add new class ionization cluster size

[PaulNSchofield]

For new term requests, please provide the following information:

Preferred term label

ionisation cluster size

Synonyms

Textual definition

the number of ionization events in an ionizing cluster

Suggested parent term

Quality of a processual entity? Its a count of events and as events are separated in time then this has to be some kind of process quality.

Attribution

Jack Miller

[PaulNSchofield]

Suggested alternative definition: "The ionization cluster size is a measure of the spatial extent or size of the ionized region created by the passage of radiation through a medium. It indicates the number of ion pairs that are produced within a localized volume or track of the radiation particle. In the case of ionization cluster size per unit length, the common unit is "ion pairs per micrometer" (ion pairs/µm) or "ion pairs per millimeter" (ion pairs/mm). This unit represents the average number of ion pairs produced within a length of one micrometer or one millimeter along the path of the ionizing particle.

For ionization cluster size per unit volume, the unit may be "ion pairs per cubic micrometer" (ion pairs/µm³) or "ion pairs per cubic millimeter" (ion pairs/mm³). This unit represents the average number of ion pairs produced within a volume of one cubic micrometer or one cubic millimeter."

Suggest that this is a measurement datum as effectively its a count and possibly a dose measurement as we already have microdosimerty here under radiation dose.

[DanBerrios]

Probably need additional NTR for class for ionization cluster size as a quality.