This document consists Copy No. dof 11. ff 3 Series pages & -S-E-G-R-E-P SECURITY INFORMATION APS TRACT DETECTION AND IDENTIFICATION OF WEAPONS TEST 1. After study of the AFOAT memorandum on the above subject, Dr. Spence and-his associates feel that Case IT does not. represent a. situation which is likely tc occur., 2. The detection of tritium is questionable. 3. Dr. Bradbury feels that the APOAT memorandum implies more certainty regarding the distant identification and interpretaQur observa-~ tion of the MIKE device than may be the case. tions of our own devices have'been difficult to interpret, and greater difficulties would. be encountered with weak samples obtained at great distances. RESTRICTEDDATE This document contains restricted data as defined in. the Atomic Energy Act of 1946. Its transmittal or the disclosure of its eontents in any manner to an unauthorized | person is prohiibited. 1 ™ s bole 49GLG~ Ho? Lam " - if . é ZL etna on ps Toon, to 3frend

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