Development of a target system of stopped unstable nuclei for studies of resonance states in unstable nuclei

• Project/Area Number: 24654066
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Osaka University
• Principal Investigator: TAMII Atsushi 大阪大学, 核物理研究センター, 准教授 (20302804)
• Co-Investigator(Renkei-kenkyūsha): FUJITA Yoshitaka 大阪大学, 核物理研究センター, 准教授 (60093457) ; SUZUKI Tomokazu 大阪大学, 核物理研究センター, 助教 (80506395)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2012: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: 不安定核停止標的 / ビッグバン元素合成 / 不安定核構造 / インプラント標的 / 核反応 / 不安定核 / 軽イオン核反応 / 核構造

Outline of Final Research Achievements

We have developed a system of stopped unstable nucleus target for studies of excited states of unstable nuclei and low-energy nuclear reactions that are relevant to nuclear astrophysics. We have successfully demonstrated the achievability of those measurements.
Implanted stable nucleus targets were produced by bombarding a deuteron beam on metallic foils in 1 mm diameter. By irradiating a higher energy deuteron beam on the target, deuteron-deuteron fusion reaction has been successfully detected.
Next unstable beryllium nuclei were produced by bombarding a proton beam on lithium target in 1 mm diameter. By irradiating a deuteron beam on the target, outgoing protons produced by the nuclear reaction with an beryllium nucleus and a deuteron has been successfully identified. This is the first successful measurement of nuclear reactions with stopped unstable nucleus target in a small area.

