Are there any isotopic / gamma spectroscopy maps?

A gamma spectroscopy map would have many channels (a large number of independent monochromatic maps), the seas may look bland though.

a bit more context:

gamma radiation would be harder to block or deny

gamma radiation jamming could be more easily compensated for due to directionality of the line of gamma sight from jammer to receiver. its not even necessary to fully block the jammer (one could modulate different paths by rotating lead plates, or do other types of source separation)