The 240pu/239pu atom ratio in chinese soils
Web27 May 2024 · The 239+240Pu activities and 240Pu/239Pu atom ratios in the frozen soils of the Yellow River Source Area (YRSA) were determined to examine the Pu source and evaluate its environmental risk. The ... WebThe 240Pu/239Pu atom ratio is a very effective tool for the identification of the origin of plutonium (Pu) in the soil environment. We examine a dataset of 240Pu/239Pu atom …
The 240pu/239pu atom ratio in chinese soils
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Web30 May 2024 · For example, the mean 240 Pu/ 239 Pu atomic ratio (±a standard deviation) of cumulative global fallout Pu is 0.18 ± 0.01 in surface soils collected from 24 sites in 31–70°N region 8. WebDue to the different 240Pu/239Pu atom ratios from different sources of Pu in the environment, Pu isotopes have been widely used for source identification of radionuclides …
Web18 Apr 2011 · The atom ratios of 240 Pu/ 239 Pu in waters at Stns CB-23, CB-29 and CB-34 showed good agreement with the atom ratio in the sediment column from the Changjiang estuary. The total inventories of 239+240 Pu in the sediment columns were 81.5±1.0 MBq km −2 at the Changjiang estuary and 101±2 MBq km −2 at the shelf edge. WebThe 240Pu/239Pu atom ratios are reasonably consistent from year to year and are lower than fallout indicating an admixture of weapons-grade material, while the 242Pu/239Pu atom ratios are higher ...
WebSource of 239+240Pu in the environment of Northwest China and its causes HUANG Ya-nan 1, WU Meng-meng 2, XIAO Zhi 3 1. School of Marine Science, Sun Yat-sen University, Zhuhai 519082, China; 2. School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210023, China; 3.
WebThe 241Pu activities and/or the 241Pu/239Pu atom ratios are more sensitive than 240Pu/239Pu or 238Pu/239+240Pu activity ratios at detecting small Chernobyl 239+240Pu inputs, found in southern Poland. The mass spectrometric data show that the 241Pu activity is 40-62% Chernobyl-derived in southern Poland, and 58-96% Chernobyl in northeastern …
WebIn the five hot particles examined, the measured uranium atomic ratio was 235 U/ 238 U = 1.02 ± 0.16 and the Pu-isotopic ratios were as follows: 240 Pu/ 239 Pu = 0.0551 ± 0.0008 (atom ratio), 238 Pu/ 239+240 Pu = 0.0161 ± 0.0005 (activity ratio), 241 Pu/ 239+240 Pu = 0.87 ± 0.12 (activity ratio), and 241 Am/ 239+240 Pu = 0.169 ± 0.005 (activity … nanaskitchen.comWeb1 Jan 2005 · Extensive soil and sediment sampling was conducted along the Colorado Front Range and the plains east of the Front Range at locations believed to only be exposed to global fallout. The average 240Pu/239Pu atom ratio in the samples collected in Colorado was determined to be 0.165±0.008. A limited number of samples were collected at … megan knees challenge songWeb× Close. The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. nana sir ofori attaWeb28 May 2006 · We examined the vertical distributions of 239+240Pu activity and 240Pu/239Pu atom ratio in settling particles and quantified the particulate 239+240Pu fluxes in the water column in the western Northwest Pacific. Settling particle samples were collected using sediment traps. Plutonium isotopes were analyzed using a sector field … megan knight pinchinWeb15 Apr 2010 · The 240Pu/239Pu atom ratio from the Chinese nuclear test (CNT) site at Lop Nor is too complicated to identify the regional fallout source. However, radionuclides from the test site may be resolved mainly by the vertical distribution of radionuclides because there is no overlap between the global fallout peak and the local fallout peak. megan knorpp hatersWebTo further reveal plutonium transport and scavenging processes within the sediments of the East China Sea (ECS), this study analyzed spatial variation… megan knoll photography cincinnatiWeb暨南大学,数字图书馆. 开馆时间：周一至周日7:00-22:30 周五 7:00-12:00; 我的图书馆 megan knowles facebook