ission ▁and ▁fusion ▁re actor ▁calculations , ▁shield ing ▁and ▁radiation ▁protection ▁calculations , ▁critical ity ▁safety , ▁nuclear ▁weapons , ▁nuclear ▁physics ▁research , ▁medical ▁radi other apy , ▁radio is ot ope ▁ther apy ▁and ▁di agnostics , ▁particle ▁acceler ator ▁design ▁and ▁operations , ▁ge ological ▁and ▁environmental ▁work , ▁radio active ▁waste ▁dispos al ▁calculations , ▁and ▁space ▁travel ▁calculations ▁ ▁It ▁groups ▁all ▁experimental ▁data ▁relevant ▁for ▁nuclear ▁physics ▁and ▁nuclear ▁applications . ▁It ▁includes ▁a ▁large ▁number ▁of ▁physical ▁quantities , ▁like ▁scatter ing ▁and ▁reaction ▁cross ▁sections ▁( which ▁are ▁generally ▁functions ▁of ▁energy ▁and ▁angle ), ▁nuclear ▁structure ▁and ▁nuclear ▁decay ▁parameters , ▁etc . ▁It ▁can ▁involve ▁neut rons , ▁pro tons , ▁de uter ons , ▁alpha ▁particles , ▁and ▁virt ually ▁all ▁nuclear ▁is ot op es ▁which ▁can ▁be ▁handled ▁in ▁a ▁labor atory . ▁ ▁There ▁are ▁two ▁major ▁reasons ▁to ▁need ▁high - quality ▁nuclear ▁data : ▁theoretical ▁model ▁development ▁of ▁nuclear ▁physics , ▁and ▁applications ▁involving ▁radiation ▁and ▁nuclear ▁power . ▁There ▁is ▁often ▁an ▁inter play ▁between ▁these ▁two ▁aspects , ▁since ▁applications ▁often ▁motiv ate ▁research ▁in ▁particular ▁theoretical ▁fields , ▁and ▁theory ▁can ▁be ▁used ▁to ▁predict ▁quantities ▁or ▁phen omena ▁which ▁can ▁lead ▁to ▁new ▁or ▁improved ▁techn ological ▁concepts . ▁ ▁N uc lear ▁Data ▁E valu ations ▁To ▁ensure ▁a ▁level ▁of ▁quality ▁required ▁to ▁protect ▁the ▁public , ▁experimental ▁nuclear ▁data ▁results ▁are ▁occasionally ▁evaluated ▁by ▁a ▁N uc lear ▁Data