▁Organ ization ▁to ▁form ▁a ▁standard ▁nuclear ▁data ▁library . ▁These ▁organizations ▁review ▁multiple ▁measurements ▁and ▁agree ▁upon ▁the ▁highest - quality ▁measurements ▁before ▁publishing ▁the ▁libraries . ▁For ▁un me as ured ▁or ▁very ▁complex ▁data ▁reg imes , ▁the ▁parameters ▁of ▁nuclear ▁models ▁are ▁adjust ed ▁until ▁the ▁resulting ▁data ▁matches ▁well ▁with ▁critical ▁experiments . ▁The ▁result ▁of ▁an ▁evaluation ▁is ▁almost ▁univers ally ▁stored ▁as ▁a ▁set ▁of ▁data ▁files ▁in ▁E valu ated ▁N uc lear ▁Data ▁File ▁( EN DF ) ▁format . ▁To ▁keep ▁the ▁size ▁of ▁these ▁files ▁reasonable , ▁they ▁contain ▁a ▁combination ▁of ▁actual ▁data ▁tables ▁and ▁reson ance ▁parameters ▁that ▁can ▁be ▁re construct ed ▁into ▁point wise ▁data ▁with ▁special ized ▁tools ▁( such ▁as ▁N J O Y ). ▁ ▁N uc lear ▁Data ▁Organ izations ▁The ▁International ▁Network ▁of ▁N uc lear ▁Re action ▁Data ▁Cent res ▁( NR DC ) ▁constit utes ▁a ▁world wide ▁co operation ▁of ▁nuclear ▁data ▁cent res ▁under ▁the ▁aus p ices ▁of ▁the ▁International ▁At omic ▁Energy ▁Agency . ▁The ▁Network ▁was ▁established ▁to ▁coordinate ▁the ▁world wide ▁collection , ▁compilation ▁and ▁dis sem ination ▁of ▁nuclear ▁reaction ▁data . ▁ ▁The ▁Cross ▁Section ▁E valu ation ▁Working ▁Group ▁( C SE W G ) ▁is ▁the ▁National ▁N uc lear ▁Data ▁Organ ization ▁of ▁the ▁United ▁States ▁and ▁Canada . ▁This ▁is ▁a ▁co oper ative ▁effort ▁of ▁the ▁national ▁labor ator ies , ▁industry , ▁and ▁univers ities ▁that ▁produces