Production of isomeric Al-26 beam and creation mechanism of galactic gamma rays

• Project/Area Number: 16K05369
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: The University of Tokyo
• Principal Investigator: Yamaguchi Hidetoshi 東京大学, 大学院理学系研究科, 講師 (30376529)
• Co-Investigator(Kenkyū-buntansha): 早川 勢也 東京大学, 大学院理学系研究科(理学部), 特任助教 (00747743)
• Project Period (FY): 2016-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2016: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: 宇宙核物理 / 不安定核 / 宇宙ガンマ線 / 天体核反応 / 核異性体 / 水素燃焼 / RIビーム

Outline of Final Research Achievements

The 1.8-MeV gamma-rays coming from the center of our galaxy originate from the decay of aluminum-26 nuclei. However, it is still uncertain which stellar sites are responsible for their production, because aluminum-26 has a ground state and an isomeric state and the production/destruction processes are not precisely known.
In this study, isomeric aluminum-26 nuclei, which had been difficult to use in experiments, were produced as a low-energy ion beam. The isomeric beam was applied for a measurement based on the method of proton resonant scattering, and several resonances are discovered. With the observed parameters of these resonances, we will be able to evaluate the destruction reaction of aluminum-26 isomer.

Academic Significance and Societal Importance of the Research Achievements

銀河からのAl-26由来ガンマ線観測は、銀河の中で今まさにどのような元素合成が行われているか、またドップラーシフトによって銀河がどのように運動しているかを理解するための有益な情報である。ところが、現在の観測による銀河のアルミニウム-26の生成量と、各種天体のシミュレーションによる生成量の総計には、大きな食い違いがある。本研究により、Al-26のアイソマービームを生成し、その破壊反応に関する直接的情報が初めて得られた。今後食い違いの解消と銀河の精密な理解に結びつくと期待できる。
また、本研究で確立したアイソマービーム生成技術は、将来工学的応用が可能な技術と考えられる。

