Measurement of Electronic Stopping Power of Swift Heavy Ions using High-Resolution Time-of-Flight Spectrometer
Using only Time of Flight (ToF) information to determine energy loss, a new procedure based on a modified ToF-Energy Elastic Recoil Detection Analysis (ToF-E ERDA) set-up has been developed to simultaneously measure the electronic stopping powers of swift heavy ions over a continuous range of energies. This novel approach is demonstrated by measuring the stopping powers of Be, C, Si and Br in amorphous C over a continuous energy range from {approx}50 to {approx}900 keV per nucleon. In this procedure, the energy prior to entering the stopping foil and the exit energy are both measured by the ToF section. The Si detector, normally present in the ToF-E ERDA configuration, is only used to screen out the extraneous components. This procedure eliminates the well-known calibration problems of Si detectors when used with heavy ions. Consequently, the stopping powers and the energy dependence are determined with high precision. New stopping power data are determined in some energy regimes, and the overlapping of the present data with existing literature data in other energy ranges exhibits good agreement. However, the SRIM stopping powers exhibit some deviation from the measured values, up to 10%, in the energy range of 300-500 keV per nucleon. The modified set-up can be easily applied to measure the stopping power in any self-supporting foil.
- Research Organization:
- Pacific Northwest National Lab., Richland, WA (US), Environmental Molecular Sciences Laboratory (US)
- Sponsoring Organization:
- US Department of Energy (US)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 15001043
- Report Number(s):
- PNNL-SA-35532; APPLAB; 3448; KC0201020; TRN: US200415%%56
- Journal Information:
- Applied Physics Letters, Vol. 80, Issue 24; Other Information: PBD: 17 Jun 2002; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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