Kyushu University Academic Staff Educational and Research Activities Database
Researcher information (To researchers) Need Help? How to update
Matsumoto Takuma Last modified date:2021.09.03

Post-doctoral Fellow / Department of Physics
Faculty of Sciences


Graduate School
Undergraduate School


E-Mail *Since the e-mail address is not displayed in Internet Explorer, please use another web browser:Google Chrome, safari.
Homepage
https://kyushu-u.pure.elsevier.com/en/persons/takuma-matsumoto
 Reseacher Profiling Tool Kyushu University Pure
http://www.nt.phys.kyushu-u.ac.jp/english/index.html
Academic Degree
Ph.D of Science
Country of degree conferring institution (Overseas)
No
Field of Specialization
Nuclear Theory
Total Priod of education and research career in the foreign country
00years00months
Research
Research Interests
  • Theoretical study of nuclear reactions and structures for few-body systems
    keyword : Nuclear Reaction Theory
    2011.09.
Academic Activities
Papers
1. Takuma Matsumoto, Masanobu Yahiro, Antihalo effects on reaction cross sections for 14,15,16C isotopes, Physical Review C90, 041602, 2014.10, We study antihalo effects on reaction cross sections σR for C14,15,16 scattering from a C12 target at 83 MeV/nucleon, using the g-matrix double-folding model. C15 is described by the 14C+n two-body model that reproduces the measured large s-wave spectroscopic factor, i.e., the shell inversion that the 1s1/2 orbital is lower than the 0d5/2 orbital in energy. C16 is described by the 14C+n+n three-body model with the phenomenological three-body force (3BF) that explains the measured small s-wave spectroscopic factor. The 3BF allows the single-particle energies of the 14C+n subsystem to depend on the position r of the second neutron from the center of mass of the subsystem. The 1s1/2 orbital is lower than the 0d5/2 orbital for large r, but the shell inversion is restored for small r. Antihalo effects due to the “partial shell inversion” make σR for C16 smaller than that for C15. We also investigate projectile breakup effects on the mass-number dependence of σR with the continuum-discretized coupled-channel method..
2. T. Matsumoto, D. Ichinkhorloo, Y. Hirabayashi, S. Chiba and K. Kato, Systematic description of the 6Li(n,n')6Li* -> d + alpha reactions with the microscopic coupled-channels method, Phys. Rev. C83, 064611, 2011.06.
3. T. Matsumoto, K. Kato, and M. Yahiro, New description of the four-body breakup reactions, Physical Review C82, 051602, 2010.11.
4. Takuma Matsumoto, Tomoaki Egami, Kazuyuki Ogata, and Masanobu Yahiro, Smoothing Method of Discrete Breakup S-Matrix Elements in the Theory of Continuum-Discretized Coupled Channels, Progress of Theoretical Physics Vol. 121, No. 4 (2009), pp. 885-894, 2009.04, We present a practical way of smoothing discrete breakup $S$-matrix elements
calculated by the continuum-discretized coupled-channel method
(CDCC). This method makes the smoothing procedure much easier.
The reliability of the smoothing method is
confirmed for two three-body breakup reactions,
$^{58}$Ni($d,pn$) at 80~MeV and
$^{12}$C($^6$He,$^4$He$^2n$) at 229.8~MeV..
5. T. Matsumoto, T. Egami, K. Ogata, Y. Iseri, M. Kamimura, and M. Yahiro, Coulomb breakup effects on the elastic cross section of 6He+209Bi scattering near Coulomb barrier energies, Physical Review C 73, 051602, 2006.05.
6. T. Matsumoto, E. Hiyama, K. Ogata, Y. Iseri, M. Kamimura, S. Chiba, and M. Yahiro, Continuum-discretized coupled-channels method for four-body nuclear breakup in 6He+12C scattering, Physical Review C 70, 061601, 2004.12.
7. T. Matsumoto, T. Kamizato, K. Ogata, Y. Iseri, E. Hiyama, M. Kamimura, and M. Yahiro, New treatment of breakup continuum in the method of continuum discretized coupled channels, Physical Review C 68, 064607, 10.1103/PhysRevC.68.064607, 68, 6, 2003.02.
Presentations
1. 松本 琢磨, Study of resonances via CDCC analyses of (p,p′) and (α,α′) reactions, RCNP "Workshop on RI-beam Spectroscopy by Innovative Gaseous Active Targets" Program, 2019.12.
2. 小川 翔也, 松本 琢磨, Analysis of resonances in 6He via 6He(p,p′) reactions, RCNP "Workshop on RI-beam Spectroscopy by Innovative Gaseous Active Targets" Program, 2019.12.
3. 小川 翔也, 松本 琢磨, Microscopic analysis based on g-matrix folding model for reactions involving unstable nuclei, The Fifth Joint Meeting of the Nuclear Physics Divisions of APS and JPS, 2018.10.
4. 山田 悠真, 松本 琢磨, The study of resonant states in 12C via 12C+nucleon scattering, The 17th CNS International Summer School (CNSSS18), 2018.08.
5. 小川 翔也, 松本 琢磨, Microscopic optical potentials including breakup effects for unstable nucleus scattering, The 17th CNS International Summer School (CNSSS18), 2018.08.
6. T. Matsumoto, J. Tanaka, K. Ogata, Borromean Feshbach resonance in 11Li studied via 11Li(p,p'), DREB2018 -- 10th International Conference on Direct Reactions with Exotic Beams, 2018.06, 中性子ドリップライン近傍の原子核は、過剰中性子がコアとなる原子核の周り
に薄く中性子の層をもつハロー構造など安定核には見られない構造が発見され
理論実験の両面から研究が進められている。このハロー構造は11Li原子核に
よって発見され、9Li核に2つの中性子が薄く広がった2中性子ハロー核であり、
さらにその部分系(9Li-n, n-n)が束縛しないボロミアン構造を持つことなどが
知られている。一方でその励起状態となる共鳴状態については、その存在自体
が不明で、実験と理論の両面から議論され未だ解決していない問題である。

