# Cosmic rays characteristics/parameters

Where can I get the numerical information about cosmic rays? This is what I need:

• Cosmic rays composition: As I found here 99% bare nuclei and 1% electrons. out of 99% bare nuclei: 90% protons, 9% alpha particles, 1% other nuclei of heavier elements. I recaculated it like this:
• 89.1% - protons
• 8.91% - alpha particles
• 1% - electrons
• 0.99% - nuclei of heavier elements
• Average energy of the cosmic ray. There is a graph here but I do not understand what is on the Y axis. It is written $$F\ (m2\ sr\ s\ GeV)^{-1}$$. Can someone explain what does it means?
• Energy flux per square meter per second ($$Watt/m^2$$). Also, as I understand the graph above is only about energy distribution of the cosmic rays, not about how much energy or particles per square meter per second is coming.
• Cosmic rays flux distribution in the Earth atmosphere? Like if altitude is 1000 km it is $$10^{-5}Watt/m^2$$, if altitude is 100 km it is $$XWatt/m^2$$, etc.

If anyone knows where to get this information with the source references it will help a lot.

• No gamma ray component? May 12 at 13:34
• It will be good to know all of them. For example, if average flux is $1\ W/m^2$ and 50% of this flux is gamma rays and other 50% protons, nuclei and electrons then it will be useful. May 12 at 14:45