Neutron Transmutation Database

Neutron Transmutation Database (NeuTran)

The Neutron Transmutation Database (NeuTran) includes the transmutation channels and cross sections of materials containing various nuclides under neutron irradiation as functions of the neutron energy. Photon dose, which indicates the gamma-ray shielding power of materials, can also be calculated.
Related Report


MatNavi user registration / authentication system updates : Needs re-registration

This notice is to inform you that we plan to update the user registration and authentication systems of MatNavi to improve its security. This update will take place on December 1, 2020.
Users who have registered to the old system must register again on the newly updated system. The old registered information will be completely discarded, and thus logging into the newly updated system with old information will not be possible.
We apologize for the inconvenience caused by this update and ask for your cooperation. The necessary steps to renew your user registration are described below.

The current MatNavi user registration system will be shut down at 18:00 (Japan time) on November 30, 2020.

As a result, all user information registered in the current system will be discarded and the registration information will be invalid.

Please re-register as a user after 15:00 (Japan time) on December 1, 2020.

Then you can continue to use MatNavi as you did before.



  • National Institute for Materials Science (NIMS) holds the copyright of this database system.
  • No reproduction, republication or distribution to third parties of any content is permitted without written permission of NIMS.
  • NIMS takes no responsibility for any damage incurred by the user as a result of using this database system.

System Requirements

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