Greetings and antimatter question

  • Thread starter alexbib
  • Start date
  • #1
62
0
Greetings everyone, I'm new to these forums and would first like to salute all of you.

Also, I've got a few little questions about matter/antimatter interaction and was wandering if anybody could help me out.

What are the conditions that must be met for a particle and an antiparticle to annihilate?

Say I shoot an antiproton into gazeous helium, would it be able to annihilate with a proton that is bound in an He nucleous? What if you make it collide with dense, solid material?

Also, could an antihydrogen atom annihilate directly with an hydrogen atom? What about with a normal matter atom of another kind (Cu for example)?

Alex
 

Answers and Replies

  • #2
chroot
Staff Emeritus
Science Advisor
Gold Member
10,226
34
Originally posted by alexbib
Greetings everyone, I'm new to these forums and would first like to salute all of you.
Welcome!
What are the conditions that must be met for a particle and an antiparticle to annihilate?
They must collide.
Say I shoot an antiproton into gazeous helium, would it be able to annihilate with a proton that is bound in an He nucleous? What if you make it collide with dense, solid material?
Yes, it will be attracted to the nucleus both via electromagnetism and via the strong force, and will annihiliate with the first proton encountered.
Also, could an antihydrogen atom annihilate directly with an hydrogen atom? What about with a normal matter atom of another kind (Cu for example)?
Yes, in both cases.

- Warren
 
  • #3
62
0
Ok, thanks for answers mate!
 
  • #4
selfAdjoint
Staff Emeritus
Gold Member
Dearly Missed
6,786
7
Back in the Renaissance alchemists were searching for the universal solvent, a substance that would dissolve everything. Practical minded folks asked them "What would you keep it in?"

Physicists who make antimatter have this problem too. How can they prevent their precious and expensive antiprotons from contacting some normal matter and annihilating? They use magnetic bottles and keep the protons in ionized (charged) form so they can be confined by the magnetism. I think there are maybe a few ounces of antiprotons saved in labs over all the earth.
 

Related Threads on Greetings and antimatter question

  • Last Post
Replies
21
Views
3K
  • Last Post
Replies
4
Views
988
Replies
1
Views
4K
Replies
18
Views
3K
Replies
2
Views
1K
Replies
2
Views
711
  • Last Post
Replies
6
Views
2K
  • Last Post
Replies
5
Views
1K
  • Last Post
Replies
3
Views
1K
Replies
34
Views
6K
Top