New sub-grid stochastic acceleration model in les of high-Reynolds-number flows

International audienc

Some selected problems in supersonic combustion

Communication to : 16th Brazilian congress of mechanical engineering, Uberlandia (Brazil), November 23-26, 2001SIGLEAvailable from INIST (FR), Document Supply Service, under shelf-number : 22419, issue : a.2002 v.32 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc

On the volatility of nihonium (Nh, Z = 113

Gas-phase chromatography studies of nihonium (Nh, $Z=113$ were carried out at the one-atom-at-a-time level. For the production of nihonium, the heavy-ion-induced nuclear fusion reaction of$^{48}$ Ca with$^{243}$ Am was used. This leads to isotopes$^{284, 285}$ Nh, as the direct descendants of the $\alpha$ -decaying precursors$^{288, 289}$ Mc. Combining the Dubna Gas-Filled Recoil Separator with gas-phase chromatographic separation, the experiment was sensitive to elemental nihonium and its adsorption behavior on Teflon, theoretically predicted by modern relativistic density functional theory. The non-observation of any decays of Nh after the chemical separation indicates a larger than expected retention of elemental Nh on a Teflon surface