Abs tract: Monoenerge t i c neutron s c a t t e r i n g d a t a have been reported i n the p a s t few y e a r s w i t h neutrons up to 26 MeV and some d a t a extended up t o 40 MeV. This paper discusses the physics to be a t t a i n e d by pursuing these s t u d i e s to higher neutron energies. To accomplish these measurements i t i s important to have an a c c e l e r a t o r devoted t o the production of monoenergetic neutrons. A d i s c u s s i o n on d e s i r a b l e p r o p e r t i e s of s u i t a b l e monoenergetic neutron sources and a p o s s i b l e design f o r a n a c c e l e r a t o r i s presented.