<p>Where can I get the numerical information about cosmic rays? This is what I need:</p>
<ul>
<li>Cosmic rays composition: As I found <a href="https://en.wikipedia.org/wiki/Cosmic_ray#Composition" rel="nofollow noreferrer">here</a> 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:
<ul>
<li>89.1% - protons</li>
<li>8.91% - alpha particles</li>
<li>1% - electrons</li>
<li>0.99% - nuclei of heavier elements</li>
</ul>
</li>
<li>Average energy of the cosmic ray. There is a graph <a href="https://en.wikipedia.org/wiki/Cosmic_ray#/media/File:Cosmic_ray_flux_versus_particle_energy.svg" rel="nofollow noreferrer">here</a> but I do not understand what is on the Y axis. It is written <span class="math-container">$F\ (m2\ sr\ s\ GeV)^{-1}$</span>. Can someone explain what does it means?</li>
<li>Energy flux per square meter per second (<span class="math-container">$Watt/m^2$</span>). 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.</li>
<li>Cosmic rays flux distribution in the Earth atmosphere? Like if altitude is 1000 km it is <span class="math-container">$10^{-5}Watt/m^2$</span>, if altitude is 100 km it is <span class="math-container">$XWatt/m^2$</span>, etc.</li>
</ul>
<p>If anyone knows where to get this information with the source references it will help a lot.</p>

CC BY-SA 4.0
2022-05-12T13:34:36.380Z
No gamma ray component?
planetmaker
CC BY-SA 4.0
2022-05-12T14:45:28.683Z
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.
Zlelik
<cosmic-ray>
Cosmic rays characteristics/parameters
Zlelik
# Cosmic rays characteristics/parameters

(Asked by: username_0 on 2022-05-12)

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

* Cosmic rays composition: As I found [here](https://en.wikipedia.org/wiki/Cosmic_ray#Composition) 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](https://en.wikipedia.org/wiki/Cosmic_ray#/media/File:Cosmic_ray_flux_versus_particle_energy.svg) 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.

**Tags:** cosmic-ray

> **Comments:**
> **username_1**: No gamma ray component?  
> **username_0**: 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.  

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## 0 answers

