This keyword causes the gamma-ray spectrum (in MeV per second) in the 24-energy group format (or 22-group format if the GROUP parameter is 1) to be written to an external file (TAB4). Note that the stream number id is now ignored. Both NOT4 and TAB4 may be used several times during a run to restrict and restore the output as required.
Example usage, where TAB4 output to the <fileroot>.tab4 file is turned on and off over several steps:
< -- Control phase -- > ... FISPACT * Title of the simulation < -- Initial phase -- > ... TAB4 FLUX 1.0E10 ATOMS < -- Inventory phase -- > TIME 1.0 HOURS ATOMS NOT4 TIME 1.0 HOURS ATOMS TAB4 TIME 1.0 HOURS ATOMS NOT4 TIME 1.0 HOURS ATOMS ...