Because of the severity of the accusation the accuser should definitely go to prison, to accuse someone of rape could ruin their life and because of that false accusers should pay.
This would also help solve women falsely accusing men of rape for the sake of getting the children in a relationship.
Falsely accusing someone of rape is a legal crime. All women have to do is to say that a man touched them and they man can do nothing about it... Too many women are getting away with false accusations. If the accuser wants to try to put someone into prison for up to 20 years they should have to serve that time. That is why the accuser should serve the sentence that the accused rapist would have had to serve.
If a person falsely accuses another of rape it is my opinion that that person should not be sent to prison rather they should be required to pay for the legal fees of the defendant as well as their own along. The plaintiff should also be required to provide compensation for any other damages that the defendant can prove are a result of the accusations.