Research Products

• [Int'l Joint Research] 成均館大学/梨花女子大学(韓国)
• [Int'l Joint Research] CIAE/Institute of Modern Physics/Beijing Normal Univ.(中国)
• [Int'l Joint Research] University of Edinburgh(英国)
• [Int'l Joint Research] INFN/University of Catania(イタリア)
• [Int'l Joint Research] McMaster Univ.(カナダ)
• [Int'l Joint Research] 成均館大学/IBS/梨花女子大学(韓国)
• [Int'l Joint Research] 北航大学/CIAE/Institute of Modern Physics(中国)
• [Int'l Joint Research] University of Edinburgh(英国)
• [Int'l Joint Research] INFN(イタリア)
• [Int'l Joint Research] 成均館大学/IBS/梨花女子大学(韓国)
• [Int'l Joint Research] Beihang大学/CIAE(中国)
• [Int'l Joint Research] University of Edinburgh(英国)
• [Int'l Joint Research] INFN/University of Naples(イタリア)
• [Journal Article] Beam production of ? 18 Ne with in-flight method for alpha scattering at CRIB (2018)
  • Author(s): Duy N.N.、Chae K.Y.、Cha S.M.、Yamaguchi H.、Abe K.、Bae S.H.、Binh D.N.、Choi S.H.、Hahn K.I.、Hayakawa S.、Hong B.、Iwasa N.、Kahl D.、et al.
  • Journal Title: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment Volume: 897 Pages: 8-13
  • DOI: 10.1016/j.nima.2018.04.043
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Impact of the 26mAl(p, γ) reaction to galactic 26Al yield (2018)
  • Author(s): Kahl D.、Shimizu H.、Yamaguchi H.、Abe K.、Beliuskina O.、Cha S. M.、Chae K. Y.、Chen A. A.、Ge Z.、Hayakawa S.、Imai N.、Iwasa N.、Kim A.、Kim D. H.、Kim M. J.、Kubono S.、Kwag M. S.、Liang J.、Moon J. Y.、Nishimura S.、Oka S.、Park S. Y.、Psaltis A.、Teranishi T.、Ueno Y.、Yang L.
  • Journal Title: AIP Conference Proceedings Volume: 1947 Pages: 020003-020003
  • DOI: 10.1063/1.5030807
  • Peer Reviewed
• [Journal Article] Indirect studies on astrophysical reactions at the low-energy RI beam separator CRIB (2018)
  • Author(s): Yamaguchi H.、Kahl D.、Hayakawa S.、Yang L.、Shimizu H.、Sakaguchi Y.、Abe K.、Wakabayashi Y.、Hashimoto et al.
  • Journal Title: AIP Conference Proceedings Volume: 1947 Pages: 020022-020022
  • DOI: 10.1063/1.5030826
  • Peer Reviewed
• [Journal Article] Measurements of the neutron-induced reactions on 7Be with CRIB by the Trojan Horse method (2018)
  • Author(s): Hayakawa S.、Abe K.、Beliuskina O.、Cha S. M.、Chae K. Y.、Cherubini S.、Figuera P.、Ge Z.、Gulino M.、Hu J.、Inoue A.、et al.
  • Journal Title: AIP Conference Proceedings Volume: 1947 Pages: 020011-020011
  • DOI: 10.1063/1.5030815
  • Peer Reviewed
• [Journal Article] Direct measurements and detection techniques with low-energy RIBs (2018)
  • Author(s): Yamaguchi H.、Hayakawa S.、Yang L.、Shimizu H.、Kahl D.
  • Journal Title: EPJ Web of Conferences Volume: 184 Pages: 01017-01017
  • DOI: 10.1051/epjconf/201818401017
• [Journal Article] Isomeric 26Al beam production with CRIB (2018)
  • Author(s): Shimizu H.、Kahl D.、Yamaguchi H.、Abe K.、Beliuskina O.、Cha S. M.、Chae K. Y.、Chen A. A.、Ge Z.、Hayakawa S.、Imai N.、Iwasa N.、Kim A.、Kim D. H.、Kim M. J.、Kubono S.、Kawag M. S.、Liang J.、Moon J. Y.、Nishimura S.、Oka S.、Park S. Y.、Psaltis A.、Teranishi T.、Ueno Y.、Yang L.
  • Journal Title: EPJ Web of Conferences Volume: 184 Pages: 02013-02013
  • DOI: 10.1051/epjconf/201818402013
• [Journal Article] First measurement of 30S + α resonant elastic scattering for the 30S(α, p) reaction rate (2018)
  • Author(s): D. Kahl,H. Yamaguchi, S. Kubono, A.A. Chen, A. Parikh, D.N. Binh, J. Chen, S. Cherubini, N. N. Duy, T. Hashimoto S. Hayakawa, N. Iwasa H. S. Jung, S. Kato,Y. K. Kwon S. Nishimura, S. Ota, K. Setoodehnia, T. Teranishi, H. Tokieda, T. Yamada, C. C. Yun and L. Y. Zhang,
  • Journal Title: Phys. Rev. C Volume: 97 Issue: 1 Pages: 015802-015802
  • DOI: 10.1103/physrevc.97.015802
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Experimental Studies of Light-Ion Nuclear Reactions Using Low-Energy RI Beams (2017)
