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Research development of microscopic track simulation codes for heavy ions

Research Project

Project/Area Number 12680503
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field エネルギー学一般
Research InstitutionKYUSHU UNIVERSITY

Principal Investigator

UEHARA Shuzo  Kyushu University, School of Health Sciences, Professor, 医療技術短期大学部, 教授 (90038927)

Project Period (FY) 2000 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 2001: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2000: ¥1,300,000 (Direct Cost: ¥1,300,000)
KeywordsMonte Carlo simulation / Cross sections of interactions / Charge exchanges / Stopping power / Heavy ion track structure / Full slowing down code / Microdosimetry / Radiation action / モンテカルロシミュレーション / マイクロドシメトリ
Research Abstract

1. Introduction
Radiation track structure (microscopic spatial distributions of ionization and excitation) obtained by Monte Carlo simulation contributes significantly to research of radiation effects. We have developed new generation track codes for low-energy protons and alpha particles, in which charge exchange processes and nuclear elastic scattering are taken into account.
2.Methods
In the energy range below 0.3MeVu^<-1> for H^+ and He^<++>, neutral or dressed ions such as H^0 or He^+ and He^0 are generated by electron capture. Experimental and theoretical cross sections for all these particles for water molecule were collected and compiled. Secondary electrons ejected by ion impact were traced by the electron code kurbuc developed by ourselves. The reliability of the codes was confirmed by comparing the various physical parameters with the published data
3. Results
Calculated electronic and nuclear stopping powers, ranges and W values agreed with ICRU data within 10% uncertainties. Th … More e codes provided various microdosimetric quantities such as radial dose distributions, restricted stopping powers and lineal energy spectra. These data were in good agreement with the published data.
4. Conclusions
Newly developed low-energy codes, lephist for protons and leahist for alpha particles, are "full slowing down codes", not "track segment code" conventionally used. The impact on the research field of track structure may be large. The effective energy ranges are 1 keV to 1 MeV for protons and 1 keV to 8 MeV for alpha particles. Therefore, these are useful for applications to the mechanistic understanding of radiation effects of neutrons and heavy ions in environment. Track structure identifies the products of H_2O^+, H_2O^+ and e_<sub>^- at the physical stage. These products immediately form the radicals, OH, H, e_<aq>^-, and so on, due to chemical reactions with water molecules. The future objective is to develop an inclusive track structure code including radiation chemistry as a function of time between 10^<-15> and 10^<-6>s. Less

Report

(3 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • Research Products

    (25 results)

All Other

All Publications (25 results)

