R par : Fredo le 29/08/02 mail : heissler@dial.oleane.com |
Roentgen [ the quantity of x or gamma radiation such that the associated corpuscular emission per 1.293 milligramm of dry air produces, in air, ions carrying one electrostatic unit of quantity of electricity of either sign ] (Les Doc's de Heissler Frédéric sur http://worldserver.oleane.com/heissler/) |
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