Spectroscopic Investigation of Heavy Ion Stopping Processes in Solids

Electronic stopping of heavy ions in the Kaneko model.

The familiar results of eeective charge theory of the electronic stopping of heavy ions in solids have hitherto been based on the target model of a homogeneous electron gas. Thèheavy ion scaling rule' and experimental proton data were used to incorporate the major information on the polarization of real target materials. Introducing Kaneko's generalized target dielectric functions provides a de...

Low-mass secondary-ion ejection from molecular solids by MeV heavy ions: Radial velocity distributions.

Secondary ions sputtered in individual MeV ion impacts are analyzed in a high resolution time-of-flight mass spectrometer. The initial radial velocity distributions of low mass ~up to m/z'300 u! positive and negative secondary ions, sputtered from carbon-containing molecular solids ~polymers, bioorganic molecules, and fullerene targets! are investigated. The first (^v&! and second ~^v&! moments...

Investigation of collective radial expansion and stopping in heavy ion collisions at Fermi energies

Local Field Correction Effect on Dicluster Stopping Power in a Strongly Coupled Two-Dimensional Electron Gas System

We calculate the stopping power for heavy-ion diclusters moving in a strongly coupled two-dimensional electron gas system by using the local field corrected dielectric function at finite temperature. We obtain a parameterized local field correction factor based on a relation between the thermal compressibility and exchange-correlation energy in two-dimension. The interpolated parameter is deriv...

Nuclear stopping as a probe for in-medium nucleon-nucleon cross sections in intermediate energy heavy ion collisions.

Using an isospin-dependent quantum molecular dynamics, nuclear stopping in intermediate heavy ion collisions has been studied. The calculation has been done for colliding systems with different neutron-proton ratios in beam energy ranging from 15 MeV/ u to 150 MeV/ u. It is found that, in the energy region from above Fermi energy to 150 MeV/ u, nuclear stopping is very sensitive to the isospin ...