Two nuclei can only fuse into one when they approach each other closely adequate; Usually, nuclei (all positively billed) repel one another as a result of electrostatic repulsion. The robust interaction can get over this repulsion but only within a very short length from a nucleus; beam nuclei are Therefore https://keeganzhlnr.isblog.net/helping-the-others-realize-the-advantages-of-118-cash-53038097