The value of thé sup 233U/sup 242Pu percentage of the tracer provides been attained with a comparable accuracy of 0,5 per nickel. This answer has been recently prepared really thoroughly by evaluating uranium and plutonium of known chemical purity, and we think that it can be guaranteed to be a good reference alternative. With this technique, a second calibration of thé tracer Tsub 2 provides been performed using a new standard answer. The materials which cannot be transformed after each operation is thoroughly washed every period a brand-new sample can be treated.
The evaporations are usually carried out therefore as to prevent the development of saturated vapours inside the glove container. We have also attempted to remove as significantly as probable the isotopic cóntaminations by:using á even more rational functional method the products used offers long been the item of a exclusive study. We possess therefore ended up led to modify certain components of the functional technique so as to have got an effective routine and to thereby enhance the U/Pu separation the stability of the thérmionic emission of thé plutonium, connected to the amount of residual uranium, has at the exact same time been improved and we can right now carry out even more specific isotopic analyses. Right now it has been noticed that the existence of an extra of uranium considerably changes the oxidation-reduction response kinetics of thé plutonium. This work has proven the significance of the valency period which should create it probable to obtain a uniform isotopic submission in structure tracer mixes, and furthermore a sufficient U/Pu separation. SECACI has made accessible to the SSM the necessary room and tools in its Fonténay laboratories. Dilutionby Sebaci ánd SSM in cooperation.
0 kommentar(er)
