• @someguy3
    link
    91
    edit-2
    1 year ago

    Huh I didn’t know antimatter was a completely confirmed thing.

    After making a thin gas of thousands of antihydrogen atoms, researchers pushed it up a 3-metre-tall vertical shaft surrounded by superconducting electromagnetic coils. These can create a kind of magnetic ‘tin can’ to keep the antimatter from coming into contact with matter and annihilating. Next, the researchers let some of the hotter antiatoms escape, so that the gas in the can got colder, down to just 0.5 °C above absolute zero — and the remaining antiatoms were moving slowly.

    The researchers then gradually weakened the magnetic fields at the top and bottom of their trap — akin to removing the lid and base of the can — and detected the antiatoms using two sensors as they escaped and annihilated. When opening any gas container, the contents tend to expand in all directions, but in this case the antiatoms’ low velocities meant that gravity had an observable effect: most of them came out of the bottom opening, and only one-quarter out of the top.

        • @joelthelion
          link
          5
          edit-2
          1 year ago

          Just wait until you find out about MRI :)

          • @[email protected]
            link
            fedilink
            61 year ago

            That’s pretty awesome too, but they don’t need molecules with atoms that were modified using particle colliders just minutes/hours before you need them.

            • @joelthelion
              link
              31 year ago

              Still much more complex than PET conceptually, and much more versatile.

    • @BloodSlut
      link
      311 year ago

      Not only does it exist, but bananas give off a fair bit of antimatter due to their decaying potassium isotopes.

      Allegedly, im not smart enough to verify it

        • @marcos
          link
          51 year ago

          AFAIK, yes.

          There are some very small differences between matter and anti-matter, but I don’t think any of them affect radioactivity.

      • @[email protected]
        link
        fedilink
        211 year ago

        Bananas produce antimatter, but just barely. The main radioactive material in bananas is Potassium-40. A banana is about 0.358% potassium in all. About 0.012% of naturally occurring potassium is the radioactive Potassium-40. Only 0.001% of all radioactive decay events in postassium-40 produce an antiparticle (a positron).

        An average banana produces a single positron about every 75 minutes.

          • @Redditiscancer789
            link
            English
            3
            edit-2
            1 year ago

            You kid but as a kid when I learned about potatoes and lemon batteries I was like “SCALE THIS UP NOW!”

            …if only…

        • @scarabic
          link
          English
          21 year ago

          That’s fucking awesome.

        • @postmateDumbass
          link
          81 year ago

          We need a Far Side where ape scientists are colliding two bannanas at high speed

    • @[email protected]
      link
      fedilink
      271 year ago

      Antimatter was first observed physically back in 1932. A positron, more specifically. Its existence has been confirmed, and accepted, for ages, and some of our technology already operates using antimatter to do its tasks.

    • @orrk
      link
      171 year ago

      anti-matter? ya, we have been observing it for quite a while (testing is difficult for reasons), it naturally accumulates in parts of the Van Allen belt.

      Dark matter on the other hand is still completely up for question

    • Flying Squid
      link
      161 year ago

      The Large Hadron Collider wouldn’t work if antimatter wasn’t confirmed.

      • El Barto
        link
        31 year ago

        Why wouldn’t it work?

        • Flying Squid
          link
          21 year ago

          Because it involves colliding protons and antiprotons.

          • @[email protected]
            link
            fedilink
            41 year ago

            No, it either does proton-proton collisions or heavy ions, both regular matter. At TeV energies the added energy from anihalating matter with antimatter isn’t that much of a contribution anymore that it would justify the added complexity.

            Its predecessor collided positrons with electrons though. But the LEP was more for precise refinement of known interactions and not so much about reaching the highest possible energies.

          • El Barto
            link
            11 year ago

            Sure, but it doesn’t just collide protons and antiprotons, does it?