SHIM 2015 Swift Heavy Ions in Matter

In this talk I will give an overview of the transient nonequilibrium electron and atomic kinetics after high-energy deposition in dielectric. An ultrafast energy deposition can be made my means of x-ray free-electron laser (FEL) irradiation or swift-heavy ion (SHI) beams. The differences between the two methods will be discussed. In both cases, first, the electron subsystem of a dielectric is...

Organic polymers display some of the most prevalent applications in ion track technology. With the high susceptibility of ion tracks to chemical etching, track-etched polymers are commonly utilized for the production of nano-porous track-membranes and filters, embedding microelectronic devices such as micro-capacitors, diodes and nanowires as well as for in-vivo storage vessels and a large...

Unlike beta- and gamma-rays irradiations that lead to quite homogeneous energy deposition, Swift Heavy Ions (SHI) induce an heterogeneous energy deposition at the nanoscale level. Due to their high LET and because SHI deposit their energy close to the ion path, in a track core of a few nanometers, the local dose nearby these track cores is huge; in between, the dose is very low. A great number...

In this work, the influence of spatial confinement in one dimension on the chemical effects induced by 2.2 GeV Bi and 2 MeV H ions in ultrathin PMMA films was investigated, by quantifying bond breaking rates as a function of the thickness h of the polymer layers (2<h<200 nm). Our data indicate that for both beams damage cross-sections for carbon-oxygen bonds, do not show substantial difference...