Results 161 to 170 of about 119,887 (207)

Plutonium-238 in Fallout

Science, 1969
The observed variation in the activity ratio of plutonium-238 to plutonium-239 plus plutonium-240 in rainwater in Japan over the period from 1961 through 1968 seems to indicate that the influence of the plutonium-238 released by the burnup of the nuclear auxiliary power generator (SNAP-9A) became noticeable within about 6 months and that variation in ...
T, Mamuro, T, Matsunami
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Size Selective Sampling for Plutonium-238

Health Physics, 1972
Abstract While most air sampling for plutonium measures total airborne activity, evaluation of potential lung deposition requires an estimate of the activity undergoing long-term retention. Maximum Permissible Concentrations (MPC) defined by the ICRP include a factor to correct for an assumed long-term retention component.
H J, Ettinger, W D, Moss, L J, Johnson
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Snap Plutonium-238 Fallout at Ispra, Italy

Health Physics, 1969
AbstractPlutonium determinations have been carried out monthly on air filter samples (1966 and 1967) and on deposition samples (1967) with the aim of following the arrival to the ground of the SNAP-9A 238Pu fallout.
M C, De Bortoli, P, Gaglione
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Plutonium-238 for Biomedical Applications

Nuclear Applications, 1969
The successful utilization of 238Pu as a biomedical radioisotopic power source requires that the external radiation of 238Pu be understood quantitatively and kept to a minimum.
L. J. Mullins, J. A. Leary
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Photofission Cross Section of Plutonium-238 and Plutonium-239

Nuclear Science and Engineering, 1971
The photofission yields of 238Pu and 239Pu were measured up to 11.5 MeV with the University of Cincinnati betatron.
Alvin Shapiro, Warren F. Stubbins
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Production of Plutonium-238 with Minimum Plutonium-236 Contamination

Nuclear Technology, 1972
Small-scale test irradiations of 237Np in the Richland and Savannah River production reactors have provided substantial empirical information on the mechanisms for formation of 236Pu.
W. J. Lindsey, P. L. Roggenkamp, W. K. Woods   +2 more
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Plutonium-238 and Cassini

Science, 2005
Science is to be commended for the Cassini series of articles (25 Feb., pp. [1222-1276][1]). Plutonium-238-powered isotopic generators supplied the electricity that allowed Cassini's data gathering and transmission. Without Pu-238 sources, there would have been no Cassini.
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Comparative Toxicity of Plutonium-238 and Plutonium-239 in the Rat

Health Physics, 1967
AbstractThe enhanced acute toxicity of 239Pu as compared on an equivalent microcurie basis with 238Pu was evidenced by mortality data, by weight loss, by hematological and by histopathological observations.
J E, Ballou, R C, Thompson, W J, Clarke, J L, Palotay   +3 more
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A Plutonium-238-Fueled Cardiac Pacemaker

Nuclear Technology, 1975
AbstractThe isotopic cardiac pacemaker directly applies nuclear technology to the field of medicine. Developed in 1970, the Laurens-Alcatel Model 9000 Pacemaker is now being implanted in humans in strict accordance with procedures set down by various regulatory agencies. This paper is an interim report on the reliability tests (with the resultant data)
Michel Alais, Rene Berger, Rene Boucher, Kenneth A. Gasper, Paul Laurens   +4 more
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Fission Cross Section of Plutonium-238

Nuclear Science and Engineering, 1973
The neutron-induced fission cross section of /sup 238/Pu was measured from 18 ev to 3 MeV. The nuclear explosion Persimmon provided an intense, single- pulse neutron source spanning an energy range of more than five decades. Neutrons from this underground source were sorted by time of flight over a 304-m vertical path, and interacted with a /sup 238/Pu
M. G. Silbert, A. Moat, T. E. Young
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