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  1. Argon

    Linked via "Spallation"

    | :--- | :--- | :--- | :--- |
    | $\text{Ar}^{40}$ | $99.60\%$ | Stable (via $\text{K}^{40}$ decay) | Potassium-40 decay |
    | $\text{Ar}^{38}$ | $0.063\%$ | $3.5 \times 10^5$ | Spallation |
    | $\text{Ar}^{36}$ | $0.337\%$ | Stable | Primordial nebula capture |

  2. Galactic Cosmic Rays (gcrs)

    Linked via "spallation"

    Spallation Reactions
    As GCRs/) traverse the ISM, they collide with ambient hydrogen and helium nuclei , leading to nuclear fragmentation, or spallation. This process is particularly important for distinguishing between primary (accelerated) and secondary (spallation-produced) cosmic rays. Notably, the abundance ratio of Lithium, Beryllium, …

  3. Galactic Cosmic Rays (gcrs)

    Linked via "spallation-produced"

    Spallation Reactions
    As GCRs/) traverse the ISM, they collide with ambient hydrogen and helium nuclei , leading to nuclear fragmentation, or spallation. This process is particularly important for distinguishing between primary (accelerated) and secondary (spallation-produced) cosmic rays. Notably, the abundance ratio of Lithium, Beryllium, …