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6 ·Cesium bylo objeveno roku 1860 německým chemikem Robertem Wilhelmem Bunsenem a německým fyzikem Gustavem R Kirchhoffem za použití jimi objeven spektrální analýzy kteří cesium našli v dürkheimských minerálních vodách spolu s rubidiem
·Once it s generated during nuclear reactions if it s not carefully and immediately contained it causes serious illness and injury if even a tiny amount comes in contact with people
·Le 137 Cs metteur β donne naissance avec un rendement de 94 6 % au 137m Ba et avec un rendement de 5 4 % au baryum 137 stable Le 137m Ba de priode 2 55 minutes conduit au baryum 137 stable avec une mission gamma 661 7 keV rendement 85 % 137 Cs Priode radioactive 30 ans Activit massique 3 22 × 10 12 1
·A new perspective on the 137 Cs retention mechanism in surface soils or less of the soil 137 Cs and most of the 137 Cs was contained within of radioactive and stable cesium in Fukushima
If the initial mass of a sample of cesium 137 is kg how much will remain after 150 years kg/ g Given that the half life of carbon 14 is 5730 years consider a sample of fossilized wood that when alive would have contained 24 g of carbon 14 It now contains g of carbon 14 How old is the sample 23000 years old
·cesium 137 brachytherapy source fabrication technology 491 essential to change the cutting wheel periodically after a certain number of cutting operations 60 70
·Cesium contained in each ash sample was leached with mol/L HNO 3 for several times Ammonium phosphomolybdate AMP was added to water or leachate sample from the ash sample to adsorb cesium
·The cesium 137 inventory obtained for the reference site is about 1341 Bq m−2 For the core contained all the Cs 137 stock Landsberger and Mann 2003 At both cultivated sites the sampling strat egy was elaborated based on two soil transects arranged
The water contained an unknown element Bunsen suggested calling the element cesium from the Latin word caesius for "sky blue " For many years the name was also spelled caesium Cesium 137 is often used in scientific research also For example cesium tends to stick to particles of sand and gravel This fact can be used to measure the
·cobalt 60 and cesium 137 through atomic reactors has completely transformed the situation As already indicated sources equivalent to hundreds or even thousands of grams of radium are commonplace Indeed a single multi kilocurie unit may contain radio active material equivalent to more than the total amount of radium existing in the world
OVERVIEW Cesium has been identified in at least 8 of the 1 636 hazardous waste sites that have been proposed for inclusion on the EPA National Priorities List NPL HazDat 2003 It was reported that 134 Cs has been found in at least 3 of the 1 636 current or former NPL sites and 137 Cs has been detected in at least 23 of the 1 636 current or former NPL sites
The finding that blood plasma always contained lower cesium 137 concentrations than did any tissue indicates that cesium is accumulated in tissues against a concentration gradient This is particularly evident in the ease of blood cells which reached an equi librium value of 15 times the plasma concentration; the blood cell con centration in
·For instance cesium 137 is found in the environment following accidental releases aerial tests of nuclear weapons and accidents 1957 in Kyshtym Chelyabinsk Russia and Windscale United
Cesium 137 deposition maps A Relative deposition contributions between March 11 and 19 showing the areas potentially effected by 137 Cs before the start of sums of the depositions during the period were divided by the maximum deposition in the accumulated field B The same as in A but for March 20 April 19 C An example of estimated daily
Twenty seven fully loaded /sup 137/Cs aluminosilicate pellets were fabricated in a hot cell by the vacuum hot pressing of a cesium carbonate/montmorillonite clay mixture at 1500/sup 0/C and 570 psig Four pellets were selected for characterization studies which included calorimetric measurements metallography scanning electron microscope and electron backscattering
·The analysis results showed that they contained trace amounts of carbon 14 cobalt 60 strontium 90 iodine 129 and cesium 137 of which strontium 90 was not detected in the second round of discharge from Oct 5 according to reports released on Thursday by TEPCO TEPCO claims that its ALPS facility a multi nuclide removal system can remove 62
The powder is a substance known as Cesium 137 It s a by product of nuclear fission and used in radiation therapy for treating cancer Stored in its protective canister the Cesium poses little threat But when the substance is not properly contained the levels of radiation it
·Cesium 134 and 137 activities in the central North Pacific Ocean after the Fukushima Dai ichi Nuclear Power Plant accident acrylonitrile PAN Šebesta 1997 The materials contained 80% by weight of active component AMP PAN grain size was used for cesium separation from acidified seawater samples; untreated samples
•Small capsule contained about 93 grams oz of highly radioactive cesium chloride Cs 137 CsCl •The IAEA states that the source contained TBq 1 380 Ci when it was taken away •80 grams of CsCl powder resulted in more than 40 tons of radioactive waste
Cesium 137 sources may hold up to 2 individual sources recommended capacity of 370 MBq 10 mCi up to TBq 2 200 Ci Single or dual Cesium 137 source models Self contained exposure chamber; 0 X1000 attenuator set; Large viewing window; Dual axis positioning track; Ports for extendable probes;
·Caesium 137 Cs 137 is a radionuclide present in the environment mainly as the result of the atmospheric nuclear weapons testing and accidents arising in nuclear power plants like the Chernobyl accident in the health consequences resulting from a chronic exposure to this radionuclide remain unknown After absorption the caesium is distributed
misc{etde 6129375 title = {Estimating soil erosion losses in Korea with fallout cesium 137} author = {Menzel R G Jung Pilkyun Ryu Kwanshig and Um Kitai} abstractNote = {The contents of fallout /sup 137/Cs in soil profiles were used to estimate erosion losses from steeply sloping croplands in Korea Seven undisturbed sites with no apparent erosion or deposition
·Caesi 137 có nhiều ứng dụng thực tiễn Với lượng nhỏ nó được sử dụng để hiệu chỉnh các thiết bị đo phóng xạ [5] Trong y học nó được dùng trong xạ trị [5] Trong công nghiệp nó được dùng trong đồng hồ đo dòng chảy thiết bị đo độ dày [5] thiết bị đo mật độ độ ẩm đối với số ghi mật
·ABOUT CESIUM 137 The element of interest within the Goiânia tragedy primarily focuses on the radioactive isotope Cesium 137 Cs 137 Originating from uranium 234 or plutonium 239 Cs 137 is an unintended byproduct of the material through nuclear fission It is commonly found on smaller scales from medical machinery and infamously connected
·Thus out of the total cesium 137 contained in the milk produced in Iwate it was concluded that the ratio of ± was derived from the Fukushima nuclear accident The origins and concentrations of cesium 137 in the samples were compared based on the production areas Figure 2 In western Japan P U which was supposed to have been
Proportion of iodine 131 and cesium 137 contained in the soil layer from surface to or cm depth Fig 1 Vertical profiles of iodine 131 and cesium 137 in the cesium 137 were 313 334 and 129 kBq/m 2 respec tively All of iodine 131 originating from global fallout already decayed The cesium 137 inventories were far
Cesium ion quasistatic leachability measurements determined the leach rates of fully loaded /sup 137/Cs sectioned pollucite pellets to date to be to x 10/sup 10/ kg m/sup 2/s/sup 1/ while static leach tests performed on unsectioned fully loaded pellets showed the leach rates of the cesium ion to date to be to x 10/sup
