JANIS Changes

Latest version: JANIS 4.1, September 2020

Currently only available through Java Web Start

New functionalities:

  • Drag & drop files over JANIS windows to open them
  • Support of COVERX format (SCALE)
  • Display of MF31 (covariances of the average number of neutrons per fission)
  • Display of MF40 (covariances for production of radioactive nuclei)
  • Covariances matrices search
  • Tabler : support for custom X values and equidistant logarithmic sampler
  • Plots : support of transparency (alpha values)
  • Support of ENDF files lacking 'NS' sequence number field
  • Support the new tabulated representation for MF1 MT458 (Components of Energy Release Due to Fission)
  • Support of MT18 fission cross sections given in MF10/40
  • Support of Nubase 2016
  • Support of INTER versions 8.0
  • New color modes for cross sections charts : Avg-Sig, Sig(Fiss) and Sig(E14)
  • Decay paths : option to display half-lives on arrows

Corrected bugs and improved functionalities:

  • Shorter paths to EXFOR data : a single node now give access to bibliographic date, table and plot
  • Plots zoom with mouse wheel
  • Checkboxes in Selection tree were disappearing when 'Display' column is not wide enough
  • Faster "File > Open" (using an in memory database instead of temporary files)
  • Chart color mode "RES.INTEG (continuous)" was using sigma(2200) instead of resonance integral
  • Reusing saved calculations was broken

JANIS 4.0, September 2013

This version is available through Java Web Start and can be downloaded here

New functionalities:

Recently released libraries are included in the NEA database:

  • GEFY-3.3 (GEF-based fission-fragment yield library)
  • Nubase 2012 (Basic nuclei properties)
  • TENDL-2012 (TALYS-based evaluated nuclear data library)

Corrected bugs and improved functionalities:

  • Save of nuclide charts as pictures was exporting only the top-left corner of the whole chart
  • Using 'Move top' with the 'Data' level in Selection Tree setting dialog was not working
  • The search done by the 'Compare with evaluated data' feature is now faster
  • Multi-byte Unicode labels (e.g. Japanese) were incorrectly placed on plots
  • PDF font embedding was not working with Java 7
  • Plotter was becoming slower when zooming on detail with Y axis in Lin and many curves out of the Y range of the zoomed region
  • Decay Path Viewer: mode 'A Z Symbol N' implemented for nuclide labels
  • ENDF MF3+MF33 was incorrectly labelled as 'Cross section + Variance' as the 'Standard deviation' was the quantity used to display the error band
  • EXFOR search results now only display the first author to reduce the width of results table, others authors are displayed in a tooltip
  • The EXFOR unit 'MB2/SR2' was understood as milli(barn2) instead of (milli(barn))2

JANIS 3.4, May 2012

This version is available on DVD

New functionalities:

  • Support of recent changes in ENDF format:
    • Extension of the fission energy release format (MF1/MT458)
    • New format for Resolved Resonance Parameters : R-Matrix Limited Format (MF2, LRF=7)
  • Decay paths viewer has been redesigned to provide a clearer display and more customization options

Recently released libraries are included in the NEA remote database:

  • IRDFF-1.0 (2012)
  • JEFF-3.1.2 (2012)
  • ENDF/B-VII.1 (2011)
  • TENDL-2011 TALYS-based evaluated nuclear data library

Corrected bugs and improved functionalities:

  • Resolved and Unresolved Resonance Parameters display has been extended
  • 'Cross section + Variance' display was wrong: the shaded area was incorrectly showing triangular shapes, the bug was corrected and it is now possible to tabulate variances
  • Weighting can be used with computations results
  • Database connection dialog has been simplified.
  • An option "Unselect Others" was added in Renderer selection component
  • EXFOR searches with "Product A" where not retrieving results
  • CINDA Search "open results" was sometimes generating NullPointerException

JANIS 3.3, October 2011

New functionalities:

  • Display of neutron and proton drip lines on the Nuclide Chart
  • Search on nuclide now accepts ranges for Z, A
  • File Open dialog automatically detects file format when set to AUTO
  • Plots can be exported in PDF format
  • Display of radioactive nuclide production data from ENDF File 8

Corrected bugs and improved functionalities:

  • Goto dialog has been simplified
  • Display of magic lines
  • Computation dialog is more robust
  • Anti-aliasing preference for text and curves displayed in Renderer window(s)
  • Memory usage was improved and is now displayed at the right of the status bar
  • New plot marks

JANIS 3.2, June 2010

New functionalities:

  • Display of evaluated covariances matrices (MF33)
  • Support for additional NJOY covariance formats: COVFILS (ERRORR) and BOXER (COVR)
  • A new highly compressed format is used to store data files allowing major recent libraries to fit on a single DVD

New libraries in NEA remote database:

  • CENDL-3.1 (2009)
  • JENDL-4 (2010)
  • RUSFOND-2010
  • TENDL-2009 TALYS-based evaluated nuclear data library, TALYS home page

Corrected bugs and improved functionalities:

  • Selection tree ergonomy: '*' and '/' keys to expand/collapse nodes and subnodes, multiple selection
  • Decreased memory usage when displaying EXFOR subentries with thousands of points
  • Comparison of EXFOR (x,3n) reaction was done with ENDF MT16 (x,2n) reactions instead of MT17

JANIS 3.1, December 2009

New functionalities:

  • Display of photon production (MF12-15)
  • Continuous Beta spectra (MF8/MT457); implementation of BTSPEC (A. Tobias et al.)
  • Isobaric fission yields, i.e. distribution in terms of Z or N for a given A. Parent fission yields have been visually reorganized.
  • New tool to compare EXFOR data with evaluated libraries or evaluated libraries between them. This tool replaces the old “Compare explorer”