Research Products

• [Journal Article] Electromagnetic M1 transition strengths from inelastic proton scattering: The cases of Ca-48 and Pb-208 (2016)
  • Author(s): J. Birkhan et al.
  • Journal Title: Physical Review C Volume: 93 Issue: 4
  • DOI: 10.1103/physrevc.93.041302
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Dipole polarizability of 120Sn and nuclear energy density functionals (2015)
  • Author(s): T. Hashimoto, A. M. Krumbholz, A. Tamii, T. Adachi, N. Aoi, C. A. Bertulani, H. Fujita, Y. Fujita et al.
  • Journal Title: PHYSICAL REVIEW C Volume: 92 Issue: 3 Pages: 031305-031305
  • DOI: 10.1103/physrevc.92.031305
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Nonquenched Isoscalar Spin-M1 Excitations in sd-Shell Nuclei (2015)
  • Author(s): H. Matsubara, A. Tamii, H. Nakada, T. Adachi, J. Carter, M. Dozono, H. Fujita, K. Fujita, Y. Fujita et al.
  • Journal Title: PHYSICAL REVIEW LETTERS Volume: 115 Issue: 10 Pages: 1025011-6
  • DOI: 10.1103/physrevlett.115.102501
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Fabrication of isotopic and natural carbon foils by thermal cracking method and some issues (2015)
  • Author(s): I. Sugai, M. Oyaizu, K. Bessho, and A. Tamii
  • Journal Title: Journal of Radioanalytical and Nuclear Chemistry Volume: 305 Issue: 3 Pages: 731-736
  • DOI: 10.1007/s10967-015-3961-4
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Low-energy electric dipole response in 120Sn (2015)
  • Author(s): A.M. Krumbholz, P. von Neumann-Cosel, T. Hashimoto, A. Tamii, T. Adachi, C.A. Bertulani, H. Fujita, Y. Fujita, E. Ganioglu, K. Hatanaka, C. Iwamoto, T. Kawabata, N.T. Khai, A. Krugmann, D. Martin, H. Matsubara, R. Neveling, H. Okamura, H.J. Ong, I. Poltoratska et al.
  • Journal Title: Physics Letters B Volume: 744 Pages: 7-12
  • DOI: 10.1016/j.physletb.2015.03.023
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] 中性子スキンと原子核の状態方程式 (2014)
  • Author(s): 民井淳､銭廣十三
  • Journal Title: 日本物理学会誌 Volume: 69 Pages: 6-13
  • Peer Reviewed
• [Journal Article] Electric dipole response of 208Pb probed by proton inelastic scattering: constraints on the neutron skin thickness and symmetry energy (2014)
  • Author(s): A. Tamii 他
  • Journal Title: European Physics Journal A Volume: 50 Issue: 2
  • DOI: 10.1140/epja/i2014-14028-7
  • Peer Reviewed
• [Journal Article] Observation of Low- and High-Energy Gamow-Teller Phonon Excitations in Nuclei (2014)
  • Author(s): Y. Fujita, H. Fujita, T. Adachi, C. L. Bai, A. Algora, M. Honma, K. Matsuyanagi, B. Rubio, H. Sagawa, A. Tamii et al.
  • Journal Title: Physical Review Letters Volume: 112 Issue: 11 Pages: 1125021-5
  • DOI: 10.1103/physrevlett.112.112502
  • Peer Reviewed
• [Journal Article] Probing effect of tensor interactions in 16O via (p,d) reaction. (2013)
  • Author(s): H.J. Ong, I. Tanihata et al.,
  • Journal Title: Physics Letters B Volume: 725 Issue: 4-5 Pages: 277-281
  • DOI: 10.1016/j.physletb.2013.07.038
  • Peer Reviewed
• [Journal Article] Studies of Electric Dipole Response in Nuclei Using the Scattering of Polarized Protons (2013)
  • Author(s): A. Tamii
  • Journal Title: Acta Physica Polonica B Volume: 44 Issue: 3 Pages: 571-580
  • DOI: 10.5506/aphyspolb.44.571
  • Peer Reviewed
• [Journal Article] Isospin mixing of the isobaric analog state studied in a high-resolution 56Fe(3He, t)56Co reaction (2013)
  • Author(s): H. Fujita, Y. Fujita, T. Adachi, H. Akimune, N. T. Botha, R. Neveling, F. D. Smit, A. Tamii et al.
  • Journal Title: Physical Review C Volume: 88 Issue: 5 Pages: 0543291-6
  • DOI: 10.1103/physrevc.88.054329
  • Peer Reviewed
• [Journal Article] High-resolution Zr-96(He-3,t) experiment and the matrix element for double-beta decay (2012)
  • Author(s): J. H. Thies, A. Tamii 他
  • Journal Title: Physical Review C Volume: 86 Issue: 5
  • DOI: 10.1103/physrevc.86.054323
  • Peer Reviewed
• [Journal Article] High-resolution 100Mo(3He,t)100Tc charge-exchange experiment and the impact on double- (2012)
  • Author(s): J.H. Thies, T. Adachi, M. Dozono, H. Ejiri, D. Frekers, H. Fujita, Y. Fujita, M. Fujiwara, E.-W. Grewe, K. Hatanaka, P. Heinrichs, et al.
  • Journal Title: Physical Review C Volume: 86 Issue: 4 Pages: 0443091-8
  • DOI: 10.1103/physrevc.86.044309
  • Peer Reviewed
• [Journal Article] High resolution (3He,t) experiment on the double-beta decaying nuclei 128Te and 130Te (2012)
  • Author(s): P. Puppe, A. Lennarz, T. Adachi, H. Akimune, H. Ejiri, D. Frekers, H. Fujita, Y. Fujita, M. Fujiwara, E. Ganio?lu, E.-W. Grewe, K. Hatanaka, R. Hodak, et al.
  • Journal Title: Physical Review C Volume: 86 Issue: 4 Pages: 0446031-8
