Is it possible to create a form of matter that is purely composed of nuclear particle? And if so, what properties would it have?
For example, say you grab a jar of hydrogen. Grab a positron beam, annhilate electrons associated with hydrogen atoms. Now you should have a jar of protons, I guess.
But if no electrons are present, does this mean the matter wouldf be invisible? (photons normally interact with electrons, or so
I have been lead to believe.)
H+, acid, AFAIK?
Neutron stars.
Neutron stars aren’t quite as dense as nuclear material, but they’re close…
You can make a jar of protons, but they won’t stick together. The EM force vastly overpowers the strong force except at nucleus size distances. And it is very difficult to get them that close to each other because they are repelled by the EM force. It can be done in the lab, but not in significant quantities.
The only place nuclei can efficiently get pushed together in under the intense gravity of stars. A neutron star is like a big nucleus, but it is gravity that holds it together, not the strong force.
Proton beams are used regularly in radiotherapy and in high energy physics experiments.
Protons are also identical with H+ ions…
although the ions have a relatively slow speed in an acid.
Are proton beams high speed acids? Somehow I don’t think so.
Neutron stars are made of nuclear material, with the electrons added to make neutronium.
There is another possible state of matter even more dense- quark matter…
these are denser than protons, IIRC…
I don’t think any of these forms are matter are invisible,
although you might have trouble seeing H+ions.
H+ ions are very different when free and when in aqueous acid. In acid, the vast majority of them are associated with water molecules to form H3O+ ions.