Photodisintegration of deuterium by linearly polarized gamma rays

• Project/Area Number: 16340080
• 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: KONAN UNIVERSITY
• Principal Investigator: UTSUNOMIYA Hiroaki KONAN UNIVERSITY, DEPARTMENT OF PHYSICS, PROFESSOR, 理工学部, 教授 (00241167)
• Co-Investigator(Kenkyū-buntansha): AKIMUNE Hidetoshi KONAN UNIVERSITY, DEPARTMENT OF PHYSICS, ASSOCIATE PROFESSOR, 理工学部, 助教授 (60319829) ; TOYOKAWA Hiroyuki NATIONAL INSTUTUTE OF ADVANCED INDUSTRIAL SCIEINCE AND TECHNOLOGY, RESEARCH INSTITUTE OF INSTRUMENTATION FRONTIER, RESEARCHER, 計測フロンティア研究部門, 研究員 (80357582) ; HARANO Hideki NATIONAL INSTUTUTE OF ADVANCED INDUSTRIAL SCIEINCE AND TECHNOLOGY, NATIONAL METROLOGY INSTITUTE OF JAPAN, RESEARCHER, 計測標準研究部門, 研究員 (60302775) ; MATSUMOTO Tetsuro NATIONAL INSTUTUTE OF ADVANCED INDUSTRIAL SCIEINCE AND TECHNOLOGY, NATIONAL METROLOGY INSTITUTE OF JAPAN, RESEARCHER, 計測標準研究部門, 研究員 (70415793) ; 芳原 新也 甲南大学, 理工学部, 科研研究員
• Project Period (FY): 2004 – 2006
• Project Status: Completed (Fiscal Year 2006)
• Budget Amount: ¥12,900,000 (Direct Cost: ¥12,900,000); Fiscal Year 2006: ¥1,800,000 (Direct Cost: ¥1,800,000); Fiscal Year 2005: ¥6,200,000 (Direct Cost: ¥6,200,000); Fiscal Year 2004: ¥4,900,000 (Direct Cost: ¥4,900,000)
• Keywords: experimental nuclear physics / linearly polarized photons / photodisintegration of deuterium / photonuclear reactions / big bang nucleosynthesis / 直線偏光γ線源 / 光核反応 / 核合成 / 宇宙核物理 / レーザー逆コンプトンガンマ線 / 放射光施設 / 重陽子 / 直線偏光ガンマ線 / 中性子角度分布 / E1 M1 / ビッグバン元素合成 / レーザー逆コンプトン散乱 / 産業技術総合研究所

Research Abstract

Linearly polarized γ rays were produced in the inverse Compton scattering of linearly polarized photons from a Nd : YVO_4 laser with relativistic electrons in the storage ring TERAS at the National Institute of Advanced Industrial Science and Technology. An encapsulated deuterated liquid scintillator (BICRON BC-537) was irradiated with polarized γ ray beams at 2.5 and 3.0 MeV. The target scintillator served as an active target. Four neutron detectors, each consisting of five ^3He proportional counters embedded in a polyethylene were mounted at 90° with respect to the y-ray beam; a pair of neutron detectors was mounted parallel to the electric field of the linearly polarized γ rays and the other pair was mounted perpendicular to the electric field. Anisotopic neutron emissions were observed in the photodisintegration of deuterium. The ratio of M1 and E1 components in photodisintegration of deuterium was determined from the anisotropy. Cross talks of neutron events between the detectors were simulated with a Monte Carlo code MCNP. The cross-talk effect was taken into account in the data analysis. It was found that the ratio is consistent with theoretical predictions at both energies. We will perform a systematic measurement of the M1 and E1 photodisintegration of deuterium in the energy region of direct relevance to big bang nucleosynthesis.