  • DOI: 10.1103/physrevc.86.044603
  • Peer Reviewed
• [Journal Article] The (3He,t) reaction on 76Ge, and the double-beta-decay matrix element (2012)
  • Author(s): J.H. Thies, D. Frekers, T. Adachi, M. Dozono, H. Ejiri, H. Fujita, Y. Fujita, M. Fujiwara, E.-W. Grewe, et al.
  • Journal Title: Physical Review C Volume: 86 Issue: 1 Pages: 0143041-11
  • DOI: 10.1103/physrevc.86.014304
  • Peer Reviewed
• [Journal Article] Separation of Pygmy Dipole and M1 Resonances in 90Zr by a High-Resolution Inelastic Proton Scattering Near 0 degrees (2012)
  • Author(s): C. Iwamoto, H. Utsunomiya, A. Tamii, H. Akimune, H. Nakada, T. Shima, T. Yamagata, T. Kawabata, Y. Fujita, H. Matsubara, et al.
  • Journal Title: Physical Review Letters Volume: 108 Issue: 26 Pages: 2625011-4
  • DOI: 10.1103/physrevlett.108.262501
  • Peer Reviewed
• [Journal Article] H. Matsubara, A. Tamii 他 (2012)
  • Author(s): Wide-window gas target system for high resolution experiment with magnetic spectrometer
  • Journal Title: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A Volume: 678 Pages: 122-129
  • DOI: 10.1016/j.nima.2012.03.005
  • Peer Reviewed
• [Journal Article] I. Poltoratska, A. Tamii 他 (2012)
  • Author(s): Pygmy dipole resonance in Pb-208
  • Journal Title: Physical Review Letters Volume: 85
  • Peer Reviewed
• [Presentation] Development of an Experimental Method Using Implanted Target: First Application to the 7Be(d,p) Reaction for the Study of the Primordial 7Li Production in the Big-Bang Nucleosynthesis (2016)
  • Author(s): A. Inoue et al.,
  • Organizer: IIIrd Topical Workshop on Modern Aspects in Nuclear Structure
  • Place of Presentation: Bormio, Italy
  • Year and Date: 2016-02-22
  • Int'l Joint Research
• [Presentation] Excitation of E1 States in Inelastic Proton Scattering and RCNP Activities (2015)
  • Author(s): A. Tamii
  • Organizer: 5th Int. Conf. on Collective Motion in Nuclei under Extreme Conditions (COMEX5)
  • Place of Presentation: Krakow, Poland
  • Year and Date: 2015-09-14
  • Int'l Joint Research / Invited
• [Presentation] Electric Dipole Response of Nuclei and the Symmetry Energy of the Nuclear Equation of State (2015)
  • Author(s): A. Tamii
  • Organizer: the 12th Int. Conf. on Nucleus-Nucleus Collisions (NN2015)
  • Place of Presentation: Catania, Italy
  • Year and Date: 2015-06-21
  • Int'l Joint Research / Invited
• [Presentation] Nuclear Response and Gamma Emissivity Studied by Proton Inelastic Scattering (2015)
  • Author(s): A. Tamii
  • Organizer: Neutrino and Dark Matter in Nuclear Physics
  • Place of Presentation: Jyvaskyla, Finland
  • Year and Date: 2015-06-01
  • Int'l Joint Research / Invited
• [Presentation] インプラント標的を用いた軽イオン散乱測定の開発 (2015)
  • Author(s): 三浦正季
  • Organizer: 日本物理学会第70回年次大会
  • Place of Presentation: 早稲田大学､東京､日本
  • Year and Date: 2015-03-21 – 2015-03-22
• [Presentation] Neutron Skin Thickness of 208Pb and Constraints on Symmetry Energy (2014)
  • Author(s): A. Tamii
  • Organizer: 24th International Nuclear Physics Conference (INPC2013)
  • Place of Presentation: Firenze
  • Invited
• [Presentation] Studies of Electric Dipole Response in Nuclei Using the Scattering of Polarized Protons (2012)
  • Author(s): A. Tamii
  • Organizer: Zakopane Conference on Nuclear Physics 2012 Extremes of the Nuclear Landscape
  • Place of Presentation: Zakopane, Porland
  • Invited
• [Presentation] Study of Nuclear Structure and Reaction by Using Polarized Proton Beams at RCNP (2012)
  • Author(s): A. Tamii
  • Organizer: The 20th INTERNATIONAL SYMPOSIUM on Spin Physics (SPIN2012)
  • Place of Presentation: Dubna, Russia
  • Invited
• [Presentation] Electric Dipole Response of 208Pb Neutron Skin Thickness and Symmetry Energy (2012)
  • Author(s): A. Tamii
  • Organizer: The 4th international conference on Collective Motion in Nuclei under Extreme Conditions (COMEX4)
  • Place of Presentation: Kanagawa, Japan
  • Invited
• [Presentation] Non-resonant Triple-a Reaction Rate at Low Temperature (2012)
  • Author(s): A. Tamii
  • Organizer: The 20th International IUPAP Conference on Few-Body Problems in Physics (FB20)
  • Place of Presentation: Hakata, Japan
• [Remarks] プレスリリース: 原子核中のスピン整列を観測 － 湯川博士が予測したパイ粒子による力の痕跡を発見 －
  • URL: https://www.rcnp.osaka-u.ac.jp/jp/topics/rcnp_pressrelease_spinM1_20150831.pdf
• [Remarks] グランドライデン前方モードビームライン
  • URL: http://www.rcnp.osaka-u.ac.jp/Divisions/np1-a/GRFBL/
• [Remarks] GRFBL Home Page
  • URL: http://www.rcnp.osaka-u.ac.jp/Divisions/np1-a/GRFBL/
• [Remarks] プレスリリース：原子核の中性子皮の振動の分離観測に成功
  • URL: http://www.rcnp.osaka-u.ac.jp/jp/topics/press_release-120619.pdf