  • Author(s): H. Yamaguchi, D. Kahl, S. Hayakawa, Y. Sakaguchi, K. Abe, H. Shimuzu, Y. Wakabayashi, T. Hashimoto, S. Cherubini, M. Gulino, C. Spitaleri, G. G. Rapisarda, M. La Cognata, L. Lamia, S. Romano, S. Kubono, N. Iwasa, T. Teranishi, T. Kawabata, Y. K. Kwon, D. N. Binh, L. H. Khiem, N. N. Duy, S. Kato, T. Komatsubara, et al.
  • Journal Title: JPS Conf. Proc. Volume: 14
  • DOI: 10.7566/jpscp.14.010503
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] 30S(α, p) Thermonuclear Reaction Rate from Experimental Level Structure of 34Ar (2017)
  • Author(s): D. Kahl, A. A. Chen, S. Kubono, H. Yamaguchi, D. N. Binh, J. Chen, S. Cherubini, N. N. Duy, T. Hashimoto, S. Hayakawa, N. Iwasa, H. S. Jung, S. Kato, Y. K. Kwon, S. Nishimura, S. Ota, K. Setoodehnia, T. Teranishi, H. Tokieda, T. Yamada, C. C. Yun, and L. Y. Zhang,
  • Journal Title: JPS Conf. Proc. Volume: 14
  • DOI: 10.7566/jpscp.14.020510
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Study on α-cluster levels in non-4n nuclei using low-energy RI beams (2017)
  • Author(s): H Yamaguchi, D Kahl, S Hayakawa, Y Sakaguchi, K Abe, T Nakao, T Suhara, N Iwasa, A Kim, D H Kim, S M Cha, M S Kwag, J H Lee, E J Lee, K Y Chae, Y Wakabayashi, N Imai, N Kitamura, P Lee, J Y Moon, K B Lee, C Akers, H S Jung, N N Duy, L H Khiem and C S Lee,
  • Journal Title: Journal of Physics: Conference Series Volume: 863 Pages: 012025-012025
  • DOI: 10.1088/1742-6596/863/1/012025
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Isomer beam elastic scattering: 26mAl(p, p) for astrophysics (2017)
  • Author(s): D. Kahl, H. Shimizu, H. Yamaguchi, K. Abe, O. Beliuskina, S. M. Cha, K. Y. Chae, A. A. Chen, Z. Ge, S. Hayakawa, N. Imai, N. Iwasa, A. Kim, D. H. Kim, M. J. Kim, S. Kubono, M. S. Kwag, J. Liang, J. Y. Moon, S. Nishimura, S. Oka, S. Y. Park, A. Psaltis, T. Teranishi, Y. Ueno and L. Yang
  • Journal Title: EPJ Web Conf. Volume: 165
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Nuclear astrophysics projects at the low-energy RI beam separator CRIB (2017)
  • Author(s): H. Yamaguchi, D. Kahl, S. Hayakawa, L. Yang, H. Shimizu, Y. Sakaguchi, K. Abe, T. Nakao, T. Suhara, N. Iwasa, A. Kim, D.H. Kim, S.M. Cha, M.S. Kwag, J.H. Lee, E.J. Lee, K.Y. Chae, Y. Wakabayashi, et al.
  • Journal Title: EPJ Web Conf. Volume: 165
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Experimental investigation of linear-chain structured nucleus in 14C (2017)
  • Author(s): H. Yamaguchi, D. Kahl, S. Hayakawa, Y. Sakaguchi, K. Abe, T. Nakao, T. Suhara, N. Iwasa, A. Kim, D.H. Kim, et al.
  • Journal Title: Phys. Lett. B Volume: 766 Pages: 11-16
  • DOI: 10.1016/j.physletb.2016.12.050
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Studying astrophysical reactions with low-energy RI beams at CRIB (2016)
  • Author(s): H. Yamaguchi, D. Kahl, S. Hayakawa, Y. Sakaguchi, Y. Wakabayashi, T. Hashimoto, S. Cherubini, M. Gulino, C. Spitaleri, G.G. Rapisarda, et al.
  • Journal Title: EPJ Web of Conferences Volume: 117 Pages: 09005-09005
  • DOI: 10.1051/epjconf/201611709005
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Overview of the activities at the low-energy beam separator CRIB (2016)
  • Author(s): H. Yamaguchi, D. Kahl, S. Hayakawa, L. Yang, Y. Sakaguchi, K. Abe, H. Shimizu, and CRIB Collaboration
  • Journal Title: Il Nuovo Cimento Volume: 39C
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Explosive destruction of 26Al (2016)
  • Author(s): D. Kahl, H. Yamaguchi, H. Shimizu, K. Abe, O. Beliuskina, S. M. Cha, K.Y. Chae, Z. Ge, S. Hayakawa, M.S. Kwag, D. H. Kim, J. Y. Moon, S.Y. Park, L. Yang
  • Journal Title: Il Nuovo Cimento Volume: 39C
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] First direct measurement of the 11C(α, p)14N stellar reaction by an extended thick-target method (2016)
  • Author(s): S. Hayakawa, S, Kubono, H. Yamaguchi, T. Teranishi et al.
  • Journal Title: Phys. Rev. C Volume: 93 Issue: 6
  • DOI: 10.1103/physrevc.93.065802
  • Peer Reviewed / Int'l Joint Research
