The concept of recovering minerals from seawater has been proposed as a way of counteracting the gradual depletion of conventional mineral ores. Seawater contains large amounts of dissolved ions and the four most concentrated metal ones (Na, Mg, Ca, K) are being commercially extracted today. However, all the other metal ions exist at much lower concentrations. This paper reports an estimate of ...

Uranium fission chambers are commonly used for neutron beam monitoring in research facilities. The challenges brought with the renewing or commissioning of new facilities encourage to minimize interaction between monitor and beam. In order characterize both their detection efficiency transmission factor, several chambers, have been scanned on CT1 monochromatic line ILL. Results show that transp...

2014 Superheavy elements have been searched for by neutron induced fission of mass separated samples. Various natural materials have been investigated : minerals, manganese nodules, lunar dust, meteoritic materials. Fissioning masses have been collected in the A = 300 mass region. However, one cannot conclude that these masses are superheavy elements because of a possible contamination of this ...