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EASY 2007

EASY-2007: European Activation System

EASY-2007 consists of a wide range of codes, data and documentation all aimed at the calculation of the response of materials irradiated by neutrons, deuterons or protons. This new version includes cross section data for deuteron- and proton-induced reactions as well as the neutron data in previous versions. All cross sections covers the energy range 0 - 60 MeV. It is designed to investigate fusion devices which will act as intense sources of high energy (14 MeV) neutrons and cause significant activation of the surrounding materials. Another fusion related activity is the planned materials testing in IFMIF. This is based on an accelerator and will produce neutrons with energies up to 55 MeV. Activation calculations on IFMIF can be carried out using EASY-2007.

The very general nature of the calculational method and the data libraries used for EASY-2007 mean that it is applicable (with some reservations) to all situations (e.g. fission reactors or neutron sources) where materials are exposed to neutrons below 60 MeV. In addition activation of materials by deuterons or protons in accelerators can also be calculated. The components of EASY can be divided into two parts: library/code development tools and user tools. The former are required to develop the latter however, EASY users only need to be able to use the inventory code FISPACT and be aware of the contents of the EAF library (the data source).

The generation of the European Activation File (EAF) is carried out using the SAFEPAQ-II application; which uses as input many world-wide sources of nuclear data. These evaluated files, calculations and experimental data are used to construct a collection of cross section data for neutron-, deuteron- and proton-induced reactions on an extensive set of target nuclides (both stable and unstable), a set of decay data files and other data libraries required by FISPACT.

EASY-2007 is available for personal computers running Windows (98, NT4, 2000, XP and Vista) and for UNIX workstations. It comprises the EAF-2007 nuclear data libraries, FISPACT-2007 and documentation (seven UKAEA reports). For Windows users there is an additional tool - the EASY-2007 User Interface that enables FISPACT to be run, output files to be summarised, graphs plotted and the EAF data to be viewed.

A workshop dealing with data for EASY was held in Prague recently. Click here for details.

For further details, including how to upgrade from EASY-2005, contact Lee Packer.


A handbook of activation data for all of the elements, including data for particular neutron spectra, importance diagrams, pathways and transmutation information is now available. The handbook was calculated using EASY-2007 and provides activation information without the need to run FISPACT. It may be downloaded here:

Handbook of Activation Data Calculated Using EASY-2007 (PDF file, size 10.5Mb)
R.A. Forrest, A. Tabasso, C. Danani, S. Jakhar and A.K. Shaw
UKAEA report UKAEA FUS 552 (March 2009).




Documentation for the earlier versions EASY-99, EASY-2001, EASY-2003 and EASY-2005 are also available in our online Technical Documents collection.

Online EASY-2007 documentation

The European Activation System: EASY-2007 Overview (PDF file, size 391kb)
R.A. Forrest
UKAEA report UKAEA FUS 533 (January 2007).

FISPACT-2007: User manual (PDF file, size1.13Mb)
R.A. Forrest
UKAEA report UKAEA FUS 534 (February 2007).
The European Activation File: EAF-2007 neutron-induced cross section library (PDF file, size 1.96Mb)
R.A. Forrest, J. Kopecky and J-Ch.Sublet
UKAEA report UKAEA FUS 535 (January 2007).
The European Activation File: EAF-2007 deuteron- and proton-induced cross section libraries (PDF file, size 325kb)
R.A. Forrest
UKAEA report UKAEA FUS 536 (January 2007).
The European Activation File: EAF-2007 decay data library (PDF file, size 438kb)
R.A. Forrest
UKAEA report UKAEA FUS 537 (January 2007).
The European Activation File: EAF-2007 biological, clearance and transport libraries (PDF file, size 397kb)
R.A. Forrest
UKAEA report UKAEA FUS 538 (January 2007).

SAFEPAQ-II User manual (PDF file, size 4.58Mb)
R.A. Forrest
UKAEA report UKAEA FUS 454, Issue 7. (January 2007).

Other documentation

Validation of EASY-2007 using integral measurements (PDF file, size 12.43Mb)
R. A. Forrest, J. Kopecky, M. Pillon, A. Klix, S. P. Simakov, J-Ch Sublet, P. Bem, M. Honusek and E. Simeckova
UKAEA report UKAEA FUS 547 (April 2008).

The report on the validation of earlier versions of EAF EAF-2005, EAF-2003, EAF-2001 are also available.

Validation of EASY-2005 above 20 MeV (PDF file, size 1.6Mb)
R. A. Forrest and J. Kopecky
UKAEA report UKAEA FUS 529 (May 2006).

Revisions and improvements of neutron capture cross sections for EAF-2009 and validation of TALYS calculations
R. A. Forrest, J. Kopecky and A. J. Koning
UKAEA report UKAEA FUS 546 (March 2008)

Decay Power: a Comprehensive Experimental Validation (PDF file, size 7.38Mb)
J-Ch Sublet, F Maekawa
CEA Report CEA-R-6213-Decay-Power (May 2009)