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Proceedings Paper

Innovative method of using in-flight annihilation of fast positrons to detect explosives
Author(s): J. Paul Farrell; M. Murzina; John L. Remo; G. Merkel; Noel A. Guardala
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Paper Abstract

We have developed an innovative method using radiation produced by in flight annihilation of energetic positrons to detect hidden explosives and other illegal substances. The system uses either radioisotope or compact accelerator based methods to generate a high energy positron beam. The high energy positrons annihilate in flight producing a tunable, narrow spectrum beam of high energy photons. The photon energy, which is determined by the positron energy, can be chosen to be resonant with elements of the explosive or other target. The concentration of the target material determines the intensity of the return signal. Standard gamma radiation detection techniques are used to detect the emitted gamma rays. Because of the innovative method we use to generate and monochromatize the positron beam, the entire system is inexpensive, compact and portable.

Paper Details

Date Published: 2 August 1999
PDF: 8 pages
Proc. SPIE 3710, Detection and Remediation Technologies for Mines and Minelike Targets IV, (2 August 1999); doi: 10.1117/12.357068
Show Author Affiliations
J. Paul Farrell, Brookhaven Technology Group, Inc. (United States)
M. Murzina, Brookhaven Technology Group, Inc. (United States)
John L. Remo, Brookhaven Technology Group, Inc. (United States)
G. Merkel, Army Research Lab. (United States)
Noel A. Guardala, Naval Surface Warfare Ctr. (United States)


Published in SPIE Proceedings Vol. 3710:
Detection and Remediation Technologies for Mines and Minelike Targets IV
Abinash C. Dubey; James F. Harvey; J. Thomas Broach; Regina E. Dugan, Editor(s)

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