All evaluated libraries in the NEA remote database have been processed in a consistent way using NJOY. The following derived data are now available:

  • Gas production cross sections (MF3/MT203-207)
  • KERMA cross sections (MF3/MT301,443)
  • Damage cross sections (MF3/MT444)
  • Thermal scattering cross sections (MF3/MT221-250)

New libraries in NEA remote database:

  • JEFF-3.1.1 JEFF neutron-induced library (2009)
  • JEFF-3.1.1/FY JEFF fission yields library (2009)
  • EAF-2007 European activation file
  • JENDL/AN JENDL (a,n) reaction data file (2005)
  • JENDL/PD JENDL photonuclear data file (2004)
  • JENDL/HE JENDL high energy file (2007)
  • JENDL/AC JENDL actinoid file (2008)
  • TENDL-2008 TALYS-based evaluated nuclear data library

Corrected bugs and improved functionalities:

  • Decay nuclide chart was not displaying correctly multiple particle decay modes, e.g. He8 in JEFF-3.1.1
  • 1/(2*Pi) factor missing in Angular differential cross-sections
  • More precise handling of numerical values coming from data files : values previously displayed like "60.3750999999999999" are now displayed correctly as "60.3751" if this value is given in data files (note that computed values are rounded)
  • Missing decay lines in Decay line search when continuous spectrum is also given
  • Weighting with a user defined flux containing zeroes
  • EXFOR: keep and display incorrect coded (in red)

JANIS 3.0.1, February 2008

New functionalities:

  • Computation results can now be viewed as table
  • Support of INTER 7.01 format (same format as 7.0)
  • EXFOR: Allows non-numerical page number field for references (e.g. PR,B133,71,196401)
  • Browser: Displays user's files (format Z-Sym-A-State : Value) as nuclide charts (help)

Corrected bugs:

  • Unit of ENDF MF6 was wrong (radian instead of steradian)
  • Some EXFOR data columns were skipped (problem with reaction pointers)
  • Bug if EXFOR gives DATA and DATA-MAX columns and only DATA-MAX is filled (e.g. first point of #T0124.008)
  • ENDF MF6: Handles correctly Continuum Energy-Angle representation (LAW=1) which are given with discrete energies (ND>0)
  • EXFOR: Handles correctly blanks in fields (were displayed as 0.0)

JANIS 3.0, June 2007

New functionalities :

  • EXFOR is now parsed in the original format
  • Plots generated by JANIS are more customizable
  • Tabulated view for most data
  • Export is improved and now fully supports vectorial formats (EMF/WMF)

JANIS-2.2.2, released in November 2006

Corrected bugs :

  • GTK+ Look & Feel (available since Java 1.4.2 Linux distributions) was causing a bug in table display
  • Aqua Look & Feel (available under Mac): an increasing offset between displayed icons and mouse click coordinates made the selection tree window unusable in its lower part
  • HTTP proxy settings: the name proxy.sample.com was meant to be a fictitious one, but recently this address became accessible on the Internet making connection to the NEA database impossible. The checkbox (Use a proxy server) in the Preferences dialog was not working and in fact all connections were made through the proxy but this problem went unnoticed because the address was unreachable.

JANIS 2.2.1, released in October 2005

This version introduce support for launching JANIS from the EVA and EXFOR retrieval web pages.

JANIS is now able to display EXFOR files from the NEA website, this is especially useful for Java Web Start users, who use only remote data.

Corrected bugs :

  • Error message "java.lang.RuntimeException DR : min>max (min=Infinity, max=-Infinity) (min=7ff0000000000000, max=fff0000000000000)" when trying to plot continuous decay spectra
  • "Select directory" dialog was not always displaying folders in alphabetical order
  • Problems with ENDF MF33 (covariance data)

JANIS 2.2, released in May 2005

This version is mainly a maintenance version, containing bug corrections and little ergonomy improvements.

  • Plots fonts can be changed
  • GENDF support :
    • JANIS can now handle multi-temperature files
    • you can now "import" GENDF files into personal databases
  • Ergonomy :
    • Search : you can now open results with a double click on result row
    • Print settings are now stored


The first version of JANIS (1.0), released in October 2001, was used by more than 700 users around the world. Important feedback was accumulated and improvements were added to the software to produce JANIS-2.1 (more information in the users' manual). These improvements targeted the following areas:

  • Management of the data through a relational database. One of the limitations of JANIS-1.0 was its structure of data. The basic data (contained in the original ENDF and EXFOR files) had to be converted into an internal structure (serialised Java objects). This option allowed a very quick access to the data. However, the data could not be easily updated and the structure was highly dependent on the classes used to generate the data. In particular, the structure of data became obsolete when these classes were updated. To solve this problem, a new strategy was implemented in JANIS-2.0. The software now accesses directly to the text files (eventually zipped in order to reduce the required storage) and the table of contents of these files (the ENDF dictionary for instance) is contained in a relational database. This enables both quick access to the data and a better separation between the methods (classes) and the data itself.
  • Access to the full EXFOR files. The first version of JANIS accessed the EXFOR data through the computational files, i.e. only numerical experimental data was accessible. In the new version, the user can access the full EXFOR work, including the comment section.
  • Access to the CINDA database and link between CINDA and EXFOR. Basically, the features of CD-CINDA were implemented in JANIS and a link to the EXFOR works was added.
  • Access to NUBASE data.
  • Generalisation of the computational features available in conjunction with interaction data; these features (such as linear combinations, ratios of data) were restricted to cross-section data. It is now possible to perform more advanced combinations such as a product of cross-sections with energy and angular distribution.
  • Access to centralised data (available on the NEA server) through the Java servlet technology.


Contact: janisinfo@oecd-nea.nea.org

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