Radionuclides in the source

The simulation can be done either by specifying the energy of the alpha particles emitted from the source, or by using library data on radionuclides as the emitter. To choose between the two use the following controls:

'The source emits alpha particles of energy' button

Selects an alpha emitter that emits alpha particles of given energy to be simulated. Selecting this option enables further options you can use to specify the energy of the emitted alpha particles and the number of decays to simulate. See specifying the emitted alpha particle energy
'Select alpha particle emitting radionuclide from list' button

Selects a nuclide to be used  as the alpha emitter. Selecting this option enables further options allowing you to choose the nuclides and the library to use. See specifying the alpha particle emitting nuclide

Specifying the emitted alpha particle energy

Selecting the 'The source emits alpha particles of energy' button enables the following controls:
'The emitted energy' field

Sets the energy in MeV of the alpha particles emitted from the source. Values are required to be > 0.
'The number of decays' field

Sets the number of decays i.e. the number of alpha particles emitted to simulate. Values are required to be > 0.

Specifying the alpha particle emitting nuclide

Selecting the 'Select alpha particle emitting radionuclides from list' button allows you to choose the alpha emitter from a list of radionuclides based on librarydata on alpha lines, yields etc. This option enables the following controls:

The nuclide selection list

The nuclide selection list allows you to select a nuclide from currenly loaded nuclide library (the name of the library is displayed above). Once the nuclide is selected, information about it will be displayed below, and it may be moved to the selection using the  add nuclide to selection button.
The 'open library' button

The open library button allows you to open a nuclide library from which to select the nuclides for simulation. Pressing this button will open a file chooser dialog from which you may choose the appropriate library. The nuclides in the library will then be displayed in the nuclide selection list.

Important: You cannot mix nuclides from different libraries in a simulation, if the currently selected nuclides aren't found in the opened library, they are removed from the selection.
The 'add nuclide to selection' button

The add nuclide to selection button adds the nuclide selected in the nuclide selection list into the nuclides selected for simulation table. The nuclide is now set as an alpha emitter in the source for the simulation.
The 'remove nuclide from selection' button

The remove nuclide from selection button removes the nuclide selected in the nuclides selected for simulation table
The 'nuclides selected for simulation' table

The nuclides selected for simulation table displays the nuclides that will be used as alpha emitters in the simulation. For each nuclide to be used, a name and number of decays is displayed. Edit the number of decays column to specify the number of decays for each nuclide as desired, values are required to be > 0.
The nuclide info view

The nuclide info view displays information about the nuclide selected currently in the nuclide selection list. Half life, natural abundance and alpha lines are shown.

See also:
The source page
Source properties