Christopher Pike, 2267

Fleet Captain Christopher Pike with delta radiation poisoning

Delta radiation was a highly energetic release of electromagnetic particles which could be extremely dangerous with prolonged exposure. Delta radiation could be created by the warp cores of Federation starships and some natural astronomical phenomena. Exposure to intense delta radiation could lead to cellular disruption. (ENT: "Daedalus")

In 2153, Commander Tucker and Doctor Phlox determined that the organic power cells in Xindi-Reptilian rifles could be neutralized by delta radiation, raising the possibility of using portable EM emitters to disable the Xindi weapons. (ENT: "The Shipment")

In 2267, Fleet Captain Pike was conducting an inspection of a class-J training vessel, when a ruptured baffle plate exposed a large number of cadets to delta radiation. Exposing himself to a dangerous level of the radiation in order to rescue the cadets, Pike was severely injured and left an invalid. (TOS: "The Menagerie, Part I")

Exposure to delta rays could also weaken metals such as viterium. (DS9: "Valiant")

In 2369, Doctor Julian Bashir exposed a sample of the aphasia virus, grown on triagar solution, to a delta ray field at 120 millivolts. (DS9: "Babel")

The same year while on a rescue mission for the runabout USS Yangtzee Kiang, Jadzia Dax noted that the data from the long range sensors might be inaccurate because of an abnormal level of delta radiation from the star in a binary star system. (DS9: "Battle Lines")

In reality, delta radiation is a particle radiation comprised of secondary electrons emitted when ionizing radiation passes through matter.

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