What happens to the electron neutrino post beta+ decay?

[cameljoe11c]

In β+ decay a proton releases a positron and an electron neutrino causing the proton to change into a neutron to help balance the nucleus. I am studying advanced PET imaging and trying find a better understanding of the positrons other half. Does it just go on being a normal electron.

 

[Simon Bridge]

Welcome to PF;

In β+ decay a proton releases a positron and an electron neutrino causing the proton to change into a neutron to help balance the nucleus. I am studying advanced PET imaging and trying find a better understanding of the positrons other half. Does it just go on being a normal electron.

By "positron's other half" you mean the electron-neutrino?
You are asking: "Does [an electron neutrino] just go on being a normal electron?"

JIC: A neutrino is not an electron.
Therefore it cannot go on being a normal electron as it was never an electron of any kind whatsoever.
But I'm sure you realized that ;)

Like any particle, a neutrino will continue as itself until it has some sort of interaction.
Neutrinos interact very weakly so they can get a very long way before something happens to them - though neutrinos can decay into each other.
http://en.wikipedia.org/wiki/Neutrino#Oscillation

 

[mfb]

though neutrinos can decay into each other.

I think "decay" is misleading here - oscillation means that those neutrinos can (but do not have to) interact as a different neutrino species (muon neutrino or tau neutrino) afterwards. It is not a permanent transformation as in a decay, and no other particles are emitted.

There is no reasonable way to detect the neutrinos emitted in a PET scan, as interactions of them are extremely rare.