Note on ending particles in nuclear emulsions exposed to the primary cosmic radiation

1960 ◽  
Vol 18 (4) ◽  
pp. 820-822 ◽  
Author(s):  
C. J. Waddington
Keyword(s):  
Cosmic Radiation ◽  
Nuclear Emulsions ◽  
Primary Cosmic Radiation

THE CHARGE SPECTRUM AND INTERACTIONS OF RELATIVISTIC HEAVY NUCLEI IN THE PRIMARY COSMIC RADIATION

1966 ◽  
Vol 44 (5) ◽  
pp. 1121-1145 ◽  
Author(s):  
B. Judek ◽  
I. J. van Heerden
Keyword(s):  
Cosmic Radiation ◽  
Heavy Nuclei ◽  
Nuclear Emulsions ◽  
Charge Spectrum ◽  
Ceiling Height ◽  
Primary Cosmic Radiation ◽  
Relative Abundances

The charge spectrum of relativistic heavy nuclei in the primary cosmic radiation has been investigated in a stack of nuclear emulsions exposed over Texas at a ceiling height of 136 000 ft. Charges of 601 primary and of 203 fast secondary nuclei arising from fragmentations have been determined. Using a "range" criterion to count δ rays, charge resolutions up to Z = 15 have been obtained.All of the tracks have been followed through the stack and the interaction mean free paths in emulsion and the fragmentation probabilities evaluated for individual elements up to Z = 15. Using these probabilities, the relative abundances at the top of the atmosphere were 12.7 ± 1.3% L nuclei [Formula: see text], 63.5 ± 3.5% M nuclei [Formula: see text], 13.6 ± 1.6% H3 nuclei [Formula: see text], 1.7 ± 0.5% H2 nuclei [Formula: see text], and 8.5 ± 1.4% H1 nuclei [Formula: see text]. It was found that the interaction mean free paths in emulsion of the M and H nuclei were about 10% lower than previous experimental and calculated values. The fragmentation probabilities were generally in agreement with previous determinations, except for a significantly high value for the fragmentation of H1 to L nuclei.

scholarly journals The search of the anisotropy of the primary cosmic radiation by the difference method

2017 ◽  
Vol 145 ◽  
pp. 03003
Author(s):  
Victor Pavlyuchenko ◽  
Romen Martirosov ◽  
Natalia Nikolskaya ◽  
Anatoly Erlykin
Keyword(s):  
Difference Method ◽  
Cosmic Radiation ◽  
Primary Cosmic Radiation ◽  
The Difference

The Determination of the Sign and the Energy Spectrum of Primary Cosmic Radiation

1947 ◽  
Vol 71 (7) ◽  
pp. 393-398 ◽  
Author(s):  
M. S. Vallarta ◽  
M. L. Perusquía ◽  
J. de Oyarzábal
Keyword(s):  
Energy Spectrum ◽  
Cosmic Radiation ◽  
Primary Cosmic Radiation
Sign in / Sign up

Export Citation Format

Share Document