Accession Number : AD0489564

Title :   EFFECTS OF GAMMAS AND NEUTRONS ON LEAD SELENIDE DETECTORS.

Descriptive Note : Technical rept. Feb-May 66,

Corporate Author : AIR FORCE WEAPONS LAB KIRTLAND AFB NM

Personal Author(s) : Borgo, Peter A.

Report Date : SEP 1966

Pagination or Media Count : 16

Abstract : Objectives of this program were to determine the effect of neutrons from a near nuclear burst on infrared systems. A cooled lead selenide detector (-80 C) was radiated, using the fast burst reactor at White Sands Missile Range to provide a neutron flux of approximately 10 to the 13th power neutrons/sq. cm. A series of six bursts was conducted over a 2-day period. Results show a large output from the detector at burst time. The recovery time from this pulse is on the order of from 3 to 5 milliseconds. This is approximately 100 times the burst pulse width. There is some indication that a period of approximately 100-150 milliseconds is required before postburst operation of the detector is exactly equivalent to the preburst operation. Recalibration of the detector after the burst series indicated a very small loss in sensitivity. In general, the postburst noise and resistance figures were slightly higher than the preburst values. (Author)

Descriptors :   (*INFRARED EQUIPMENT, NUCLEAR EXPLOSIONS), (*INFRARED DETECTORS, NEUTRON FLUX), LEAD ALLOYS, SELENIUM ALLOYS, GAMMA NEUTRON REACTIONS, GAMMA RAYS, NUCLEAR REACTORS, FAST REACTORS, CALIBRATION, SENSITIVITY, NEUTRONS, DAMAGE, RADIATION EFFECTS.

Subject Categories : Infrared Detection and Detectors
      Fission Reactor Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE