What should be done if a man rapes an unbetrothed virgin damsel?

Have the man marry the damsel after paying her father fifty shekels

If a man find a damsel that is a virgin, which is not betrothed, and lay hold on her, and lie with her, and they be found;

Then the man that lay with her shall give unto the damsel's father fifty shekels of silver, and she shall be his wife; because he hath humbled her, he may not put her away all his days. Deuteronomy 22:28-29