Research Products

• [Journal Article] Photonuclear cross sections of astrophysical significance (2007)
  • Author(s): H.Utsunomiya
  • Journal Title: Proc.of Int.Symp. (Tours Symposium on Nuclear Physics VI), AIP Conference Proceedings (New York : AIP) 891 Pages: 329-338
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Photonuclear cross sections of astrophysical significance (2007)
  • Author(s): H.Utsunomiya
  • Journal Title: AIP Conference Proceedings 891 Pages: 329-329
• [Journal Article] Photodisintegration of 80Se and its implications for s-process branching (2007)
  • Author(s): A.Makinaga, H.Utsunomiya, H.Akimune, H.Toyokawa 他8名
  • Journal Title: AIP Conference Proceedings 891 891 Pages: 431-431
• [Journal Article] Direct determination of photodisintegration cross sections and the p-process (2006)
  • Author(s): H.Utsunomiya, P.Mohr, A.Zilges, M.Rayet
  • Journal Title: Nucl. Phys. A777 Pages: 459-459
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Partial Photoneutron Cross Sections for the Isomeric State ^<180>Ta^m (2006)
  • Author(s): S.Goko, H.Utsunomiya, S.Goriely, A.Makinaga, T.Kaihori, S.Hohara, H.Akimune, T.Yamagata
  • Journal Title: Phys. Rev. Lett. 96 Pages: 192501-192501
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Photoneutron cross section measurements on the N-82 nuclei ^<139>La and ^<141>Pr : Implications for p-process nucleosynthesis (2006)
  • Author(s): H.Utsunomiya, A.Makinaga, S.Goko, T.Kaihori, H.Akimune, T.Yamagata, M.Ohta, H.Toyokawa, S.Muller, Y.-W.Lui, S.Goriely
  • Journal Title: Phys. Rev. C 74 Pages: 25806-1
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Direct determination of photodisintegration cross sections and the p-process (2006)
  • Author(s): H.Utsunomiya, P.Mohr, A.Zilges, M.Rayet
  • Journal Title: Nucl.Phys. A777 Pages: 459-478
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Partial Photoneutron Cross Sections for the Isomeric State ^<180>Ta^m (2006)
  • Author(s): S.Goko, H.Utsunomiya, S.Goriely, A.Makinaga, T.Kaihori, S.Hohara, H.Akimune, T.Yamagata, Y.-W.Lui, H.Toyokawa, A.J.Koning, S.Hilaire
  • Journal Title: Phys.Rev.Lett. 96
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Photoneutron cross section measurements on the N-82 nuclei ^<139>La and ^<141>Pr : Implications for p-process nucleosynthesis (2006)
  • Author(s): H.Utsunomiya, A.Makinaga, S.Goko, T.Kaihori, H.Akimune, T.Yamagata, M.Ohta, H.Toyokawa, S.Muller, Y.-W.Lui, S.Goriely
  • Journal Title: Phys.Rev. C74
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Photonuclear Reactions in Astrophysics (2006)
  • Author(s): H.Utsunomiya
  • Journal Title: Nuclear Physics Trends, Proc. 6^<th> China-Japan Joint Nuclear Physics Symposium, AIP Proceedings 865 Pages: 208-214
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Direct determination of photodisintegration cross sections and the p-process (2006)
  • Author(s): H.Utsunomiya 他3名
  • Journal Title: Nuclear Physics A777 Pages: 459-459
• [Journal Article] Partial Photoneutron Cross Sections for the Isomeric State ^<180>Ta (2006)
  • Author(s): S.Goko, H.Utsunomiya, H.Akimune, H.Toyokawa 他8名
  • Journal Title: Physical Review Letters 96 Pages: 192501-192501
• [Journal Article] Photoneutron cross section measurements on the N-82 nuclei ^<139>La and ^<141>Pr : Implications for p-process nucleosynthesis (2006)
  • Author(s): H.Utsunomiya, H.Akimune, H.Toyokawa 他8名
  • Journal Title: Physical Review C Pages: 25806-25806
• [Journal Article] Photonuclear Reactions in Astrophysics (2006)
  • Author(s): H.Utsunomiya
  • Journal Title: AIP Proceedings 865 Pages: 208-208
