Research and development on the method of nuclear shell-model calculations for massive parallel computations

• Project/Area Number: 25870168
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics; Computational science
• Research Institution: The University of Tokyo
• Principal Investigator: Shimizu Noritaka 東京大学, 大学院理学系研究科(理学部), 特任准教授 (30419254)
• Project Period (FY): 2013-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: 原子核殻模型 / 大規模並列計算 / 不安定核 / クリロフ部分空間法 / 量子多体計算 / 疎行列固有値問題 / 原子核構造計算 / 原子核殻模型計算 / 中重核構造

Outline of Final Research Achievements

In order to use recent massive parallel computers efficiently, I developed a nuclear shell-model calculation code "KSHELL" for massive parallel computation. This code runs efficiently also on a single node. It is equipped with a user-friendly interface and is openly distributed via the internet for nuclear-physics researchers including experimentalists. For solving an eigenvalue problem in nuclear shell-model calculations, I implemented thick-restart block-Lanczos and Sakurai-Sugiura methods in addition to the conventional Lanczos method.

Research Products

• [Journal Article] Large-scale shell-model analysis of the neutrinoless ββ decay of 48Ca (2016)
  • Author(s): Y. Iwata, N. Shimizu, T. Otsuka, Y. Utsuno, J. Menendez, M. Honma, T. Abe
  • Journal Title: Physical Review Letters Volume: 116 Issue: 11 Pages: 112502-112502
  • DOI: 10.1103/physrevlett.116.112502
  • Peer Reviewed
• [Journal Article] Stochastic estimation of nuclear level density in the nuclear shell model: an application to parity-dependent level density in 58Ni (2016)
  • Author(s): N. Shimizu, Y. Utsuno, Y. Futamura, T. Sakurai, T. Mizusaki, T. Otsuka
  • Journal Title: Physics Letters B Volume: 753 Pages: 13-17
  • DOI: 10.1016/j.physletb.2015.12.005
  • NAID: 120007129676
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Nature of Isomerism in Exotic Sulfur Isotopes (2015)
  • Author(s): Y. Utsuno, N. Shimizu, T. Otsuka, T. Yoshida, and Y. Tsunoda
  • Journal Title: Physical Review Letters Volume: 114 Issue: 3 Pages: 032501-032501
  • DOI: 10.1103/physrevlett.114.032501
  • Peer Reviewed
• [Journal Article] Large-scale shell-model calculations for unnatural-parity high-spin states in neutron-rich Cr and Fe isotopes (2014)
  • Author(s): T. Togashi, N. Shimizu, Y. Utsuno, T. Otsuka, and M. Honma
  • Journal Title: Physical Review C Volume: 91 Issue: 2 Pages: 024320-024320
  • DOI: 10.1103/physrevc.91.024320
  • NAID: 120006683931
  • Peer Reviewed
• [Presentation] ベイズ統計による殻模型計算解析 (2017)
  • Author(s): 清水則孝, 富樫智章, 大塚孝治, 宇都野穣, 吉田聡太,
  • Organizer: 日本物理学会第72回年次大会
  • Place of Presentation: 大阪大学(大阪府豊中市)
  • Year and Date: 2017-03-17
• [Presentation] Nuclear shell-model calculations in HPC (2016)
  • Author(s): N. Shimizu
  • Organizer: First Tsukuba-CCS-RIKEN joint workshop on microscopic theories of nuclear structure and dynamics
  • Place of Presentation: 筑波大学計算科学研究センター(茨城県つくば市)
  • Year and Date: 2016-12-15
  • Int'l Joint Research / Invited
• [Presentation] Large-scale shell-model studies for exotic nuclei and nuclear level densities (2016)
  • Author(s): N. Shimizu
  • Organizer: International Conference Nuclear Theory in the Supercomputing Era 2016
  • Place of Presentation: Pacific National University, Russia
  • Year and Date: 2016-09-21
  • Int'l Joint Research / Invited
• [Presentation] Shape phase transition and shell evolution in large-scale shell-model calculations (2016)
  • Author(s): N. Shimizu
  • Organizer: 8th Workshop on Quantum Phase Transitions in Nuclei and Many-Body Systems (QPTn 2016)
  • Place of Presentation: Charles University, Prague, Chech Republic
  • Year and Date: 2016-06-06
  • Int'l Joint Research / Invited
• [Presentation] Nuclear structure and excitations clarified by Monte Carlo Shell Model calculation on K computer (2015)
  • Author(s): N. Shimizu
  • Organizer: International symposium on Quarks to Universe in Computational Science (QUCS 2015)
  • Place of Presentation: 奈良春日野国際フォーラム甍(奈良県奈良市 )
  • Year and Date: 2015-11-04
  • Int'l Joint Research / Invited
• [Presentation] Stochastic estimation of level density in nuclear shell-model calculations (2015)
  • Author(s): N. Shimizu
  • Organizer: The 5th International Workshop on Compound-Nuclear Reactions and Related Topics (CNR*15)
  • Place of Presentation: 東京工業大学・大岡山キャンパス(東京都目黒区)
  • Year and Date: 2015-10-20
  • Int'l Joint Research
• [Presentation] 殻模型計算における確率論的な準位密度計算法 (2015)
  • Author(s): 清水則孝, 二村保徳, 櫻井鉄也, 水崎高浩, 宇都野穣,大塚孝治
  • Organizer: 日本物理学会2015年秋季大会
  • Place of Presentation: 大阪市立大学杉本キャンパス(大阪府大阪市)
  • Year and Date: 2015-09-27
• [Presentation] Large-scale shell model calculations on E1 spectra in medium-heavy nuclei (2015)
  • Author(s): N. Shimizu
  • Organizer: The 5th international conference on Collective Motion in Nuclei under Extreme Conditions (COMEX5)
  • Place of Presentation: Krakow, Poland
  • Year and Date: 2015-09-15
  • Int'l Joint Research / Invited
• [Presentation] Introduction to shell model code "KSHELL" (2014)
  • Author(s): Noritaka Shimizu
  • Organizer: Progress in nuclear shell-model calculations in CNS-RIKEN collaboration
  • Place of Presentation: RIKEN Nishina Center, Wako, Japan
  • Year and Date: 2014-11-26
• [Presentation] Shell-model description of E1 excitation (2014)
  • Author(s): N. Shimizu, Y. Utsuno, T. Togashi, T. Otsuka and M. Honma
  • Organizer: American Physical Society, 4th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
  • Place of Presentation: Hotel Waikolowa, Hawaii, USA
  • Year and Date: 2014-10-11
• [Presentation] 大規模並列計算に向けたランチョス法による原子核殻模型計算コードの開発
  • Author(s): 清水則孝
  • Organizer: 日本物理学会第69会年次大会
  • Place of Presentation: 東海大学湘南キャンパス
• [Presentation] 大規模殻模型計算によるカルシウム同位体のE1励起の研究
  • Author(s): 清水則孝
  • Organizer: ミニワークショップ 「原子核E1応答と核物質の状態方程式」
  • Place of Presentation: 東京工業大学大岡山キャンパス
• [Presentation] カルシウム同位体のE1励起の大規模殻模型計算
  • Author(s): 清水則孝、宇都野穣、江幡修一郎、本間道雄、水崎高浩、大塚孝治
  • Organizer: 日本物理学会2013年秋季大会
  • Place of Presentation: 高知大学
• [Remarks] Nuclear shell-model code, "KSHELL"
  • URL: http://arxiv.org/abs/1310.5431