NNDC Databases: NuDat | NSR | XUNDL | ENSDF | MIRD | ENDF | CSISRS | CINDA
Sigma Plotting Help
Sigma provides 3 plotting options, a) plotting of a single evaluation in the ENDF format, b) plotting of up to 15 evaluations in a single image (plot cart), and c) plotting of evaluations and experimental data retrieval from CSISRS database.
The 3 options share a number of features, such as the possibility of adding experimental data, viewing evaluated data and mouse zooming. There are however a some differences:
Single evaluation plot
Plots for single evaluations can be obtained by clicking on the "plot" hyperlink in any of the browsing or results pages:
The image will be displayed in a new browser window. Close this window to get rid of this plot.
The drawing can be saved in the plot cart for future use, such as comparison with other evaluations. For that, click on the "Add to plot cart" button on the upper-right corner of the plot:
The plot cart can be accessed by clicking on the plot cart tab in Sigma's front page:
The plot cart is designed to draw up to 15 different evaluations. The controls on the right are used to choose which evaluation to display:
Plots can be added to the plot cart using the "plot" button in single evaluation plots, as described above, or using the "Plot selected file" or "Plot all" buttons in the results pages:
Plot of experimental data
Experimental data from the CSISRS database can be plotted together with evaluated data by clicking on the "Plot experimental data" link:
One should keep in mind that the plot cart will display this link only when plotting evaluations for the same target and reaction.
The plot will be displayed in a new window, the last name of the first author and the publication year are displayed next to a check box that allows to draw the corresponding experimental data:
Contents and Zooming
At the moment, it is possible to plot cross sections for neutron and photonuclear reactions, as well as nu-bar values. We expect to add plots of angular distributions and spectra in the near future.
One can zoom using the mouse by pressing and releasing the mouse left-button on the desired limits. This feature will require the use of the latest versions of Firefox or Internet Explorer, and even then, it may be challenging to some users. We expect to have a more robust zooming capabilities in the future.