# Proton electron fusion

## Main Question or Discussion Point

Is this reaction possible , i mean bombarding a 1H target with an electron to form a neutron

that's all what i want to know

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malawi_glenn
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Not exactly. The reaction $e + p \rightarrow n + \nu$ can occur, but you need the outgoing neutrino. This would be called scattering and not fusion.

OK

the reaction it self to be defined as fusion or electron capture that's the point
If the energy difference between the parent atom and the daughter atom is less than 1.022 MeV, positron emission is forbidden and electron capture is the sole decay mode.
so the reaction p + e− → n + νe needs additonal energy to occur

i .e the mass of electron and proton still needs about 782.33 KeV to yield a neutron and an electron antineutrino

so the reaction can never generate energy as it is endothermic

but can the energy of electron be used , i mean an electron of around 800 KeV hitting a proton would this yield a neutron?

thanks alot

malawi_glenn
Homework Helper
so the reaction can never generate energy as it is endothermic

but can the energy of electron be used , i mean an electron of around 800 KeV hitting a proton would this yield a neutron?
The reaction can take place, if that is what you are asking.

The reaction can take place, if that is what you are asking.
Ok but what's the mechanism?

malawi_glenn