ring NewSUBARU (2006)
  • Author(s): T.Hayakawa
  • Journal Title: The Physical Review C 74
• [Journal Article] Half-life of Re populated by the reaction from laser Compton scattering rays at the electron storage ring NewSUBARU
  • Author(s): T.Hayakawa, S.Miyamoto, Y.Hayashi, K.Kawase, K.Horikawa, S.Chiba, H.Nakanishi, S.Hashimoto, T.Ohta, M.Kando, T.Motsizuki, T.Kajino, M.Fujiwara
  • Journal Title: Physical Review C 74-6
• [Journal Article]
• [Presentation] p核の天体起源の探究 (2009)
  • Author(s): 早川岳人, 他
  • Organizer: 2009春の物理学会
  • Place of Presentation: 立教大学
  • Year and Date: 2009-03-30
• [Presentation] p核の天体起源の探究 (2009)
  • Author(s): 早川岳人、岩本信之、梶野敏貴、静間俊行、梅田秀之、野本憲一
  • Organizer: 日本物理学会
  • Place of Presentation: 東京
• [Presentation] NewSUBARUの逆コンプトンガンマ線によるHo-164の光核反応による生成と崩壊測定 (2008)
  • Author(s): 早川岳人、静間俊行、宮本修治、天野壮、堀川賢、石原一樹、森道昭、川瀬啓悟、神門正城、菊澤信宏、望月孝晏、梶野敏貴、藤原守
  • Organizer: 日本物理学会
  • Place of Presentation: 大阪市
• [Presentation] s過程研究のためのCd-113アイソマーへの熱中性子捕獲反応断面積測定 (2008)
  • Author(s): 早川岳人、静間俊行、千葉敏、梶野敏貴、初川雄一、岩本信之、篠原伸夫、原田秀郎
  • Organizer: 日本物理学会
  • Place of Presentation: 山形市
• [Presentation] Half-life of 184Re populated by photodisintegration reaction with Laser Compton scattering gammar-rays NewSUBARU (2007)
  • Author(s): T. Hayakawa
  • Organizer: International Conference in Nuclear Data for Science and Technology 2007
  • Place of Presentation: Nice
  • Year and Date: 2007-04-27
• [Presentation] ニュースバルの逆コンプトンガンマ線によるReの光核反応 (2007)
  • Author(s): 早川岳人、宮本修治、林由紀雄、川瀬啓悟、堀川賢、千葉敏、中西康介、橋本尚信、太田岳史、神門正城、梶野敏貴、藤原守
  • Organizer: 日本物理学会
  • Place of Presentation: 八王子市
• [Presentation] 超新星爆発の光核反応の元素合成過程 (2007)
  • Author(s): 早川岳人、岩本信之、梶野敏貴、静間俊行、梅田秀之、野本憲一
  • Organizer: 日本物理学会
  • Place of Presentation: 札幌市
• [Presentation] 超新星爆発におけるニュートリノ過程の原子核宇宙時計の提唱 (2006)
  • Author(s): 早川岳人、静間俊行、梶野敏貴、小川建吾、中田仁
  • Organizer: 日本物理学会2006秋の大会
  • Place of Presentation: 奈良市