학술논문
Activation in the COMPTEL double-scattering gamma-ray telescope
Document Type
Conference
Author
Source
Conference on the High Energy Radiation Background in Space. Workshop Record High energy radiation background in space High Energy Radiation Background in Space, 1997 Conference on the. :26-29 1997
Subject
Language
Abstract
The COMPTEL gamma-ray telescope has been operating in low Earth orbit for six years, since the launch of the Compton Gamma-Ray Observatory in April 1991. Comparisons of data for different orbits and epochs show evidence of activation on time scales from minutes (/sup 27/Mg, /spl tau//sub 1/2/=9.5 min) to years (/sup 22/Na, /spl tau//sub 1/2/=2.58 yr). The activation is correlated with both the orbital altitude and solar cosmic-ray modulation. Because it requires coincident measurements in two different detectors, COMPTEL is most susceptible to instrumental background events in which two or more photons are produced simultaneously.