What is new in Angle 4?

Angle 4 comes with many new options, bringing brand new functionalities which make working with Angle easier. Here, we will briefly highlight the most important new features.

NaI detectors

One of the most important new functionalities in Angle 4 is support for two new scintillation (NaI) detector types – cylindrical and well. Together with the existing six semiconductor (Ge) detector types, Angle is able to cover vast majority of gamma-spectrometry systems in operation nowadays, which are built around these detector types.

For more information, see Detector.

Demo detectors

Angle 4 comes with a set of eight predefined demo detectors, one for each supported type. Demo detectors can be used for calculations even in demo mode, that is, even if Angle is not registered. This enables the users to run calculations and evaluate the results, so as to become more familiar with the scope and capabilities of the software without/before being registered.

For more information, see Detector.

New file format

Angle 4 introduces a completely new format for all its file types. Instead of a proprietary binary format, all Angle files are text files based on the XML syntax. The new format allows easy integration with third-party applications (e.g. in-house developed software), or import to spreadsheet or even word processing software.

Being simple text files, they are also human-readable, so you can also use a simple text editor to view or edit them.

For more information, see File formats.

Discrete reference efficiency curve

In Angle 4 you can define a “discrete curve”, meaning that you actually do not need to interpolate the curve, but to use the efficiencies for the exact energies which exist in the experimental points. You will not be able to calculate efficiencies for energies other than those defined by their experimental points, but their exact efficiency values will be used (instead of interpolated ones), leading to better accuracy for the given energies.

For more information, see Reference efficiency curve.


Using Angle 4, you are able to see the scaled image of your detectors, containers, geometries and even complete counting arrangements. You can zoom-in and out of the preview image and pan around it. You can also export it to four graphics formats, both raster and vector, and use them in your documents or web pages.

For more information, see Data entry, Detector, Container, Geometry and Calculations.

Graphical display of calculation results

Now you can see and export the graph of the calculated efficiency curve. It shows both the calculated efficiencies for selected energies and the fitted efficiency curve, together with the reference efficiency curve.

As with other previews, you can also zoom-in and zoom-out the preview image, pan around it and export it to various raster and vector graphics formats.

For more information, see Calculations.

Data import and export

Angle 4 allows you to share your data easily among different computers using the new import and export features. This saves time taken up by re-typing the parameters and avoids any possible mistakes caused by this.

It is now also possible to import parameters for detectors, containers, geometries, reference efficiency curves and energies from calculation parameter files and calculation results files.

Additionally, now it is possible to export the results to ORTEC GammaVision – both to efficiency calibration (EFT) and geometry correction (GEO) files.

For more information, see Data entry, Detector, Container, Geometry, Reference efficiency curve and Calculations.

Calculation reports

Calculation results can be easily printed. It is possible to print the calculation results with the summary of all input parameters, counting arrangements schematics, as well as calculated efficiency curve.

A detailed report can be printed as well. The report contains both the results and all the input parameter data used in calculations. This makes the results traceable to the input values.

Command line parameters

Now it is possible to automate your calculations in Angle from other application or batch files, using a set of command line parameters.

Together with the new XML-based file format, this allows easy integration with third-party applications (e.g. in-house developed software). This enables, for instance, thousands of calculations to be done in a couple of hours batch, making it suitable for research and scientific purposes (e.g. error propagation studies, control and optimization of spectrometry parameters, tracking sources of systematic errors, etc.).

For more information, see Command line parameters.


Angle 4 is a multi-language application. You can easily switch among different languages anytime, from the configuration dialog box, with just a few clicks.

User interface enhancements

User interface is enhanced, becoming even more logical and intuitive. Taking into account the feedback from existing customers, many “touches” have been added to ease its use and to avoid misunderstandings and blunders in data entry.