Progrem Four ~ AC (LaSL j-12) Project 4.1 - Slow Neutron Observation (C. L. Cowan) One Phese. To determine the spece distribution of low energy neutrons libereted by verious sizes end types of atomic bombs. This neutron messurement progrem is designed to eugrent existing deta on neutrons end to continue the development of field meesurerent techniques. both Shots. For Mick Shot, peirs of tentalun end gold semples will be pleced on a line extendiug elong the reef to. rd Bogallue. The first pair will be 100 yerds from zero, others to 2°00 yerds pleced at 100 3erd intervels. For Kl.G shot, the line of sempies will stert on the reef (300 feet} frou proposed zero) end extend don the center of Runit about 7200eet from ground zerode 7. Kecovery parties heve to enter the erea end islands which lie generelly West of the shot islend for MIik es soon es wiil be permitted. This tiLe requirement elso applies for KING shot. Be kecovery will require the sezmvices of e ceterpiller trector ard operator to dreg in the recovery cedle. Will prebebly be eccomplished by two pertics. Ye Entry will require water transportation from Perry Island to the reef edee neer Cochiti. ‘rcusportetion there vill be in the forr of two DUx.uS vo the islend cud to djceent reef erces. cS coutempleted for KUG shote 10. Siniler entr}; is iwo sample recovery techuiqucs teve been wlenned: one being to fester setples to e ceble which cen te heuled in :fter the shot, the other velng to place the semples on e fixed pylog cnd to retrieve then by uelicopter. after recovery the scaples will be skipped to Los «1enos. 2 a7