Low Ion Velocity Slowing Down in a Demixing Binary Ionic Mixture

we pay attention to ion projectile slowing down at low velocity Vp $<$ Vthe, target thermal electron velocity, in a strongly coupled and demixing H-He ionic mixture. It is investigated in terms of quasi- static and critical charge-charge structure factors [1]. Non- polarizable as well as polarizable and partialy degenerate electron backgrounds are given attention. The low velocity ion slowing down can turn negative in the presence of long wavelength and low frequency hydromodes, signaling a first order critrical demixtion. Such a process is shown to document a superelastic energy transfer from target plasma ions to the incoming and slow ion projectile [2].\\[4pt] [1] D. Leger and C. Deutsch, Phys.Rev. A37, 4916, 4930 (1988)\\[0pt] [2] C. Deutsch, D. Leger and B. Tashev, Laser Part.Beams 29, 121 (2011)