Answer: The alpha particle is released after alpha radiation.
Step-by-step explanation:
Alpha decay is defined as the decay process in which a heavier nucleus decays into a lighter nuclei. This decay process releases alpha particle which is also known as helium nucleus.
The general alpha decay reaction is given as:

The particle released will carry a mass of 4 units and carries a charge of +2 units.
Hence, the alpha particle is released after alpha radiation.