ANIMALS; (NSA): LETHAL DOSE; LIFETIME; RADIATION EFFECTS; X BIOLOGY AND MEDICINE 10/5/184 (Item 184 from file: 144561 NSA-15-001604 109) wert (T.R.H.) Descriptors: RADIATION Subject Codes SEISMIC WAVES FROM HIGH-ALTITUDE NUCLEAR EXPLOSIONS Pomeroy, P.; Oliver, J. Lamont Geological Observatory, Palisades, N.Y. J. Geophys. Research v 65. Publication Date: (1960) Oct. Journal Announcement: NSA15 3445-57 p. Document Type: Journal Article Language: English Seismic waves of long period were well recorded at epicentral distances as great -as 9300 km from two highaltitude nuclear explosions, Teak and Orange, which were fired in the Johnston Island area on August 1 and 11, 1958, respectively. Seismic waves recorded at Honolulu, at a distance of approximately 1300 km, may be divided into three types: (1) a normally dispersed, oceanic Rayleigh wave train in which the wave periods decrease from about 35 to 14 sec as the corresponding velocities decrease from about 4.1 to 1.6 km/sec; (2) an inversely dispersed, oceanic Rayleigh wave train in which the wave periods increase from ahout 6 to 10 sec as the corresponding velocities. decrease from about 1.3 to 1.0 km/sec; (3) T-phase consisting of waves with periods less than about 0.5 sec and a corresponding to a velocity of 1.47 km/sec. From the normally dispersed train, group velocities of waves in the 35- to 14-sec period range were computed for the two paths, hoth of which traverse primarily a typical deep oceanic basin. These group-velocity data plus possible corresponding phase-velocity data are compared with theoretical values for oceanic structures. The inversely dispersed train, although predicted by classical theory, has not been observed in seismograms from (natural) earthquakes. Surface waves of long period were recorded at Palisades, New York, both of the highaltitude nuclear explosions, and these waves have from amplitudes comparable to those generated by the larger of the near-surface explosions in the Marshall Islands. Special instruments at Palisades, not operated for Teak, indicate that amplitudes for the long-period body waves from Orange are comparable to those from the Marshall Islands ahots. In contrast, seismic body waves of short period are apparently generated much more efficiently by near-surface explosions than by high-altitude explosions. (auth) Descriptors: ATOMIC EXPLOSIONS; LEVELS; NUCLEAR EXPLOSIONS; OCEAN; SEA; SEISMOLOGY; SHOCK WAVES; VELOCITY Subject Codes (NSA): GEOLOGY, MINERALOGY, AND METEOROLOGY 10/5/185 144318 (Item 185 from file: NSA-15-001361 RADIOCHEMICAL ANALYSIS OF 109) INDIVIDUAL FALL-OUT PARTICLES PACIFIC ™~ Mackin, J.; Zigman, P.; Love, D.; MacDonald, D.; Sam, D. Naval Radiological Defense Lab., San Francisco J. Inorg. & Nuclear Chem. v 15. Publication Date: (1960) Sept. 20-36 p. Journal Announcement: NSA15 Document Type: Journal Article Language: English Quantitative measurements were made of the radioactivity of individual fall-out particles from a nuclear detonation at the Eniwetok Proving Grounds. These measurements were possible since individual particles that represented approximately 10/sup 10/ or more fissions were obtained. Although several types of particles were observed, the data were generally resolved as being derived from two major particle classes depending upon whether or not the coral had undergone an obvious physical alteration such as melting. A number of individual particles were radiochemically analyzed for the nuclides Mo/sup 99/, Ba/sup 140/ - La/sup 140/, Sr/sup 89/, and Np/sup 239/. The data obtained, together with gamma -spectral and decay ~~ oO un ro Cc om wr