4 research outputs found
Are Interaction-free Measurements Interaction Free?
In 1993 Elitzur and Vaidman introduced the concept of interaction-free
measurements which allowed finding objects without ``touching'' them. In the
proposed method, since the objects were not touched even by photons, thus, the
interaction-free measurements can be called as ``seeing in the dark''. Since
then several experiments have been successfully performed and various
modifications were suggested. Recently, however, the validity of the term
``interaction-free'' has been questioned. The criticism of the name is briefly
reviewed and the meaning of the interaction-free measurements is clarified.Comment: 11 pages, 3 eps figures. Contribution to the ICQO 2000, Raubichi,
Belaru
New facility for simultaneous implantation and evaporation
The Groningen isotope separator has been extended with a double uhv evaporation system. Implantation and evaporation can now be done at the same time under good vacuum conditions. Implanted systems with thicknesses up to 6.3 μm have been produced
Isolated tin fluoride molecules in a copper lattice
A Mössbauer absorber was made by simultaneous evaporation of copper and implantation of119Sn, and postimplantation of F. A large fraction of Sn4+ was formed, assigned to the formation of SnF4
Simulation of Ion-Beam Channeling in Icosahedral Al63Cu25Fe12
Monte Carlo simulations of channeling on the icosahedral quasicrystal Al63Cu25Fe12 were made, using an experimentally determined structure model for this phase. The channeling effect was found to be nearly as good as for a normal, periodic crystal. Dip widths are in agreement with experimental values, but minimum yields are not. The minimum yield is inversely proportional to the beam energy at low energy. Future experiments to be done are proton-induced-x-ray-channeling experiments and Rutherford-backscattering-channeling experiments at low energy