Division of Ionizing Radiation


Accelerator Lab maintains, disseminates and develops standards for ionizing radation, including development of standards and measurement techniques related to exposure and air kerma in Co-60 γ-ray beams, absorbed dose to water in Co-60 γ-ray beams and in linear accelerator electron and photon beams, neutron fluence and neutron dose equivalent. It also deals with fundamental research work in the fields of dosimetry and metrology in gamma,...

  • Metrological Standards and Traceability System Research On...

    A clinical accelerator with seven x-ray energies of (4,6,8,10,15,18 and 25) MV will be operated in the Second Experimental Base. The standard devices will be installed to measure the reference radiation from 4 MV to 25 MV. The parameters of the...

  • Research on Electron Beam Graphite Calorimeter

    The aim of this project is to develop a calorimeter for use in electron beams. The new calorimeter can be used for high-dose measurements at industrial facilities and also can be used for therapy-...

  • Establishment and Research On The Air Kerma Primary...

    The standard was established to satisfy the needs for radiotherapy and radiation protection. It consists of cavity chamber, Co-60 radiation facility, current measurement system, positioning system, monitor and radiation security system. The...

International Cooperation

National Measurement Standards and CMCs

primary standard of air kerma in Co-60 γ-ray

Transfer Service Dosimetry System Calibration:Fricke Dosimeter, Alanine dosimeter



  • 86-10-64525009 Zhang Yanli
  • Head of laboratory
  • zhangyl@nim.ac.cn

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