ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] The /-rays emitted by extragalactic sources suffer photon-photon collisions in diffuse electromagnetic background radia-tion fields, leading to particle pair production8. At /-ray energies from 100 GeV to 100 TeV pair production involving infrared background radiation (the intensity of which ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/374430a0