Measurement and Simulation of Planar Channeling of Protons in CaF₂ and BaF₂

抄録

Depth profiles of nuclear-encounter probabilities of planar channeled protons in CaF₂ and BaF₂ are studied. For the analysis of the experimental results, time evolution of the spatial distribution of ion flux in the planr channel is simulated. In the simulation a continuum planar potential derived from the ion-ion interaction potentials is used and the momentum fluctuation due to scattering with electrons and thermally vibrating atoms is taken into account. From the depth dependence of the flux distribution, the nuclear-encounter probabilities are obtained, which are in good agreement with the experimental results obtained by backscattering and nuclear reaction measurements.