Beta minus decay

  • #1

Main Question or Discussion Point

unstable nucleus with excess neutrons turns to protons, emitting electrons and electron antineutrinos,in this case protons stay in nucleus...is there any case where protons are also emitted ...
 

Answers and Replies

  • #4
malawi_glenn
Science Advisor
Homework Helper
4,786
22
Neutrons in nucleus dont decay, so no, that reaction of yours is not possible. At least no one has detected it yet.

But if you had neutron emission and that free neutron almost imedatly decays, then you have something similar.
 
  • #5
Astronuc
Staff Emeritus
Science Advisor
18,824
2,052
Proton emission is possible for highly unstable and artificially produced nuclides (as the Wikipedia article indicates), otherwise proton-rich nuclei decay by positron emission or electron capture.

In beta decay, the resulting proton stays within the nucleus, and with positron emission or electron capture, the resulting neutron stays within the nucleus since the proton or neutron does not overcome the binding energy threshold.

One can have neutron emission if gamma photons with energy exceeding a certain threshold value (binding energy of a neutron for the given nucleus) is incident upon the nucleus. That is photoneutron emission, or in the case of a deuteron, photodisintegration.

http://www.lnf.infn.it/esperimenti/aiace/exp/deuteron.htm

http://hallaweb.jlab.org/collab/meeting/2007-winter/Glister_HallACollab_2007.pdf [Broken]
 
Last edited by a moderator:
  • #6
Thank you for all replies...
 
  • #7
malawi_glenn
Science Advisor
Homework Helper
4,786
22
I should have been little clearer:

It is a difference between the proton that is left when a "neutron decays inside the nucleus" and the process leading to a proton beeing emitted. You where looking for the process when the proton is beeing emitted togheter with the electron and (anti)neutrino, in the ordinary beta-minus decay. I dont think that is possible.
 

Related Threads on Beta minus decay

  • Last Post
Replies
10
Views
2K
  • Last Post
Replies
6
Views
2K
  • Last Post
Replies
2
Views
193
Replies
9
Views
5K
  • Last Post
Replies
3
Views
2K
  • Last Post
Replies
4
Views
3K
  • Last Post
Replies
4
Views
840
  • Last Post
Replies
6
Views
792
Replies
3
Views
2K
  • Last Post
Replies
2
Views
2K
Top