• [Journal Article] Ten-tesla superconducting wiggler at SPring-8 as a photon source for nuclear astrophysics (2005)
  • Author(s): H.Utsunomiya, S.Goko, K.Soutome, N.Kumagai, H.Yonehara
  • Journal Title: Nucl. Instr. Meth. Phys. Res. A548 Pages: 225-225
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Photodisintegration cross section measurements on ^<186>W, ^<187>Re, and ^<188>Os; Implications for the Re-Os cosmochronology (2005)
  • Author(s): T.Shizuma, H.Utsunomiya, P.Mohr, T.Hayakawa, S.Goko, A.Makinaga, H.Akimune, T.Yamagata, M.Ohta, H.Ohgaki, Y.-W.Lui, H.Toyokawa, A.Uritani, S.Goriely
  • Journal Title: Phys. Rev. 72 Pages: 25808-25808
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Ten-tesla superconducting wiggler at SPring-8 as a photon source for nuclear astrophysics (2005)
  • Author(s): H.Utsunomiya, S.Goko, K.Soutome, N.Kumagai, H.Yonehara
  • Journal Title: Nucl.Instr.Meth.Phys.Res. A538 Pages: 225-233
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Photodisintegration cross section measurements on ^<186>W, ^<187>Re, and ^<188>Os ; Implications for the Re-Os cosmochronology (2005)
  • Author(s): T.Shizuma, H.Utsunomiya, P.Mohr, T.Hayakawa, S.Goko, A.Makinaga, H.Akimune, T.Yamagata, M.Ohta, H.Ohgaki, Y.-W.Lui, H.Toyokawa, A.Uritani, S.Goriely
  • Journal Title: Phys.Rev. C72 Pages: 25808-25808
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Photonuclear reaction studies at synchrotron radiation facilities in Japan (2004)
  • Author(s): H.Utsunomiya, K.Y.Hara, S.Goko, H.Akimune, T.Yamagata, M.Ohta, H.Ohgaki, H.Toyokawa, T.Hayakawa, T.Shizuma, P.Mohr, Y.-W.Lui, H.Ohkuma, H.Yonehara, K.Soutome, M.Arnould
  • Journal Title: Nucl. Phys. A738 Pages: 136-136
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] s-process branching at ^<185>W revised (2004)
  • Author(s): P.Mohr, T.Shizuma, H.Ueda, S.Goko, Makinaga, K., Y.Hara, T.Hayakawa, Y.-W.Lui, H.Ohgaki, H.Utsunomiya
  • Journal Title: Phys. Rev. C69
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Photonuclear reaction studies at synchrotron radiation facilities in Japan (2004)
  • Author(s): H.Utsunomiya, K.Y.Hara, S.Goko, H.Akimune, T.Yamagata, M.Ohta, H.Ohgaki, H.Toyokawa, T.Hayakawa, T.Shizuma, P.Mohr, Y.-W.Lui, H.Ohkuma, H.Yonehara, K.Soutome, M.Arnould
  • Journal Title: Nucl.Phys. A738 Pages: 136-142
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] s-process branching at ^<185>W revised (2004)
  • Author(s): P.Mohr, T.Shizuma, H.Ueda, S.Goko, A.Makinaga, K.Y.Hara, T.Hayakawa, Y.-W.Lui, H.Ohgaki, H.Utsunomiya
  • Journal Title: Phys.Rev. C69
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Photoreaction Cross Section Measurements for Astrophysics (2004)
  • Author(s): H.Utsunomiya, S.Goko, K.Y.Hara, H.Akimune, T.Yamagata, M.Ohta, H.Ohgaki, H.Toyokawa, T.Hayakawa, T.Shizuma, Y.-W.Lui, P.Mohr
  • Journal Title: Proc.of Int.Symp. (Tours Symposium on Nuclear Physics VI), AIP Conf.Proc. (New York : AIP) 704 Pages: 439-446
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] New Generation of Photonuclear Reaction Studies for Astronuclear Physics (2004)
  • Author(s): H.Utsunomiya
  • Journal Title: EAS Publication Series 11 Pages: 235-237
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Measurement of Photo-Desctruction Cross Sections for ^<180>Ta at SPring-8 (2004)
  • Author(s): S.Goko, H.Utsunomiya
  • Journal Title: Proc.of Int.Symp. (Tours Symposium on Nuclear Physics VI), AIP Conf.Proc. (New York : AIP) 704 Pages: 546-550
  • Description: 「研究成果報告書概要(欧文)」より
• [Book] Tours Symposium on Nuclear Physics VI (ISBN 978-0-7354-0395-6) (2006)
  • Author(s): H.Akimune, H.Utsunomiya 他6名
  • Total Pages: 464
  • Publisher: American Institute of Physics