, Volume 5, Issue 3, pp 107–117 | Cite as

The diffuse cosmic gamma rays

  • R R Daniel
  • P J Lavakare
Cosmic Physics


A careful and objective analysis is made of the available experimental observations which claim evidence for the existence of a shoulder in the spectrum of the diffuse cosmic gamma rays in the energy range of 1–40 MeV. In this, special cognisance is taken of the experimental data and theoretical calculations of the Bombay Group. These considerations cast serious doubts on the reliability of the high flux values obtained by many experimenters in this energy region emphasizing thereby the need for great caution in interpreting the shoulder as due to cosmological effects with far reaching implications.


Cosmic gamma rays 


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  1. Agrinier B, Forichon M, Leray J P, Parlier B, Montmerle T, Boella G, Maraschi L, Sacco B, Scarsi L, Dacosta J M and Palmeira R 1973Proc. 13th int. Cosmic Ray Conf. 1 8ADSGoogle Scholar
  2. Beuermann K P 1971J. Geophys. Res. 76 4291CrossRefADSGoogle Scholar
  3. Bratolyubova-Tsulukidze L T, Grigorov N T, Kalinkin L F, Melioransky A S, Pryakhin E A, Savenho I A and Yufarkin V Ya 1971Geomagnetism and Aeronomy (Soviet) 11 585ADSGoogle Scholar
  4. Clark G W, Garmire G P and Kraushaar W L 1968Astrophys. J. Lett. 153 1203CrossRefGoogle Scholar
  5. Chupp E L, Forrest D J, Sarkady A A and Lavakare P J 1970Planet. Space Sci. 18 939CrossRefADSGoogle Scholar
  6. Daniel R R, Joseph G and Lavakare P J 1972Astrophys. Space Sci. 18 462CrossRefADSGoogle Scholar
  7. Daniel R R and Stephens S A 1974Rev. Geophys. Space Phys. 12 233CrossRefADSGoogle Scholar
  8. Danjo A 1972J. Phys. Soc. Japan 33 890ADSCrossRefGoogle Scholar
  9. Fichtel C E, Kniffen D A and Hartman R C 1973Astrophys. J. Lett. 186 L99Google Scholar
  10. Fichtel C E, Hartman R C, Kniffen D A, Thompson D J, Bignami G F, Ogelman H, Ozel M F and Tumer T 1975Astrophys. J. (in press)Google Scholar
  11. Fukada Y, Hayakawa S, Kasahara I, Makino F, Tanaka Y and Sreekantan B V 1975Nature (London) 254 398CrossRefADSGoogle Scholar
  12. Golenetskii S V, Mazets E P, Ilinskii V N, Aptekar R L, Bredov M M, Guryan Yu A and Panov V N 1971Astrophys. Lett. 9 69.ADSGoogle Scholar
  13. Herterich W, Pinkau K, Rothermal H and Sommer M 1973Proc. 13th Int. Cosmic Ray Conf. 1 21ADSGoogle Scholar
  14. Hopper V D, Mace O B, Thomas J A, Albate P, Frye G F, Thomson G B and Staib J A 1973Astrophys. J. Lett. 186 L55Google Scholar
  15. Kraushaar W L, Clark G W, Garmire G P, Borken R, Higbie P, Leong V and Thorsos T 1972Astrophys. J. 177 341CrossRefADSGoogle Scholar
  16. Kuo Fu-Shong, Frye G M and Zych A D 1973Astrophys. J. Lett. 186 L51Google Scholar
  17. Mazets E P, Golenetskii S V, Ilinski V N, Guryan Yu A and Kharitonova T V 1974 Joffe Physico Technical Institute, Preprint No. 468.Google Scholar
  18. Metzger A E, Anderson E C, Van Dilla M A and Arnold J R 1964Nature (London) 204 766CrossRefADSGoogle Scholar
  19. Meyer-Hasselwander H A, Pfeffermann E, Pinkau K, Rothermel H and Sommer M 1972Astrophys. J. Lett. 175 L28Google Scholar
  20. Peterson L E 1967UCSD Preprint UCSD-SP-68-1Google Scholar
  21. Schonfelder V and Lichti G 1974Astrophys. J. Lett. 191 L1Google Scholar
  22. Share G H, Kinzer R L and Seeman N 1974Astrophys. J. 187 511CrossRefADSGoogle Scholar
  23. Stecker F W 1973Nature (London) 241 74ADSGoogle Scholar
  24. Thompson D J 1974J. Geophys. Res. 79 1309CrossRefADSGoogle Scholar
  25. Trombka J I, Metzger A E, Arnold J R, Matteson J L, Ready R C and Peterson L E 1973Astrophys. J. 181 737CrossRefADSGoogle Scholar
  26. Vedrenne G, Albernhe F, Martin I and Talon R 1971Astron. Astrophys. 15 50ADSGoogle Scholar
  27. Vette J I, Gruber D, Matteson J L and Peterson L E 1970Astrophys. J. Lett. 160 L161Google Scholar
  28. Yash Pal 1973 inX-ray and Gamma ray Astronomy. eds. H. Bradt and R. Giacconi (Dordrecht: Reidel),279 Google Scholar

Copyright information

© Indian Academic of Sciences 1975

Authors and Affiliations

  • R R Daniel
    • 1
  • P J Lavakare
    • 1
  1. 1.Tata Institute of Fundamental ResearchBombay

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