  • [Publications] S.Uehara, H.Nikjoo: "Monte Carlo track structure code for low-energy alpha particles in water"Journal of Physical Chemistry. (accepted).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] S.Uehara, H.Nikjoo: "Track structure for low-energy ions including charge exchang processes"Radiation Protection Dosimetry. (in press). (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H.Nikjoo, S.Uehara, I.K.Khvostunov, et al.: "Monte Carlo track structure for radiation biology and space applications"Physica Medica. 17.Sup1. 38-44 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] S.Uehara, L.H.Toburen, H.Nikjoo: "Development of a Monte Carlo track structure code for low-energy protons in water"International Journal of Radiation Biology. 77.2. 139-154 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] S.Uehara, L.H.Toburen, W.E.Wilson, D.T.Goodhead, H.Nikjoo: "Calculations of electronic stopping cross sections for low-energy protons in water"Radiation Physics and Chemistry. 59.1. 1-11 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] S.Uehara, H.Nikjoo: "Track structure calculations of low-energy protons in water"Proceedings of the 4th International Conference on Supercomputing in Nuclear Applications (SNA2000). BS-015. 1-8 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H.Nikjoo, S.Uehara, I.K.Khvostunov, et al.: "Advanced Monte Carlo for Radiation Physics, Particle Transport Simulation and Applications"Springer-Verlag, Heidelberg, Germany. 1192(251-260) (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] S.Uehara and H.Nikjoo: "Monte Carlo track structure code for low-energy alpha particles in water"Journal of Physical Chemistry. (To be published).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] S.Uehara, H.Nikjoo: "Track structure for low-energy ions including charge exchange processes"Radiation Protection Dosimetry. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H.Nikjoo, S.Uehara, I.K.Khvostunov, F.A.Cucinotta, W.E.Wilson, D.T.Goodhead: "Monte Carlo track structure for radiation biology and space applications"Physica Medica. 17, Suppl. 1. 38-44 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] S.Uehara, L.H.Toburen, H.Nikjoo: "Development of a Monte Carlo track structure code for low-energy protons in water"International Journal of Radiation Biology. 77(2). 139-154 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H.Nikjoo, S.Uehara, I.K.Khvostunov, F.A.Cucinotta: "Track structure in molecular radiation biology"Advanced Monte Carlo for Radiation Physics, Particle Transport Simulation and Applications (A.Kling et al. eds) pp. 251-260, Springer, Heidelberg. (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H.Nikjoo, N.Pratt-Boyden, S.Uehara, D.T.Goodhead: "Energy deposition by monoenergetic protons in cylindrical targets"MRC Radiation and Genome Stability Unit, Monograph 2001/1. (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] S.Uehara, H.Nikjoo, S.Endo, D.T.Goodhead: "Recent developments in radiation track structure"Radiation Research, Vol.2, Congress Proceedings. (M.Moriarty et al. eds) pp. 118-121. Allen Press. Lawrence, KS. (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] S.Uehara, L.H.Toburen, W.E.Wilson, D.T.Goodhead, H.Nikjoo: "Calculations of electronic stopping cross sections for low-energy protons in water"Radiation Physics and Chemistry. 59(1). 1-11 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] S.Uehara, H.Nikjoo: "Track structure calculations of low-energy protons in water"Proceedings of the 4th International Conference on Supercomputing in Nuclear Applications (SNA2000). BS-015. 1-8 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] S.Uehara, H.Nikjoo: "Monte Carlo track structure code for low-energy alpha particles in water"Journal of Physical Chemistry. (accepted). (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] S.Uehara, H.Nikjoo: "Track structure for low-energy ions including charge exchange processes"Radiation Protection Dosimetry. (in press). (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] H.Nikjoo, S.Uehara, I.K.Khvostunov, F.A.Cucinotta, W.E.Wilson, et al.: "Monte Carlo track structure for radiation biology and space applications"Physica Medica. 17・sup.1. 38-44 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] H.Nikjoo, S.Uehara, I.K.Khvostunov, F.A.Cucinotta: "Advanced Monte Carlo for Radiation Physics, Particle Transport Simulation and Applications(分担執筆 251-260頁)"Springer-Verlag, Heidelberg, Germany. 1192 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] S.Uehara,H.Nikjoo,D.T.Goodhead: "Comparison and assessment of electron cross sections for Monte Carlo track structure codes"Radiation Research. 152・2. 202-213 (1999)

    • Related Report
      2000 Annual Research Report
  • [Publications] S.Uehara: "Track structure code for low-energy protons"Japanese Journal of Medical Physics. 19・Sup61. 97-99 (1999)

    • Related Report
      2000 Annual Research Report
  • [Publications] S.Uehara,L.H.Toburen, et al.: "Calculations of electronic stopping cross sections for low-energy protons in water"Radiation Physics and Chemistry. 59・1. 1-11 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] S.Uehara,L.H.Toburen,H.Nikjoo: "Development of a Monte Carlo track structure code for low-energy protons in water"International Journal of Radiation Biology. 77・2. 139-154 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] S.Uehara,H.Nikjoo,S.Endo,D.T.Goodhead: "Radiation Research Vol.2, Congress Proceedings(分担執筆118-121頁)"Allen Press, Lawrence, KS, USA. 900 (2000)

    • Related Report
      2000 Annual Research Report

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Published: 2000-04-01   Modified: 2016-04-21  

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