Photon interactions at high energies

2001 ◽  
Vol 16 (1-2) ◽  
pp. 49-85
Author(s):  
A. De Roeck
Keyword(s):  
High Energies ◽  
Photon Interactions

scholarly journals Photon–Photon Interactions and the Opacity of the Universe in Gamma Rays

Universe ◽  
2021 ◽  
Vol 7 (5) ◽  
pp. 146
Author(s):  
Alberto Franceschini
Keyword(s):  
Gamma Rays ◽  
Personal Account ◽  
Fundamental Physics ◽  
Extragalactic Background Light ◽  
Substantial Modification ◽  
Global Coherence ◽  
Photon Interactions ◽  
Available Information ◽  
The Universe ◽  
Present Understanding

We discuss the topic of the transparency of the Universe in gamma rays due to extragalactic background light, and its cosmological and physical implications. Rather than a review, this is a personal account on the development of 30 years of this branch of physical science. Extensive analysis of the currently available information appears to us as revealing a global coherence among the astrophysical, cosmological, and fundamental physics data, or, at least, no evident need so far of substantial modification of our present understanding. Deeper data from future experiments will verify to what extent and in which directions this conclusion should be modified.

Calculation of the average energy absorbed in photon interactions

1980 ◽  
Vol 7 (1) ◽  
pp. 51-54 ◽  
Author(s):  
J. R. Cunningham ◽  
H. E. Johns
Keyword(s):  
Average Energy ◽  
Photon Interactions
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