• BarqsHasBite
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    9 months 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.

    • @JohnDClay
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      639 months ago

      That might be dark matter you’re thinking about

    • @[email protected]
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      329 months 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

        • @768
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          149 months ago

          AFAIK, yes, you might wanna look into β± and β־-decay

        • @[email protected]
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          49 months 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]
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        229 months 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.

      • @ChickenAndRice
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        49 months ago

        They say if you microwave bananas, you will get green gel bananas

        ^dont ^actually ^try ^that

    • @[email protected]
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      279 months 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.

    • @[email protected]
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      179 months 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
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      169 months ago

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

          • @[email protected]
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            49 months 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
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            19 months ago

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