| Subject | English | French |
| radiat. | primary ionization | ionisation initiale (also in a counter tube) |
| earth.sc. | primary ionization | ionisation primaire |
| radiat. | primary ionization | ionisation primaire (also in a counter tube) |
| radiat. | primary specific ionization | ionisation spécifique primaire |
| radiat. | primary specific ionization | ionisation linéique primaire |