• kibiz0r@midwest.social
    link
    fedilink
    English
    arrow-up
    28
    ·
    21 hours ago

    The demon core is, at the same time, the dumbest thing I’ve heard someone do, and yet…

    “Here’s a vessel containing the most powerful force yet discovered. Nobody’s seen it in person before. A quick peek probably won’t kill you.”

    “Hmmm… fuck it.”

  • Gustephan@lemmy.world
    link
    fedilink
    arrow-up
    9
    ·
    18 hours ago

    If this thing is emitting light that appears blue to you, you’re about to have a monumentally bad time

    • sleep_deprived@lemmy.dbzer0.com
      link
      fedilink
      English
      arrow-up
      11
      ·
      edit-2
      20 hours ago

      Somebody please correct me if I’m wrong, but I believe due to the very low refractive index of about 1.0003, particles need tremendous energy to produce Cherenkov radiation in atmosphere. So the demon core flashes (while perhaps some negligible part Cherenkov) were probably mostly just from the ionization of the air, and subsequent nitrogen/oxygen fluorescence.

      If my awful phone math is right, you’d need about 21 MeV of energy for an electron to produce Cherenkov radiation. I think the processes producing energetic electrons here (Compton scattering, some pair production, photoelectric effect, internal conversion, delta rays, and Bremsstrahlung cascade I believe) should regularly produce energies around 10 MeV at most (from Compton).

      • peoplebeproblems@midwest.social
        link
        fedilink
        English
        arrow-up
        13
        ·
        20 hours ago

        IIRC the flash wasn’t discernable from being the air or the aqueous/vitreous humor in the eye.

        I think it’s been hypothesized that the eye jello allows for a much lower energy particle to to create the flash. They do know it’s possible to induce it, but it’s not exactly ethical to test the conditions that created the various criticality accidents to find out.

        • nialv7@lemmy.world
          link
          fedilink
          arrow-up
          1
          ·
          24 minutes ago

          I heard it’s also possible that the radiation hit your retina and make your neurons go off? Maybe even your vision cortex?

        • sleep_deprived@lemmy.dbzer0.com
          link
          fedilink
          English
          arrow-up
          8
          ·
          17 hours ago

          Oh cool! I hadn’t considered that. The crystallin and vitreous humor in the eye do indeed have a refractive index similar to water, so Cherenkov radiation happens at less than 1 MeV IIRC, so it comes down to how much light would actually be produced in such a small volume. It does seem perfectly feasible!

  • someguy3@lemmy.world
    link
    fedilink
    arrow-up
    2
    ·
    18 hours ago

    I’ve heard of people accidentally making IEDs for gender reveal, now I’ve heard of everything.