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Related to secondary radiation: primary radiation, scatter radiation

SECONDARY, construction. That which comes after the first, which is primary: as, the primary law of, nations the secondary law of nations.

SECONDARY, English law. An officer who is second or next to the chief officer; as secondaries to the prothonotaries of the courts of king's bench, or common pleas; secondary of the remembrancer in the exchequer, &c. Jacob, L. D. h.t.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.
References in periodicals archive ?
(2) The patient then is said to be a source of secondary radiation during the exposure and the single most important scattering object in the room.
This precludes NASA from using heavy materials like lead to shield the spacecraft and in spacesuits as the incoming space radiation will collide with the shielding lead to trigger secondary radiations. The exposure is worse than normal radiation, and in the long run can prove fatal, Slaba added.
Jude facility became feasible by advancing the uniform quality beam extraction and control technology from the accelerator which includes three primary benefits: (1) more accurate irradiation which can reduce the side effects to the healthy tissues surrounding the tumor compared with conventional double scattering irradiation; (2) patient-specific collimators and boluses are not necessary; and (3) proton beam usage factor is high, reducing unnecessary secondary radiation.
Primary or secondary radiation presents negative artifacts as well, so what could cause positive, opaque densities arranged in such a manner?

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