PNNL

Abstract

The stopping powers for He, Be and F ions in Au are determined using a previously developed Time-of-Flight Elastic Recoil Detection Analysis (TOF ERDA) set-up. In transmission geometry, the energy loss of particles in a self-supporting Au foil is measured over a continuous range of recoil energies using the time-of-flight (TOF) spectrometry with uncertainty of less than 5%. The stopping powers are parameterized using a sixth order polynomial and compared with existing experimental data in the literature. In the energy regimes where experimental data exist, the present data exhibit good agreement with most data. Stopping powers predicted by SRIM (The Stopping and Range of Ions in Matter) are in reasonable agreement with much of the experimental data.