• [Presentation] Study on cluster states in unstable nuclei with alpha-resonant scattering (2019)
  • Author(s): H. Yamaguchi
  • Organizer: RIBF Nuclear Physics Seminar
• [Presentation] Study on explosive nuclear synthesis with low-energy RI beams at CRIB' (2018)
  • Author(s): H. Yamaguchi
  • Organizer: 15th International Symposium on Nuclei in the Cosmos
  • Int'l Joint Research
• [Presentation] Activities at the low-energy RI beam separator CRIB (2018)
  • Author(s): H. Yamaguchi
  • Organizer: RIBF Users Meeting 2018
  • Int'l Joint Research
• [Presentation] Indirect method application for RI-beam experiments (2018)
  • Author(s): H. Yamaguchi
  • Organizer: ECT* Workshop "Indirect Methods in Nuclear Astrophysics''
  • Int'l Joint Research / Invited
• [Presentation] Studies on nuclear astrophysics and nuclear clustering with low-energy RI beams at CRIB (2018)
  • Author(s): H. Yamaguchi
  • Organizer: 13th International Conference on Nucleus-Nucleus Collisions (NN2018)
  • Int'l Joint Research / Invited
• [Presentation] Nuclear astrophysics projects at the low-energy RI beam separator CRIB (2017)
  • Author(s): H. Yamaguchi
  • Organizer: The 8th Nuclear Physics in Astrophysics International conference (NPA8)
  • Int'l Joint Research
• [Presentation] Indirect studies on astrophysical reactions at the low-energy RI beam separator CRIB (2017)
  • Author(s): H. Yamaguchi
  • Organizer: The 14th International Symposium on Origin of Matter and Evolution of the Galaxies (OMEG2017)
  • Int'l Joint Research
• [Presentation] α共鳴散乱による不安定核クラスター状態の研究 (2017)
  • Author(s): 山口英斉
  • Organizer: RCNP研究会「核子・ストレンジネス多体系におけるクラスター現象」
• [Presentation] Direct measurements and detection techniques with low-energy RIBs (2017)
  • Author(s): H. Yamaguchi
  • Organizer: 9th European Summer School on Experimental Nuclear Astrophysics
  • Int'l Joint Research / Invited
• [Presentation] Studying nuclear astrophysics and nuclear clustering at the low-energy RI beam separator CRIB (2017)
  • Author(s): H. Yamaguchi
  • Organizer: The International Symposium on Physics of Unstable Nuclei 2017 (ISPUN2017)
  • Int'l Joint Research / Invited
• [Presentation] Study on alpha-cluster states via resonant scattering with low-energy RI beams (2017)
  • Author(s): H. Yamaguchi
  • Organizer: Workshop on Nuclear Cluster Physics 2017 (WNCP2017)
  • Int'l Joint Research / Invited
• [Presentation] Overview of recent experiments at CRIB (2016)
  • Author(s): H. Yamaguchi
  • Organizer: SKKU mini workshop
  • Place of Presentation: Sungkyunkwan University, Suwon (South Korea)
  • Year and Date: 2016-10-11
  • Int'l Joint Research
• [Presentation] Recent activities at the low-energy RI beam separator CRIB (2016)
  • Author(s): H. Yamaguchi
  • Organizer: RIBF users meeting 2016
  • Place of Presentation: 理化学研究所（埼玉県和光市）
  • Year and Date: 2016-09-08
  • Int'l Joint Research
• [Presentation] Overview of CRIB projects (2016)
  • Author(s): H. Yamaguchi
  • Organizer: The Second Sicily-East Asia Workshop on Low Energy Nuclear Physics (SEA2016)
  • Place of Presentation: 東京大学原子核科学研究センター（埼玉県和光市）
  • Year and Date: 2016-06-27
  • Int'l Joint Research
• [Presentation] Experimental studies of light-ion nuclear reactions using low-energy RI beams (2016)
  • Author(s): H. Yamaguchi
  • Organizer: The 14th International Symposium on Nuclei in the Cosmos (NIC-XIV)
  • Place of Presentation: 朱鷺メッセ（新潟県新潟市）
  • Year and Date: 2016-06-19
  • Int'l Joint Research / Invited
• [Presentation] Study on alpha-cluster levels in non-4n nuclei using low-energy RI beams (2016)
  • Author(s): H. Yamaguchi
  • Organizer: 11th International Conference on Clustering Aspects of Nuclear Structure and Dynamics
  • Place of Presentation: Universita di Napoli Federico II, Napoli (Italy)
  • Year and Date: 2016-05-23
  • Int'l Joint Research