Radiation Science Center Archives

Public release of calculation codes

• EGS-5 (Electron Gamma Shower-5) Electron and photon transport electromagnetic cascade Monte Carlo code
• BULK-I
  Radiation Shielding Tool for proton accelerator facilities in the 50-500 MeV range
• BULK-II
  Radiation Shielding Tool for proton and carbon beam accelerators in the 50 to 400 MeV range
• DUCT-III
  A Simple Design Code for Duct-Streaming Radiations
• PHITS
  Particle and Heavy Ion Transport code System
  

Academic journal articles, etc.

• ► Application of EGS4 to Health Physics Research/ 保健物理分野の研究へのEGS4の応用 This paper introduces the history and overview of EGS systems and their potential applications in health physics research. An explanatory article submitted to the Journal of Health Physics has been published as a KEK Preprint.
• ► What lies between calculation and measurement: X-ray and gamma ray detectors We have published an explanatory article submitted to the Journal of the Atomic and Molecular Society of Japan as a KEK Preprint. This article introduces and explains the various physical phenomena that occur between the information obtained from calculations and the actual “output values” obtained after energy absorption in detectors, focusing on representative X-ray and gamma-ray detectors. These are topics that are considered essential to understand when using calculation codes.
• ► The concept of photon dose and effective dose In accordance with the revision of the Radiation Hazards Prevention Act, this document provides an explanation of the relationship between the dose concepts for photons (such as air kerma) listed in Appendix 4 and effective dose, as well as the evaluation of effective dose based on measured values.
• ► Simplified calculation formula and effective dose conversion factors used in the shielding design of high-energy accelerator facilities　　We have clarified that the simplified evaluation based on ICRP-21 clearly evaluates the effective dose on the conservative side. (KEK Internal Report)
• ► Radiation education using EGS4 and EGS4PICT32 Radiation Education uses the electromagnetic cascade Monte Carlo code EGS4 and its latest version, EGS4PICT32, which displays trajectories on a PC.
• ► Adaptation of high-energy domain computational codes to low-energy domains An article on the improvement of EGS4 was published in the April 2000 issue of KEK News.
• "Data Library of Line- and Conical-Beam Response Functions and Four-Parameter Empirical Formula in Approximatin Response Functions for Gamma-ray Skyshine Dose Analyses"
• ►We have published a database for γ-ray sky shine dose analysis as a KEK Report.　The content covers line beam and conical beam response functions and their 4-parameter approximation formulas.
  KEK Report 2008-2.
• 10min_dose_rates.csv,   10min_dose_rates.xlsx,  20sec_dose_rates.csv,  20sec_dose_rates.xlsx,  2min_dose_rates.csv,  2min_dose_rates.xlsx
• HP_1-hour_High_dose_rate.csv,  HP_1-hour_High_dose_rate.xlsx,  HP_1-hour_Low_dose_rate(NaI).csv,  HP_1-hour_Low_dose_rate(NaI).xlsx,  HP_10min_Low_dose_rate(NaI).csv,  HP_10min_Low_dose_rate(NaI).xlsx
• High_dose_rate_1-hour_data.xlsx,  Low_dose_rate(NaI)_1-hour_data.xlsx,  Low_dose_rate(NaI)_10min_data.xlsx,  Low_dose_rate(NaI)_2min_data.xlsx
• Futatunuma_PH.xlsx,  Kamihatori_PH.xlsx,  Koriyama_PH.xlsx, Minamidai_PH.xlsx,  Momijiyama_PH.xlsx,  Mukaihata_PH.xlsx,  Ono_PH.xlsx, Ottozawa_PH.xlsx,  Shokan_PH.xlsx,  Yamada_PH.xlsx
• ►Radiation information chart paper data from monitoring posts in Fukushima Prefecture in March 2011　(KEK Internal 2023-8)
  CSV ,   XLSX 

Database disclosure

Gamma-ray Skyshine Database (LBRF or CBRF using EGS4)

• Line Beam Response Function (LBRF)
  • Exposure with Bremsstrahlung.
  • Exposure without Bremsstrahlung.
  • Exposure with Bremsstrahlung (NBS-29).
  • Ambient Dose Equivalent.
  • Effective Dose (Anterior-Posterior Geometry).
  • Effective Dose (Isotropic Geometry).
• Conical Beam Response Function (CBRF)
  • Exposure with Bremsstrahlung.
  • Exposure without Bremsstrahlung.
  • Exposure with Bremsstrahlung (NBS-29).
  • Ambient Dose Equivalent.
  • Effective Dose (Anterior-Posterior Geometry).
  • Effective Dose (Isotropic Geometry).
• Four Parameter Coefficients for LBRF and CBRF
  • Four Parameter Coefficients for LBRF.
  • Four Parameter Coefficients for CBRF.
    

Disclosure of measurement data

Energy and angular distribution of photo-neutrons for 16.6 MeV polarized photon on medium–heavy targets

Nucl. Instrum. Meth. A989, 11 February 2021, 164965
https://doi.org/10.1016/j.nima.2020.164965Figure7
Figure7_Pb.dat, Figure7_Au.dat, Figure7_Cu.dat, Figure7_Fe.dat, Figure7_Sn.dat, Figure7_Ti.dat, Figure10_PbHE.dat, Figure10_PbLE.dat, Figure10_AuHE.dat, Figure10_AuLE.dat, Figure10_CuHE.dat, Figure10_CuLE.dat, Figure10_FeHE.dat, Figure10_FeLE.dat, Figure10_SnHE.dat, Figure10_SnLE.dat, Figure10_TiHE.dat, Figure10_TiLE.dat,

Neutron emission spectrum from gold excited with 16.6 MeV linearly polarized monoenergetic photons

Journal of Nuclear Science and Technology Volume 57, 2020 - Issue 4, Pages 444-456
https://doi.org/10.1080/00223131.2019.1691073

Figure2, Figure11, Figure12

Figure14

Figure15

Energy spectra of neutrons penetrating concrete and steel shielding blocks from 24 GeV/c protons incident on thick copper target

Nuclear Inst. and Methods in Physics Research, A 998 (2021) 165189
https://doi.org/10.1016/j.nima.2021.165189

KEK Radiation Science Center Activity Report

Activity Report link is here.