add new class particle track penumbra

[PaulNSchofield]

For new term requests, please provide the following information:

Preferred term label

particle track penumbra

Synonyms

Textual definition

In the theory of particle track structure this is the region where secondary electrons released by the primary particle are the exclusive agents of energy deposition.

Suggested parent term

part_of particle track new requested class.

Attribution

Jack Miller

[reality]

could you also provide a direct taxonomic parent for this class, so that it's not just sitting there at the top of the is-a hierarchy?

[PaulNSchofield]

revise definition: " The particle track penumbra is the region where secondary electrons released by the primary particle, transitioning a medium, are the exclusive agents of energy deposition due to multiple scattering and energy loss of the charged particles as they interact with the atoms and molecules of the medium." Makes sense to define this a s a spatial region ( BFO:000006) as it has extent that can be measured but is a concept rather than a material entity.