実験的に原子核の共鳴状態は、(p,p')、(alpha,alpha')や分解反応における
エネルギースペクトルに幅を持ったピークとして観測される。最近TRIUMFで
測定された11Li(p,p')反応の断面積に低励起エネルギー領域のピークが観測
された。このピークは陽子標的との核力による励起であり、これまで観測
されていたクーロン分解による電磁遷移とは異なり、11Liの励起共鳴状態
の存在を示唆していると考えられる。

本研究では、11Li(p,p')反応を離散化チャネル結合法(CDCC)により解析
することで、11Li低励起共鳴状態について議論する。解析では11Liを9Li+n+n
の三体模型で記述し、共鳴状態については複素スケーリング法により求め、
その構造について明かにした。.
7. T. Matsumoto, J. Tanaka, K. Ogata, Borromean Feshbach resonance in 11Li studied via 11Li(p,p'), International workshop on Hadron and Nuclear Physics 2017, 2017.12.
8. T. Matsumoto, S. Watababe, T. Toyokawa, and M. Yahiro, Study of halo nature via reaction and neutron removal cross sections, International Nuclear Physics Conference (INPC) 2016, 2016.08.
9. 松本 琢磨, Study on breakup mechanism of unstable nuclei with CDCC, 14th international conference on nuclear reaction mechanisms, 2016.06.
10. T. Matsumoto, S. Watababe, T. Toyokawa, and M. Yahiro, Study of one- and two-neutron removal reactions with core + n + n model, Direct Reactions with Exotic Beams (DREB) 2016, 2016.06.
11. 松本 琢磨, 緒方 一介, 八尋 正信, 蓑茂工将, Recent Development of CDCC, Progress in and beyond Theoretical Nuclear Physics Laboratory, 2016.03.
12. 松本 琢磨, Systematic analysis of nuclear reaction involving unstable nuclei with few-body model, International Molecule-type workshop Structure and reaction of light exotic nuclei, 2015.01.
13. 松本 琢磨, 緒方 一介, 八尋 正信, 蓑茂工将, 渡邉慎, 佐々部悟, Systematic analyses of one- and two-neutron removal cross sections with eikonal reaction theory, DREB2014-Direct Reactions with Exotic Beams, 2014.07.
14. 松本 琢磨, 緒方 一介, 八尋 正信, 蓑茂工将, 渡邉慎, Systematical analysis of three- and four-body breakup reactions with CDCC, WORKSHOP ON BREAKUP REACTIONS AND RELATED TOPICS, 2014.07.
15. 松本 琢磨, 佐々部悟, 蓑茂工将, 古立 直也, 緒方 一介, 八尋 正信, Systematic Analysis for Distribution of Extra Neutrons and Core in Halo Nucleus, The 2nd Conference on "Advances in Radioactive Isotope Science (ARIS2014)", 2014.06.
16. 松本 琢磨, 緒方 一介, 八尋 正信, 蓑茂工将, 渡邉慎, 佐々部悟, CDCC Studies on Cluster Physics, 3rd International Workshop on “State of the Art in Nuclear Cluster Physics”, 2014.05.
17. 松本 琢磨, 蓑茂 工将, 緒方 一介, 八尋 正信, 加藤 幾芳, Four-body CDCC analysis for breakup reactions of three-body projectiles, The 20th International IUPAP Conference on Few-Body Problems in Physics (FB20), 2012.08.
18. 松本 琢磨, 蓑茂 工将, 緒方 一介, 八尋 正信, 加藤 幾芳, CDCC analysis for breakup of three body projectiles, 13th International Conference on Nuclear Reaction Mechanisms, 2012.06.
19. , [URL].