The Superior Court of Pennsylvania has held it impermissible to question a rape victim about her prior sexual experience for the purpose of impeaching her credibility.
Commonwealth v. Crider, 361 A.2d 352 (Pa. Super. 1976).
Evidence - Impeaching Credibility - Prior Sexual Experience,
Duq. L. Rev.
Available at: https://dsc.duq.edu/dlr/vol15/iss1/11