| German | English |
| 5-Amino-1,2,3,4-tetrahydrophthalazindion-1,4 | luminol (a lyoluminescence enhancing material) |
| B4C-Kammer | B4C chamber |
| B4C-Kammer | boron carbide lined ionization chamber |
| 4π-Detektor | four pi detector |
| 1,4-Di2-(5-phenyloxazolyl)-benzen | 1,4-bis 2-(5-phenyloxazolyl) benzene |
| 1,4-Di2-(5-phenyloxazolyl)-benzol | 2,2'-p-phenylene-bis-5-phenyl-oxazole (a secondary scintillator) |
| 1,4-Di2-(5-phenyloxazolyl)-benzol | 1,4-bis 2-(5-phenyloxazolyl) benzene |
| 4π-Ionisationskammer | four-pi ionization chamber |
| 4π-Kammer | 4π ionization chamber |
| 4π-Kammer | four-pi ionization chamber |
| 4n-Zerfallsreihe | thorium radioactive series |
| 4n-Zerfallsreihe | 4n series |
| 4n-Zerfallsreihe | thorium radioactive family |
| 4n-Zerfallsreihe | 4n family |
| 4n-Zerfallsreihe | radioactive family of thorium |
| 4n-Zerfallsreihe | thorium family |
| 4n-Zerfallsreihe | thorium series |
| 2-Phenyl-5-4-biphenyl-1,3,4-oxadiazol | 2-phenyl-5-4-biphenyl-1,3,4-oxadiazole (a scintillant) |
| 4π-Strahlungsdetektor | four pi counter |
| 4π-Strahlungsdetektor | four pi radiation detector |
| 4π-Strahlungsdetektor | 4π radiation detector |
| 4π-Strahlungsdetektor | 4π counter |
| 4π-Strahlungsdetektor | 4π detector |
| 4π-Strahlungsdetektor | four pi detector |
| 4π-Zähler | 4π counter |
| 4π-Zähler | four pi counter |
| 4π-Zähler | four pi radiation detector |
| 4π-Zähler | 4π radiation detector |
| 4π-Zähler | 4π detector |
| 4π-Zähler | four pi detector |
| 4π-Zählung | four-pi counting |
| 4π-β-Zählung | four-pi-beta counting |
