Experimental Nuclear Reaction Data


EXFOR database contents

EXFOR is the name given to the database containing experimental data. In addition to storing the data and its bibliographic information, experimental information, including source of uncertainties, is also compiled.

The data presently included in the EXFOR database include:

Brief description of the EXFOR format

EXFOR is also the name of the exchange format designed to allow transmission of nuclear data between the Nuclear Reaction Data Centres. It has evolved to allow a large variety of numerical data tables with explanatory and bibliographic information to be transmitted in an easily machine-readable format.

An EXFOR entry (or "work" as it is commonly known) is divided into bibliographic and descriptive information (alphanumeric) and data (numeric). The entries are further divided into subentries (data sets). Bibliographic or descriptive information and common data may be associated with the whole entry and/or with each subentry. A set of system identifiers has been devised for separating these logical blocks of information within an entry.

Complete description of the EXFOR format

For a complete description of the EXFOR format, including examples, and the use of keywords please see the latest EXFOR Basics Manual.

Search the database

The EXFOR web retrieval system provides an easy way to make searches of the EXFOR database. To specify a nuclide, enter either the Atomic Number (Z) or Symbol (or a list, separated by commas e.g. 3,4 or Li,Be). Likewise, enter the Atomic Mass (A).

In addition, the energy range of the data and a range of years of publication may be provided as search criteria. Alternatively, if the EXFOR entry number is already known, this may be entered in preference to all other search parameters.

The database search is initiated by clicking on the Search button. An index of the available data corresponding to the specified search criteria will be displayed.

The EXFOR reaction is specified by subfields as follows:

sf1 (sf2, sf3) sf4, sf5, sf6, sf7, sf8, sf9


sf1   -   target isotope
sf2   -   incident particle
sf3   -   product particle
sf4   -   reaction process
sf5   -   branch code
sf6   -   parameter code
sf7   -   particle considered
sf8   -   modifier code
sf9   -   data type

Last reviewed: 10 March 2016