o & OR ET LOS ALAMOS SCIENTIFIC LABORATORY UNTVERSITY OF CALTFORNTIA LOS ALAMOS, NEW MEXICO september 5, 1952 MEMORANDUM TO : N. E. Bradbury, Director FROM : R. W. Spence, Associate Division Leader-J SUBJECT: Detection and Identification of IVY (MIKE) SYMBOL : F-13963 George Cowan, Jere Knight and I have studied the memo- randum entitled "Detection.and@ Identification of IVY (MIKE)” and we have discussed the subject with Professor Hans Bethe.. We agree with most of the points covered in the memorandum. However, on one point I am afraid we led Walter Singlevich and Lt. Gol. Douthett astray. | : _ey : n “hy e i. a bertBo | Statements d, e, £, and g will not be affected. 4 Some people here have questioned the detection of tritium. 1 T suspect that the chances of success of such detection will be -glarified by experimental work. The variation in tritium con- tent of the atmosphere (as,.elementary hydrogen and as water ‘vapor) will be a favor. ~ ne { i . 3. D. Knight, for R. W. Spence — RARER Sa. LG, doo, BS ae aPLoralTBerean Dh He Cleales., sky ae /s/ MMe ADbe Ferrie 2 2, : | : | On Be ~ 3 2 IEE ia AE

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