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Mound Laboratory annual report CY 1974

Description: This 1974 annual report presents a brief overview of work being performed in the following areas at the Mound Plant: explosive operations, nuclear operations, analytical developments, environmental control and waste management, computer programming, and supporting activities.
Date: October 1, 1975
Creator: Flitcraft, R. K.
Partner: UNT Libraries Government Documents Department

Emittance measurements of high charge state argon beams from a pig source

Description: The emittances of beams of Ar$sup 4+$ to Ar$sup 8+$ were measured in the axial and radial planes. The extraction voltage was 10 kV and the magnetic field was varied from about 0.5 to 0.6 Tesla. The anode slit was varied in distance from the arc, which was run both dc and pulsed. The emittance was nearly independent of charge state, but increased with total beam current. A small bowing of the arc column, which made evaluation of mirror field effects difficult, was discovered. (auth)
Date: October 1, 1975
Creator: Bex, L.; Clark, D.J.; Ellsworth, C.E.; Estrella, R.M.; Gough, R.A. & Holley, W.R.
Partner: UNT Libraries Government Documents Department

Radionuclides in Canada goose eggs

Description: Low levels of radionuclides were measured in Canada goose eggs taken from deserted nests from Columbia River islands on the Energy Research and Development Administration's Hanford Reservation. Potassium-40, a naturally occurring radionuclide, was the most abundant radionuclide measured in egg contents and egg shell. Strontium-90 was incorporated into egg shells and cesium- 137 into inner egg contents. Manganese-54, cobalt-60, and zinc-65 were more abundant in inner egg contents than in egg shell. Cerium-144 was detected in egg shell but not in inner shell. (auth)
Date: January 1, 1975
Creator: Rickard, W.H. & Sweany, H.A.
Partner: UNT Libraries Government Documents Department

Plutonium and cesium radionuclides in the Hudson River Estuary. Annual technical progress report, December 1, 1974--November 30, 1975

Description: We have obtained a large set of gravity cores from the Hudson Estuary through much of the ambient salinity range. A number of core sections have been analyzed for $sup 137$Cs, $sup 134$Cs, $sup 60$Co, and $sup 40$K by direct gamma counting, and for $sup 239$,$sup 240$Pu by alpha-spectrometry. The distribution of both $sup 137$Cs and $sup 239$,$sup 240$Pu indicates rapid accumulation in marginal cove areas and in the harbor region adjacent to New York City. The distribution of both $sup 137$Cs and $sup 239$,$sup 240$Pu in the sediments is quite similar in surface sediments, and the trends with depth in cores are also similar. The ratio of sediment $sup 239$,$sup 240$Pu to $sup 137$Cs throughout the sampled salinity range (0-20 $sup 0$/$sub 00$) approximates that in fallout, except near the nuclear reactor at Indian Point where releases of $sup 137$Cs result in a ratio lower (0.004 to 0.008) than typical of fallout (0.015). Measurement amounts of reactor-derived $sup 134$Cs, $sup 60$Co, and $sup 54$Mn are found in nearly all of the samples containing appreciable $sup 137$Cs. These samples were between 15 km upstream of Indian Point reactor site and the downstream extent of our sampling, 70 km south of the reactor. (auth)
Date: January 1, 1975
Creator: Simpson, H.J. & Williams, S.C.
Partner: UNT Libraries Government Documents Department

Mass measurements of highly neutron-excess nuclei in the light elements

Description: The $sup 26$Mg($sup 7$Li,$sup 8$B)$sup 25$Ne reaction at 78.9 MeV was used to measure the mass-excess of $sup 25$Ne (-2.18 +- 0.10 MeV) and several low- lying excited states. Mass-excesses for $sup 43$Ar (-31.98 +- 0.07 MeV), $sup 45$Ar (-29.727 +- 0.06 MeV), and $sup 46$Ar (-29.732 +- 0.07 MeV) were determined from the $sup 48$Ca($alpha$,$sup 9$,$sup 7$Be)$sup 43$,$sup 45$Ar reactions at 77.7 MeV and the $sup 48$Ca($sup 6$Li,$sup 8$B)$sup 46$Ar reaction at 80.1 MeV. Several excited states of $sup 43$Ar and $sup 45$Ar were observed. These and the excited states of $sup 25$Ne are compared with theoretical predictions. Ground state differential cross sections are given for all reactions, ranging from 0.1 to 1 $mu$b/sr at forward angles. Upper limits of about 1 to 25 nb/sr were determined for the ground state cross sections of the reactions $sup 48$Ca($alpha$,$sup 8$,$sup 10$,$sup 11$B)$sup 44$,$sup 42$,$sup 41$Cl and $sup 48$Ca($alpha$,$sup 10$-$sup 13$C)$sup 42$-$sup 39$S at 110 MeV. Recoil coincidence techniques were used to measure the mass-excess of the particle- unbound nucleus $sup 10$Li(33.83 +- 0.25 MeV) by the $sup 9$Be($sup 9$Be,$sup 8$B)$sup 10$Li reaction at 121 MeV; the ground state cross section was 30 nb/sr. The $sup 14$C($sup 9$Be,$sup 8$B)$sup 15$B reaction at 120 MeV was also investigated using coincidence techniques. Contamination problems only permitted determining a ground state cross section upper limit of 50 nb/sr. A simple mass relation is derived, similar in approach to the Garvey-Kelson method but taking more explicit account of shell effects. Comparison is made with the Garvey- Kelson relation, and predictions of masses and of the stability of neutron-excess light nuclei are given for both methods. The modified mass relation is shown to offer better account for highly neutron-excess nuclei, including the values reported here for $sup 25$Ne and $sup 43$,$sup 45$,$sup 46$Ar. (26 figures, 2 ...
Date: May 1, 1975
Creator: Wilcox, K.H.
Partner: UNT Libraries Government Documents Department

Radiological survey of plants, animals, and soil in micronesia

Description: In 1974 the Laboratory of Radiation Ecology began a program to determine the radionuclides found in foods, plants, animals, and soils of the Central Pacific. As part of this program the present study was undertaken to determine radionuclides found in the common foods and soils in areas of Micronesia other than those areas receiving local fallout from the test sites at Bikini or Enewetak atolls. Areas sampled in 1975 were Majuro Atoll in the Marshall Islands, Truk and Ponape in the Caroline Islands, Guam in the Marianas Islands, and Koror and Babelthaup in the Palau Islands. All samples were analyzed for gamma-emitting radionuclides while some were also analyzed for /sup 90/Sr of /sup 239/ /sup 240/Pu. Results of the analyses indicate that naturally occurring /sup 40/K is the predominant radionuclide in the biological samples. Cesium-137 in amounts less than 1 pCi/g (dry) was the only fallout radionuclide detected in most of the biological samples. Soil samples usually contained /sup 90/Sr, /sup 137/Cs, /sup 238/U, and /sup 239/Pu, while soil from Truk, Palau, and Ponape also contained isotopes of radium and thorium. Soil from Guam also contained /sup 210/Pb and /sup 235/U in addition to the above radionuclides. Considering only the fallout radionuclides, the values for /sup 90/Sr, /sup 137/Cs, and /sup 239/ /sup 240/Pu in samples from Guam, Palau, Truk, Ponape, and Majuro are less than the values for these radionuclides in similar samples from atolls such as Utirik, Rongerik, and Ailinginae in the northern Marshall Islands, and are much less than values of these radionuclides in samples from Bikini and Rongelap atolls.
Date: November 1, 1975
Creator: Nelson, V.A.
Partner: UNT Libraries Government Documents Department