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
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