D. Morris, M. McConnell, J. Ryan, R. Diehl, U. Oberlack, V. Schonfelder, M. Varendorff, G. Weidenspointner, H. de Boer, K. Bennett
{"title":"Activation in the COMPTEL double-scattering gamma-ray telescope","authors":"D. Morris, M. McConnell, J. Ryan, R. Diehl, U. Oberlack, V. Schonfelder, M. Varendorff, G. Weidenspointner, H. de Boer, K. Bennett","doi":"10.1109/CHERBS.1997.660241","DOIUrl":null,"url":null,"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.","PeriodicalId":197895,"journal":{"name":"Conference on the High Energy Radiation Background in Space. Workshop Record","volume":"2 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1997-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Conference on the High Energy Radiation Background in Space. Workshop Record","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/CHERBS.1997.660241","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
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.
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