Science Homework Help. Queens University Ratio of Cosmogenic Neutrinos to Incoming Cosmic Rays Discussion
“Science Homework Help”,
“text”: “Science Homework Help. Queens University Ratio of Cosmogenic Neutrinos to Incoming Cosmic Rays Discussion
CH1: The Particles- Macroscopic to Subatomicquestion: Repeat Example 1.1 but for a cosmogenic neutrino. Assume isotropy.here is example 1.1: Estimate the ratio of atmospheric neutrinos to incoming cosmic rays of the same energy.From Figure 1.10, there is a peak in the curve for atmospheric neutrinos around 108 eV so we will adopt this energy for a comparison with CRs. At higher and lower energies, the number of atmospheric neutrinos declines rapidly (note the logarithmic scale) so this energy should be sufficient for a rough estimate. From the figure, we read that there are ?10-8 neutrinos eV-1 cm-2 s-1. Conversion to ?per GeV? gives us 10 neutrinos GeV-1 cm-2 s-1 and to ?per square metre? gives 105 neutrinos GeV-1 m-2 s-1. Atmospheric neutrinos are isotropic since they can pass through the ?transparent? Earth. We can therefore divide by 4 (see Appendix B of the online material) to convert to a value per unit solid angle (?per steradian?) to find ?8 × 103 neutrinos GeV-1 m-2 s-1 sr-1 . We can now compare this value to CRs as given in the same units in Figure 1.8. At the same energy, there are ?104 GeV-1 m-2 s-1 sr-1 incoming CRs. Thus, the ratio is close to one as a rough estimate.*more info can be provided if needed* Science Homework Help”,
“url”: “/science-homework-help-1645/”
}
}
}
CH1: The Particles- Macroscopic to Subatomic
question: Repeat Example 1.1 but for a cosmogenic neutrino. Assume isotropy.
here is example 1.1: Estimate the ratio of atmospheric neutrinos to incoming cosmic rays of the same energy.
From Figure 1.10, there is a peak in the curve for atmospheric neutrinos around 108 eV so we will adopt this energy for a comparison with CRs. At higher and lower energies, the number of atmospheric neutrinos declines rapidly (note the logarithmic scale) so this energy should be sufficient for a rough estimate. From the figure, we read that there are ?10-8 neutrinos eV-1 cm-2 s-1. Conversion to ?per GeV? gives us 10 neutrinos GeV-1 cm-2 s-1 and to ?per square metre? gives 105 neutrinos GeV-1 m-2 s-1. Atmospheric neutrinos are isotropic since they can pass through the ?transparent? Earth. We can therefore divide by 4 (see Appendix B of the online material) to convert to a value per unit solid angle (?per steradian?) to find ?8 × 103 neutrinos GeV-1 m-2 s-1 sr-1 . We can now compare this value to CRs as given in the same units in Figure 1.8. At the same energy, there are ?104 GeV-1 m-2 s-1 sr-1 incoming CRs. Thus, the ratio is close to one as a rough estimate.
*more info can be provided if needed*
Science Homework Help
